K
Khách

Hãy nhập câu hỏi của bạn vào đây, nếu là tài khoản VIP, bạn sẽ được ưu tiên trả lời.

25 tháng 12 2019

1. Nga didn't go to school . She was sick ( because )

Nga didn't go to school because she was sick.

2. You will lose your job . You are late again ( if )

If you are late again , you wil lose your job.

3. If she doesn't hurry, she'll miss the bus ( Unless )

Unless she hurries, she will miss the last train.

4. I was careless . I broke the cup ( because )

Because I was careless,I broke the cup

5. It was raining heairly out side . We postpoued the picnic ( as )

as it was raining heavily outside, we postponed the picnic .

6. The weather isn't fine. We won't take photos

If the weather isn't fine, we won't take photos.

25 tháng 12 2019

Viết lại câu

1. Nga didn't go to school . She was sick ( because )

Nga didn't go to school because she was sick.

2. You will lose your job . You are late again ( if )

If you are late again , you wil lose your job.

3. If she doesn't hurry, she'll miss the bus ( Unless )

Unless she hurries, she will miss the last train.

4. I was careless . I broke the cup ( because )

Because I was careless,I broke the cup

5. It was raining heairly out side . We postpoued the picnic ( as )

as it was raining heavily outside, we postponed the picnic .

6. The weather isn't fine. We won't take photos

If the weather isn't fine, we won't take photos.

*Practice: Complete the sentences with “because/as/since, if, unless, when, so”.1. We decided to go out for a meal ____________ we had no food at home.2. He has a very important job ____________ he is particularly well-paid.3. Can I borrow that book ____________ you’ve finished it?4. You canh drive a car ____________ you've got a license.5. No one was watching the television ____________ I switched the television off.6. ____________ she changed a lot, we didn't recognize her.7....
Đọc tiếp

*Practice: Complete the sentences with “because/as/since, if, unless, when, so”.1. We decided to go out for a meal ____________ we had no food at home.

2. He has a very important job ____________ he is particularly well-paid.

3. Can I borrow that book ____________ you’ve finished it?

4. You canh drive a car ____________ you've got a license.

5. No one was watching the television ____________ I switched the television off.

6. ____________ she changed a lot, we didn't recognize her.

7. ____________ you're ready, we can start now.

8. I'm going away for a few days. I’ll phone you ____________ I get back.

9. You should inform the police ____________ your bicycle is stolen.

10. Matthew went to bed ____________ it was too late to go out
* Practice: Rewrite the following sentences with BECAUSE / BECAUSE OF.

1. He couldn’t meet you because of being busy

.............................................................................................................................................................................................

2. Nobody can do this test because of its difficulty

.........................................................................................................................................................................................................

3. She went to bed early because of her sickness

.........................................................................................................................................................................................................

4. Two cars canh pass each other because the road is narrow

.........................................................................................................................................................................................................

5. We spent the whole day in the garden because the weather is lovely.

.........................................................................................................................................................................................................

6. We can’t swim in this part of the river because the water is highly polluted.

.........................................................................................................................................................................................................
Ex: Although/ though/ even though it was raining, we went out.= We went out although/ though/ even though it was raining.

* Practice:

1. He is very rich. He is not happy. (although).

........................................................................................................................................................................................................

2. He tried. He was not successful. (though).

........................................................................................................................................................................................................

3. He got good jobs. He was not satisfied. (even though).

........................................................................................................................................................................................................

4. He often tells lies. Mary believes him. (although).

........................................................................................................................................................................................................

5. She can’t answer my question. She is very intelligent. (although).

........................................................................................................................................................................................................

6. The weather changed, but the picnic went ahead as planned. (though).

........................................................................................................................................................................................................
 

3
21 tháng 6 2019

1. We decided to go out for a meal _____because_______ we had no food at home.

2. He has a very important job ___so_________ he is parularly well-paid.

3. Can I borrow that book _____when _______ you’ve finished it?

4. You can drive a car _____if_______ you've got a license.

5. No one was watching the television _____so_______ I switched the television off.

6. ______Because______ she changed a lot, we didn't recognize her.

7. ______Unless______ you're ready, we can start now.

8. I'm going away for a few days. I’ll phone you _____when _______ I get back.

9. You should inform the police ____if________ your bicycle is stolen.

10. Matthew went to bed ______because______ it was too late to go out

21 tháng 6 2019

1. He couldn’t meet you because of being busy

...He couldn’t meet you because he was busy .............................................................................................

2. Nobody can do this test because of its difficulty

.........Nobody can do this test because it 's difficult........................................................................

3. She went to bed early because of her sickness

....... She went to bed early because she was sick...........................

4. Two cars can't pass each other because the road is narrow

..........Two cars can't pass each other because of the narrow road.............................................................

5. We spent the whole day in the garden because the weather is lovely.

..............We spent the whole day in the garden because of the lovely wheather ...............................

6. We can’t swim in this part of the river because the water is highly polluted.

.........We can’t swim in this part of the river because of the fact that the water is highly polluted........................................

1 tháng 12 2019

1.If you..study.(study) hart,you will pass the written examination.

2.If the weather..is.(be)fine,we will go for a picnic.

3.he.will write..(write)to you if he time.

4.They...(have)a lot of fun if they come there.

will have

5.If she..doesn't hurry.(not hurry),she will miss the bus.

6.You would feel better if you(take)..took.a short rest.

7.What(happen).would happen..if the moon disappeared?

8.If I..were.a bird,I would be a dove.

9.Ifwe flew,we(see)..would see.the world from above easily.

10.Had I had a map .I..wouldn't have lost.(not lose)way.

1 tháng 12 2019

1.If you.STUDY..(study) hart,you will pass the written examination.

2.If the weather.IS.(be)fine,we will go for a picnic.

3.he..WILL WRITE.(write)to you if he time.

4.They..WILL HAVE.(have)a lot of fun if they come there.

5.If she..DOESN'T HURRY.(not hurry),she will miss the bus.

6.You would feel better if you(take).TOOK..a short rest.

7.What(happen)...WOULD HAPPEN if the moon disappeared?

8.If I..WERE.a bird,I would be a dove.

9.If we flew,we(see).WOULD SEE..the world from above easily.

10.Had I had a map .I..WOULDN'T HAVE LOST.(not lose)way.

13 tháng 11 2018

VI-Supply the correct verb form

1. If you study (study) hard, you will pass the written examination

2. If the weather is (be) fine, We will go for a picnic

3. He will write (write) to you if he has time

4. They will have (have) a lot of fun if they come there

5. If she doesn't hurry(not hurry), she will miss the bus

6.Had I had a map, I wouldn't have lost way (not lose)

7. He said he would go (go) to HCM city the following day

8. She asked if my school was (be) near there

9. Maryam said she had to (must) go then

10. I asked her where she lived (live)

11. The examiner asked me if I spoke (speak) any foreign languages

Mọi người giúp mình với, mình đang cần gấp, xin cảm ơn ạ I/ rewrite the sentences with the words given 1. She began to teach at this school in 2005 -> she has... 2. They began to learn English 4 years ago -> they have.... 3. We finished our homework yesterday -> we have... 4. I last saw her 5 months ago -> i haven't... 5. The last time i went fishing was in 2004 -> i haven't... 6. It is many years since we last met him ->we haven't... 7. It is a long...
Đọc tiếp

Mọi người giúp mình với, mình đang cần gấp, xin cảm ơn ạ

I/ rewrite the sentences with the words given

1. She began to teach at this school in 2005

-> she has...

2. They began to learn English 4 years ago

-> they have....

3. We finished our homework yesterday

-> we have...

4. I last saw her 5 months ago

-> i haven't...

5. The last time i went fishing was in 2004

-> i haven't...

6. It is many years since we last met him

->we haven't...

7. It is a long time since she visited my family

-> she hasn't...

8. Why don't we take a bus to school?

-> how about

9. I think we should put some garbage bins here

-> what about..

10. Let's do something to help the children

-> how about

11. Let's take these bottles to a recycling center

-> i suggest that...

12. Why don't we reuse those plastic bags?

-> i suggest that...

13. How about replace the broke window?

-> i suggest that

14. If it doesn't rain, we will have lunch in the garden

-> unless

15. If you don't study harder, you will fail the exam

-> unless

16. If they are not careful, they will lose all the money

-> unless..

17. Unless she studies harder, she will fail the exam

-> if...

18. Unless you stop smoking, you will die soon

-> if...

19. Unless it is rainy, we will have lunch outdoor

-> if..

20. Drive carefully or you will kill yourself

-> if

21. Keep silent or you will wake up the baby

-> if...

22. Don't go out or you will get a cold

-> if...

23. Don't fish here or you will be fined heavily

-> if...

24. He drove carelessly, so she caused the accident

-> since

25. It snowed heavily, so we couldn't go out

-> we

26. It began to rain, so they stopped working

-> because...

27. I got up late, so i didn't have tine for breakfast

-> i didn't

28. The film was boring, so he turned off the TV

-> since

29. Hoa was careless, so she broke vase

-> hoa broke

2
30 tháng 7 2017

I/ rewrite the sentences with the words given

1. She began to teach at this school in 2005

-> She has taught at this school since 2005.

2. They began to learn English 4 years ago

-> They have learned English for 4 years.

3. We finished our homework yesterday

-> we have finished our homework since yesterday .

4. I last saw her 5 months ago

-> I haven't seen her for 5 months .

5. The last time i went fishing was in 2004

-> I haven't gone fishing since 2004.

6. It is many years since we last met him

->We haven't met him for many years.

7. It is a long time since she visited my family

-> She hasn't visited my family for a long time.

8. Why don't we take a bus to school?

-> How about taking a bus to school?

9. I think we should put some garbage bins here

-> What about putting some garbage bins here?

10. Let's do something to help the children

-> How about doing something to help the children?

11. Let's take these bottles to a recycling center

-> I suggest that we should take these bottles to a recycling center.

12. Why don't we reuse those plastic bags?

-> I suggest that we should reuse those plastic bag.

13. How about replace the broke window?

-> I suggest that we should replace the broke window.

14. If it doesn't rain, we will have lunch in the garden

-> Unless it rains, we will have lunch in the garden.

15. If you don't study harder, you will fail the exam

-> Unless you study harder, yu will fail the exam.

16. If they are not careful, they will lose all the money

-> Unless they are careful , they will lose all the money.

17. Unless she studies harder, she will fail the exam

-> If she doesn't study harder, she will fail the exam.

18. Unless you stop smoking, you will die soon

-> If you don't stop smoking, you will die soon.

19. Unless it is rainy, we will have lunch outdoor

-> If it isn't rainy, we will have lunch outdoor.

20. Drive carefully or you will kill yourself

-> If you don't drive carefully, you will kill yourself.

21. Keep silent or you will wake up the baby

-> if...

22. Don't go out or you will get a cold

-> If you go out, you will get a cold.

23. Don't fish here or you will be fined heavily

-> If you fish here, you will be fined heavily.

24. He drove carelessly, so he caused the accident

-> Since he drove carelessly, he caused the accident.

25. It snowed heavily, so we couldn't go out

-> We couldn't go out because it snowed heavily.

26. It began to rain, so they stopped working

-> Because it began to rain , they stopped working.

27. I got up late, so i didn't have tine for breakfast

-> i didn't have tine for breakfast because I got up late.

28. The film was boring, so he turned off the TV

-> Since the film was boring, he turned off the TV.

29. Hoa was careless, so she broke vase

-> Hoa broke vase because of her carelessness.
30 tháng 7 2017

I/ rewrite the sentences with the words given

1. She began to teach at this school in 2005

-> She has taught at this school since 2005.

2. They began to learn English 4 years ago

-> They have learned English for 4 years.

3. We finished our homework yesterday

-> we have finished our homework since yesterday .

4. I last saw her 5 months ago

-> I haven't seen her for 5 months .

5. The last time i went fishing was in 2004

-> I haven't gone fishing since 2004.

6. It is many years since we last met him

->We haven't met him for many years.

7. It is a long time since she visited my family

-> She hasn't visited my family for a long time.

8. Why don't we take a bus to school?

-> How about taking a bus to school?

9. I think we should put some garbage bins here

-> What about putting some garbage bins here?

10. Let's do something to help the children

-> How about doing something to help the children?

11. Let's take these bottles to a recycling center

-> I suggest that we should take these bottles to a recycling center.

12. Why don't we reuse those plastic bags?

-> I suggest that we should reuse those plastic bag.

13. How about replace the broke window?

-> I suggest that we should replace the broke window.

14. If it doesn't rain, we will have lunch in the garden

-> Unless it rains, we will have lunch in the garden.

15. If you don't study harder, you will fail the exam

-> Unless you study harder, yu will fail the exam.

16. If they are not careful, they will lose all the money

-> Unless they are careful , they will lose all the money.

17. Unless she studies harder, she will fail the exam

-> If she doesn't study harder, she will fail the exam.

18. Unless you stop smoking, you will die soon

-> If you don't stop smoking, you will die soon.

19. Unless it is rainy, we will have lunch outdoor

-> If it isn't rainy, we will have lunch outdoor.

20. Drive carefully or you will kill yourself

-> If you don't drive carefully, you will kill yourself.

21. Keep silent or you will wake up the baby

-> If you don't keep silent, you will wake up the baby.

22. Don't go out or you will get a cold

-> If you go out, you will get a cold.

23. Don't fish here or you will be fined heavily

-> If you fish here, you will be fined heavily.

24. He drove carelessly, so he caused the accident

-> Since he drove carelessly, he caused the accident.

25. It snowed heavily, so we couldn't go out

-> We couldn't go out because it snowed heavily.

26. It began to rain, so they stopped working

-> Because it began to rain , they stopped working.

27. I got up late, so i didn't have tine for breakfast

-> i didn't have tine for breakfast because I got up late.

28. The film was boring, so he turned off the TV

-> Since the film was boring, he turned off the TV.

29. Hoa was careless, so she broke vase

-> Hoa broke vase because of her carelessness.
5 tháng 8 2016

1. I'm going to the post office because of sending some postcards.

2. Jane was worried because of staying at home alone.

3. Tom couldn't get the job because of uncertainly during the interview.

4. I have to work extra hours because helping support my family.

5. We adore him because of his talent.

6. We delayed the flight because of the bad weather.

7. I haven't finished my assignment yet because of lacking materials.

8. I feel attracted to her because of her sweet voice.

9. She há to depend on us because of her orphanage. 

5 tháng 8 2016

1,I'm going to the post office because I have some postccards to send

I'm going to the post office because of sending some postcards

2, jane was worried as she stayed at home alone

jane was worried because of staying at home alone

3, because he was not confident during the in terview, Tom couldn't get the job

Tom couldn't get the job because of the fact that he was not confident during the in terview

4, I have to work extra hours since I want to help support my family

I have to work extra hours because of helping  support my family

5, As he is very talented , we adore him

because of his talented, we adore him.

6, We delayed the flight because the weather was bad

We delayed the flight because of the bad weather

7, I haven't finished my assignment yet because i don't have enough materials

I haven't finished my assignment yet because of the fact that i don't have enough materials

8 i feel atracted to her since her voice is very sweet

i feel atracted to her because of her sweet voice

9, she has to depend on us as she is an orphan.

she has to depend on us because of her orphanage

Mọi người giúp mình giải mấy câu này với nha, cảm ơn mọi người nhiều.1. The weather wasn't nice, so we didn't go on a picnic last year.=> Had..........................................................................................2.It's a pity you don't understand how I feel about you.=> If only........................................................................3. Please don't make so much noise.=> Would you...
Đọc tiếp

Mọi người giúp mình giải mấy câu này với nha, cảm ơn mọi người nhiều.

1. The weather wasn't nice, so we didn't go on a picnic last year.

=> Had..........................................................................................

2.It's a pity you don't understand how I feel about you.

=> If only........................................................................

3. Please don't make so much noise.

=> Would you mind....................................................................

4. We didn't turn on the TV because the programs were very boring.

=> The programs.................................................................................

5.We don't find it difficult to live in a big city any more.

=>We are......................................................................

6. When did you start using this computer?

=>How long..................................................................................

7. The test was so difficult that we couldn't finish it.

=> So......................................................................................

8. '' I'm awfully sorry, Carol, but I've broken your watch,'' said Jim.

=> Jim apologized...........................................................................

9. She was absent from class yesterday because she was sick.

=>On account.................................................................................

10. Will you please show me the way to Tan Loi High School?

=> Do you fancy............................................................................

 

 

2
27 tháng 7 2016

- =="" Chịu ~

15 tháng 10 2017

1. Sử dụng cấu trúc đảo của câu điều kiện loại 3:

Had the weather been nice, we will have gone on a picnic last year.

2. Cách viết khác của wish ở tương lai:

If only you undertand how I feel about you.

3. Phủ định của would you mind:

Would you mind not making so much noise

4. Dùng so thay cho beacuse:

The programs were very boring, so we didn't turn on the TV.

5. Dùng not able( nhớ bỏ any more):

We are not able to live in a big city.

6. Dùng thì htht:

How long have you used this computer?

7. Câu đảo của so/such:

So difficult was the test that.....

8. Cấu trúc đặc biệt của said( câu đặc biệt của câu gián tiếp):

Jim apologized Carol for having broken her watch.

9. Cấu trúc khác của beacuse of:

On account of being sick, she was absent from class yesterday.

10. Fancy + Ving:

Do you fancy showing me the way....

I. Passive voice ( viết câu bị động) 1.A lot of things must be done to clean up this river. 2.That course hasn't been taught by Professor River this semester. 3. My house isn't painting because it is raining. 4. This paper is read by millions of people every day. 5. has the date of the meeting been changed? 6. This kind of work has never been done by Maria before. 7. That problem wasn't referred to at the last meeting. 8.My money is stolen from my purse this morning. 9. Money...
Đọc tiếp

I. Passive voice ( viết câu bị động)

1.A lot of things must be done to clean up this river.

2.That course hasn't been taught by Professor River this semester.

3. My house isn't painting because it is raining.

4. This paper is read by millions of people every day.

5. has the date of the meeting been changed?

6. This kind of work has never been done by Maria before.

7. That problem wasn't referred to at the last meeting.

8.My money is stolen from my purse this morning.

9. Money is usually changed at that bank.

10. I was taken to school by my father every day when I was small.

II.If clause (type 3)

1. We got to the station in time to catch the train. If we _______ (miss) it, we_______(be) late for the meeting.

2.I took a taxi to the hotel but the traffic was very bad. It_____(be)quicker if I _____(walk).

3.if she (not/fail)_____one of her final exams she wouldn't have had to spend part of the summer in college.

4.Mary and I weren't able to go on a honeymoon. We(can/go)______away if my father(not/get sick)______.

5. The accident was your fault. If you (drive)____more carefully, it (not happen)____.

6. If you had wored harder, you (pass)_____ you final exam.

7.It's good that you reminded me about Ann's birthday. I (forget)______if you (not reminded)______me.

8.If you (not ignore)______my advice, you ( not get into) _______ trouble yesterday morning.

9. If you (tell)______ me what was going to happen, I ( never do)_______such a foolish thing.

10.I(not invite)_______ John to the party if I (know)____ that you and he didn't get along well with each other.

11.I didn't go into busines with Sam. If I (go)______ into business with him, I (become)________ a success.

12. I got wet because I didn't take my umbrella. However, I (not/get wet)_____ if I (remember) _______to take my umbrella.

13.I'm doing the test very well now. I (not/do)_____ the test well if I (not/revise)______ thoroughly last night.

14.I'm broke, but I (have)_____ plenty of money now if I (not/spend)______ so much yesterday.

15. The view was wonderful. If I (have)______ a camera, I (take)_____some photos.

* Viết câu

16. He didn't prepare for the interview, so he didn't get the job.

17.we can home from our holiday early because we ram out of money.

18. I went to bed late. In the morning I felt tired.

19.The house didn't burn down because the fire brigade came immediately.

20.we left the party late. So we couldn't get a bus.

21. I took the job because I didn't know how difficult it was.

22. The woman didn't die because she received immediate medical attention.

23. Ann didn't pass the entrance examination, so she wasn't admitted to the university.

24. There was a test yesterday. You didn't know that, so you didn't study.

25.you got into so much trouble because you didn't listen to me.

26. The men were wearing protective clothing, so they were all quite safe.

27. It was raining yesterday afternoon,so I didn't go for a walk.

28. Rita is exhausted today because she didn't get any sleep last night.

29. Bob left his wallet at home this morninng, and how he dosen't have any money for lunch.

30.Joe got a ticket because he was driving too fast.

0
18 tháng 8 2018

1.study

2.is

3.don't like

4.will have

5.doesn't hurry

6.will give

7.will turn

8.tell

9.don't believe

10.won't let

18 tháng 8 2018

1. If you ( study ) ........study....... hard , you will pass the written examination

2. If the weather ( be ) ......is..... fine , we will go for a picnic

3. If you ( not like ) ......don't like......... it , I'll bring you another

4. They ( have ) ........will have....... a lot of fun if they come there

5. If she ( not hurry ) .....doesn't hurry..... , she will miss the bus

6. If I see him , I ( give ) .....will give....... him a lift

7. Ice ( turn ) ......will turn...... into water if you heat it

8. If you see him , ( tell ) ........tell....... him to ring me up

9. If you ( not believe ) ......don't believe..... what I said , ask your mother

10. If you come here , they ( not let ) ............won't let....... you in

1)The weather forecast was inaccurate ,so we didn't take the right precaution. -Had.................................................................................. 2)You must speak slowly or he'll not be able to understand you. -Unless............................................................... 3)Do as I tell you 'll regret about it. -Unless.............................................. 6)Mary didn't work hard enough. She failed in her exams. -If...
Đọc tiếp

1)The weather forecast was inaccurate ,so we didn't take the right precaution.

-Had..................................................................................

2)You must speak slowly or he'll not be able to understand you.

-Unless...............................................................

3)Do as I tell you 'll regret about it.

-Unless..............................................

6)Mary didn't work hard enough. She failed in her exams.

-If mary....................................................

7)But for his help , I would have gone bankrupt.

-If....................................................................

8)We got lost because we didn't have a map.

-If we.....................................................

9)You may get hungry on the train , so take some sandwiches.

-In care.....................................................................

10)If there is an emergency, ring this number .

-In................................................

11)I'm having a lot of trouble now because I lost my passport last week.

-If..............................................................................

12)I only made that terrible mistake because I wasn't thinking.

-If I.................................................

13)Your car might break down on the rough mountain road, so take plenty of spare parts.

-In care............................................................

14)It was his incompetence which led to their capture.

-If.................................................................

15)I only bought the dog because my children wanted a pet.

-If....................................................................

16)Without this treatment, the patient would have died.

-If he................................................................

17)In the event of nuclear wearpons being used ,we are doomed.

-If it should............................................................................

18)Mr.Miller lost his job because he was late every day.

-If...............................................

19)If I had known she was sick , I would have visited her.

-Had........................................................

20)The only thing that prevented the passing of the bill was the death of the Prime Minister.

-Had it not...............................................................

21)If ask me in advance , I'll be willing to work orvertime.

-Provided that.................................

22)You'd better not touch that switch.

-If I.......................................

1
18 tháng 8 2017

1)The weather forecast was inaccurate ,so we didn't take the right precaution.

-Had the weather forecast not been inaccurate , we would have taken the right precaution.

2)You must speak slowly or he'll not be able to understand you.

-Unless you speak slowly ,he'll not be able to understand you.

3)Do as I tell or you 'll regret about it.

-Unless you do as I tell, you 'll regret about it.

6)Mary didn't work hard enough. She failed in her exams.

-If mary had worked hard enough,she wouldn't have failed in her exams.

7)But for his help , I would have gone bankrupt.

-If. he hadn't helped, I would have gone bankrupt.

8)We got lost because we didn't have a map.

-If we had had a map, we would not have got lost

9)You may get hungry on the train , so take some sandwiches.

-In case you get hungry on the train , take some sandwiches.

10)If there is an emergency, ring this number .

-In case of emergency, ring this number .

11)I'm having a lot of trouble now because I lost my passport last week.

-If i hadn't lost my passport last week, i wouldn't have a lot of trouble now

12)I only made that terrible mistake because I wasn't thinking.

-If I had been thinking, i wouldn't have made that terrible mistake

13)Your car might break down on the rough mountain road, so take plenty of spare parts.

-In case your car break down on the rough mountain road, take plenty of spare parts.

14)It was his incompetence which led to their capture.

-If he hadn't been incompetent, they wouldn't have been captured

15)I only bought the dog because my children wanted a pet.

-If my children hadn't wanted a pet, I wouldn't have bought the dog

16)Without this treatment, the patient would have died.

-If he hadn't been treated, the patient would have died.

17)In the event of nuclear wearpons being used ,we are doomed.

-If it should happen that nuclear weapons are used, we are all doomed.

18)Mr.Miller lost his job because he was late every day.

-If Mr.Miller hadn't been late everyday, he wouldn't have lost his job

19)If I had known she was sick , I would have visited her.

-Had i known she was sick , I would have visited her.

20)The only thing that prevented the passing of the bill was the death of the Prime Minister.

-Had it not been for the death of the Prime Minister, the bill would have passed

21)If ask me in advance , I'll be willing to work orvertime.

-Provided that you ask me in advance , I'll be willing to work orvertime.

22)You'd better not touch that switch.

-If I were you, i wouldn't touch that switch.