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Exercise 1:
- I won't go to school unless I feel better.
- Tony won't walk to you unless you question him.
- You'll be cold unless you put your overcoat on.
- You will fail the exam unless you work hard.
- You'll get a cold unless you keep your feet dry.
- I won't go to the party unless you go.
- I'll miss my flight unless I leave now.
- I can't send you a postcard unless you give me your address.
- I can't build a school for the poor unless I win a big lottery.
- I will call the police unless you leave me alone.

correct the verb form
1,if you(go)..........go............away,please write to me
2,if you (be)............are...........in,i should have given it to you
3,if he(he).............has..........another cake,he will be sick
4,i (not do).........wouldn't do............that if i (be)......were............you
5,if he(take).............takes..........my advice everything can go well
6,i would have come sooner if i (know)......have known...........you were here
7,he never does homework .if he (do).....didn't do............his homework he(not worry).....wouldn't worry............about his examination
8,it is too bad we lost the game.if you(play)....play..............for us ,we(win).........will win..........9,what you (do)........will you do.............if she refuses your invitation?
10,if today (be).........is..........sunday,we(go)...........will go......to the beach
11,unless they (pass)......pass......their examinations thay would join the army
12,you(be).........will be.............ill if you drink that water
13,if tom (go).......went..........to bed earlier he would not be so tired
14,had we known your address,we(write)......wrote..............you a letter
15if it is raining heavily,we (not go)........won't go.............for a donkey ride
16,if he (try).........tries...........hard,he 'll pass the examination
17,i could understand the frech teacher if she (speak)..........speaks........more slowly18,if she(not be)............haven't been.......busy,she would have come to the party
19,if i(finish).....finish.........the work in time i (go)........will go...................to the football game
20,if you(see).........see........mary today,please (ask)........ask...........her to call me

1. Why did you buy this paint? I (paint) …am going to paint………………………… my bedroom tomorrow.
2. It is 7.30 now. We (study) …are studying………………………… science in the class. At 8 o’clock, we (have) …………will have………………… a music class.
3. I () …………………………… English and literature. They are my favorite subjects. The other ones (be) …………is………………… awful.
4. Tomorrow (be )………will be……Sunday, so I (no, go) ………won't go…………………… to school.
5. I (come to visit) ……………………………my grandma this weekend. She (be)…………….ill.
6. How long ……………….your vacation (last)……………………? About two months.
What ……………………………………(you, do) during this vacation? I don’t know exactly. Maybe I (go)…………………..to Da Nang with my parents.
7. That hat makes him (look)…………………. Very funny.
8. At the moment, the children (be)……………….in the living room. Tom…………………(play ) the guitar while his sister (sing)……………………….
9. I am afraid I (not, be) …………………………… quite ready. Never mind. I (wait)……………….
10. He always (have) …………………… two sandwiches and an apple for lunch.
11. Now I (understand) …………………………… what you are trying (say)…………………………
12. Can you (swim)………………………….?
No, but I (learn)…………………………………my brother (teach)………………………………me at the moment.
1. Why did you buy this paint? I (paint) …………will paint………………… my bedroom tomorrow.
2. It is 7.30 now. We (study) …………are studying………………… science in the class. At 8 o’clock, we (have) ……………will hvae……………… a music class.
3. I () …………li ke………………… English and literature. They are my favorite subjects. The other ones (be) …………………are………… awful.
4. Tomorrow (be )………is……Sunday, so I (no, go) ………won't go…………………… to school.
5. I (come to visit) ……………will come to visit………………my grandma this weekend. She (be)……is……….ill.
6. How long ………will….your vacation (last)………last……………? About two months.
What ………………will you do………………(you, do) during this vacation? I don’t know exactly. Maybe I (go)………will go…………..to Da Nang with my parents.
7. That hat makes him (look)……look……………. Very funny.
8. At the moment, the children (be)………are……….in the living room. Tom……………is playing……(play ) the guitar while his sister (sing)………is singing……………….
9. I am afraid I (not, be) ……won't be………… quite ready. Never mind. I (wait)……will wait………….
10. He always (have) ………has…………… two sandwiches and an apple for lunch.
11. Now I (understand) …am understanding………… what you are trying (say)………to say……………
12. Can you (swim)…swim…………….?
No, but I (learn)………learn……………my brother (teach)………is teaching………………me at the moment.

I)Conditional sentences
1.If the earth suddenly (stop)..stopped. spinning we all (fly)would fly....off it.
2.If you (smoke).smoke..in a non-smoking compartment the other passengers (object).will object...
3.(your parents/not/be)..Weren't your parents......proud if they could see you now?
4.I'm broke,but I (have)..would have...plenty of money now If I (not/spend).hadn't spend...so much yesterday
5.If we (work)worked...all right, we (finish).would finish...in time; but we have no intention of doing it
6.If we (have)..had...a submarine now, we (use).would use... it to investigate the seabed
7.Were he ten years younger, he (take)...would take...part in the voyage around the world
8.Should you come late, they (not,let)..won't let...you in
9.He might get rid of his cough if he (not smoke).DIND'T SMOKE...so much
10.If someone (give)..GAVE... you a boat what WOULD you (do)..DO .?
11.Water (freeze).WILL FREEZE...if the temperature falls below zero
12.I (warn).WOULD HAVE WARNED...you if I had seen you last week
13.He always says hello if he (see)..SEES.you
14.What would you do if he (resign)..RESIGNED ...tomorrow?
15.I wouldn't have seen so upset if Judy (write).HAD WRITTEN..to me earlier
16.Shout if you (see)..SEE..anything unusually
17.The engine starts if you (turn).TURN..this key
18. If he weren't so bad temperature, his wife (not leave)..WOULDN'T LEAVE...him so soon after the marriage
19.What (you/say)..WOULD YOU SAY.....if I offered you a job?
20.I can't help feeling sorry for the hungry children. If only there (be)..WERE...peace in the world
21.Were I to become president, my first act(be).WOULD BE... to help the poor
22.I feel as if my head(be)..WERE...on fire now, doctor.

1: Rewrite each sentence beginning as shown, so that the meaning remains the same.
1. The lions are fed at 3 pm every day
2. If we had had a map, we wouldn't have got lost
3. I would rather you delivered the sofa on Friday.
4. It was such a low bridge that the bus couldn't go under it.
5. What a silly thing to say!
6. There isn't any tea left.
7. I haven't seen him since I was a student.
8. Susan was so excited that she couldn't sleep.
9. Robert has been out of job/ jobless/ unemployed for two years.
10. She will not complete the work unless she is paid extra/ if she is not paid extra.
2 Use the words in the brackets to combine the following sentences.
1. All the students love the principal because of his kindness.
2. I’m sorry for having forgotten the kets.
3. If I hadn’t seen it with my own eyes, I wouldn’t have believed it.
4. The house at the end of the street which has been empty for years has been sold.
5. I wish he took the doctor's advice.
AC1
1. The lions are fed at 3 pm every day
2. If we had had a map, we wouldn't have got lost
3. I would rather you delivered the sofa on Friday.
4. It was such a low bridge that the bus couldn't go under it.
5. What a silly thing to say!
6. There isn't any tea left.
7. I haven't seen him since I was a student.
8. Susan was so excited that she couldn't sleep.
9. Robert has been out of job/ jobless/ unemployed for two years.
10. She will not complete the work unless she is paid extra/ if she is not paid extra.

Complete the conditional sentences,using the given information:
1. the office may be closed, so Mark won't be able to get in
=> If the office is not closed, Mark will be able to get in.
2. the accident happened because the driver in front stopped suddenly
=> If the driver hadn't stopped suddenly, the accident wouldn't have happened.
3. you may want a chat , so just give me a ring
=> If you want a chat, just give me a ring.
4. unfortunately, i didn't have an umbrella and so i got very wet in the rain
=> If I had an umbrella, I wouldn't have got wet in the rain.
5. the airport was closed, so Sarah wasn't able to fly to Rome
=> If the airport hadn't been closed, Sarah would have been able to fly to Rome.
6. it is raining, so we won't finish the game
=> If it weren't raining, we would finish the game.
7. Carol didn't answer the phone because she was studying
=> If Carol hadn't been studying, she would have answer the phone.
8. People don't realise how important it is to conserve energy , so they do nothing about it
=> If people realise how important it is to conserve energy, they will do something about it.
Chúc bạn học tốt!
Complete the conditional sentences,using the given information:
1. the office may be closed, so Mark won't be able to get in
=> If the office is not closed, Mark will be able to get in.
2. the accident happened because the driver in front stopped suddenly
=> If the driver hadn't stopped suddenly, the accident wouldn't have happened.
3. you may want a chat , so just give me a ring
=> If you want a chat, just give me a ring.
4. unfortunately, i didn't have an umbrella and so i got very wet in the rain
=> If I had an umbrella, I wouldn't have got wet in the rain.
5. the airport was closed, so Sarah wasn't able to fly to Rome
=> If the airport hadn't been closed, Sarah would have been able to fly to Rome.
6. it is raining, so we won't finish the game
=> If it weren't raining, we would finish the game.
7. Carol didn't answer the phone because she was studying
=> If Carol hadn't been studying, she would have answer the phone.
8. People don't realise how important it is to conserve energy , so they do nothing about it
=> If people realise how important it is to conserve energy, they will do something about it.

I.Complete the sentences, using the given information.
1. I'm so busy, so I don't write to my friends regularly.
If I.........wasn't so busy, I could write to my friends regularly...................................
2. Sandra may arrive a bit early. She can help you get things ready.
If Sandra........ arrived a bit early she could help you get things ready...............................................
3. The office may be closed, so Mark won't be able to get it.
If the office......wasn't closed, mark would be able to get it.......................................................
4. It is raining, so we won't finish the game.
If it.........wasn't raining, we would finish the game...............................
II. Fill each blank with one suitable preposition
1. Lan is standing near the store and she is waiting....for...the bus.
2. I agree.....with.....you about that.
4. I like the weather...in......June
1. I'm So Busy, So I Don't Write To My Friends Regularly.
If I Were Not Busy, I Would Write To My Friends Regularly
2. Sandra May Arrive A Bit Early. She Can Help You Get Things Ready.
If Sandra Arrives A Bit Early, She Can Help You Get Things Ready.
3. The office may be closed, so Mark won't be able to get it.
If the office Is Not Closed, Mark Will Be Able To Get In
4. It is raining, so we won't finish the game.
If it If It Were Not Raining, We Would Finish The Game
II. Fill each blank with one suitable preposition
1. Lan is standing near the store and she is waiting....for...the bus.
2. I agree....with ......you about that.
4. I like the weather......of...June

I. Supply the correct form of the verb in brackets :
1.Hurry up or our favourite TV programme ( be).....WILL HAVE BEEN..... over long before we ( reach)....REACH....home.
2. If we don't hurry, all the tickets ( sell)..........WILL HAVE BEEN SOLD......by the time we get there.
3. The classroom is still very dirty. I don't think it ( clean)...HAVE BEEN CLEANED...
4. We (tell)......HAVE TOLD...... not to go out at night recently.
5.Thanks for your help! If you ( not help).........HADN'T HELPED.......... me, I (not pass).........WOULDN'T HAVE PASSED.... the exam.
6. HAVE you (be) ......BEEN...to the laboratory this week?
7.He was busy packing, for he said that he....HAS LEAVED...( leave) that night.
8. Hello,Pat. I ( phone)..HAVE PHONED ... to ask if you (do) ....HAD DONE.........anything this Saturday.
9. It is crucial that Dido (stop).......STOP.....using that equipment.
10. The house (build)....HAS BEEN BUILT.....for three months.
11. I avoided ( recognize)......BEING RECOGNIZED........ by my parents on the street.
12. At 6.30 last night,when I (have).....WAS HAVING....dinner, my friend ( phone)....PHONED.......me.
13.If the weather (be)......HAD BEEN..good, we ( go).........WOULD HAVE GONE.....to the beach last sunday.
14. Do you mind if I OPENED( open) the window?
II. Each sentence contains a mistake. Find and correct it:
1. This is the book that I buy at the store yesterday. ->.......................BOUGHT......................................................
2. Despite he is a good singer, he is not famous.->..........ALTHOUGH...................................................................
3. MR Hung is going to buy a new house, is he? ->............................ISN'T.................................................
4. If I am you, I would buy that expensive car. ->................WERE.............................................................
5. Could you mind telling me the way to the nearest restaurant? ->.........................WOULD.......................................
6.I'd prefer to do it on myself because other people make me nervous.->........................BY.....................................................
7. I read something about Tararino's new film on that magazine.->...........IN.....................................
8. Because there are less members present tonight than there were last night,we must wait until the next meeting to vote.->..................................MORE...........................................
9. A dictionary IS which I have wished to have for years.->........................IN.................................................
1. I didn’t eat lunch, and now I’m hungry.
If......…I had eaten lunch, I wouldn't be hungry now…………………………………………………………………………………….………………….
2. Bob left his wallet at home this morning, and now he doesn’t have money for lunch.
If.....Bob hadn't left his wallet at home this morning, he would have money for lunch. .……………………………………………………………………………………….………………….
3. Bruce is always daydreaming, and so he never gets his work done.
If......Bruce weren't always daydreaming, he would get his work done. ……………………………………………………………………………………….………………….
4. My muscles hurt today because I played basketball for three hours last night.
If......……I hadn't played basketball for three hours last night., My muscles wouldn't hurt today ………………………………………………………………………………….………………….
5. I couldn’t hear what you said because the band was playing so loud.
If......……the band hadn't been playing soloud, I could have heard what you said………………………………………………………………………………….………………….