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1 he can not go out because he has to study for his exam
=> if he doesn't have to study for the exam, he can go out.
2 she is lazy so she can not pass the exam
=> if she isn't lazy, she can pass the exam.
3 he will pay me tonight , i will have enough money to buy a car
=> if he pays me tonight, I will have enough money to buy a car.
4 he smokes too much , that is why he can not get rid of his cough
=>if he doesn't smoke too much, he can not get rid of his cough.
5 she is very shy , so she does not enjoy the pary
=>if she isn't shy, she will enjoy the party.
(Tớ làm 5 câu thôi, mấy câu sau cậu tự làm nhé)
1) It is late now; I don't think Ann will come to see us
-> I would be surprised if Ann came to see us.
2)We don't go on holiday because we don't have enough money
-> If we had enough money, we would go on holiday.
3) Do these exercises more carefully or you will fail the exams
-> Unless you do these exercises more carefully, you will fail the exams.
4) I do not know the answer so I can not tell you
-> If I knew the answer, I could tell you.
5) She can't apply for the job because she doesn't know French
-> If she knew French, she could apply for the job.
6) if she didn't come here now, we'd come back home
-> Unless she came here now, we'd come back home.
7) Be careful or you will not be able to get the job
-> Unless you are careful, you will be able to get the job.
8) The trees will die unless it rains soon
-> If it doesn't rains soon, the trees will die.
viết lại câu sao cho nghĩa không đổi
1. I do not buy it because I do not have enough money
--> If I had enough money , i would buy it
2. I am búy now, so I can not help you
--> If I weren't buying now , i could help you
3. There will be a shortage of water unless it rains
--> If it doesn't rain , there will be a shortage of water
4. John is fat because she eat many chips
--> If she didn't eat many chips , she wouldn't be fat
5. I will only help you if you promise to try harder
--> Unless you promise to try harder , i won't help you
6. If it does not rain soon, the srops will be lost
--> Unless it rains soon , the crops will be lost
7. I am very tired so I can not concentrate properly
--> If i weren't tired , i could concentrate properly
8.We do not have a garden , so we do not grow our own vegetables
--> If we had a garden , we would grow our own vegetables
9. He does not give you good advice because he is not your true friend
--> If he were your true friend , he would giv you good advice
10. We come late becavuse the rain is so havely
--> If the rain weren;t so heavy , we wouldn't come late
viết lại câu sao cho nghĩa không đổi
1. I do not buy it because I do not have enough money
--> If I had enough money, I would buy it.
2. I am búy now, so I can not help you
--> If I wasn't busy now, I could help you.
3. There will be a shortage of water unless it rains
--> If it didn't rain, there would be a shortage of water.
4. John is fat because she eat many chips
--> If she didn't eat many chips, she wouldn't be fat.
5. I will only help you if you promise to try harder
--> Unless you promise to try harder, I will not help you.
6. If it does not rain soon, the srops will be lost
--> Unless it rains soon, the srops will be lost.
7. I am very tired so I can not concentrate properly
--> If I wasn't very tired, I could concentrate properly.
8.We do not have a garden , so we do not grow our own vegetables
--> If we had a garden, we would grow our own vegetables.
9. He does not give you good advice because he is not your true friend
--> If he was your true friend, he would give you good advice.
10. We come late becavuse the rain is so havely
--> If the rain wasn't so heavy, we wouldn't come late.
viết lại câu
1,i am sick today ,so i don't go to class
--> if I weren't sick today, I would go to class.
2,there isn't a river in my village.we can't go swimming
-->if there were a river in my village, we could go swimming.
3,i don't have enough money.i can't go swimming everyday
-->if I had enough money , I could go swimming everyday.
4,work harder or you won't pass the exam
-->if you work harder, you will pass the exam.
5,tom has so many accidents because he is so clumsy
-->if Tom weren't so clumsy, he wouldn't have so many accidents.
6,listen to the teacher please or you can't understand the lesson
-->if you don't listen to the teacher, you can't understand the lesson.
7,i think you should surf the internet for more in for mation
-->if I were you, I would surf internet for more information.
8,it is raining, so we can't finish the game
-->if it weren't raining, we could finish the game.
9,hurry up or you miss the bus
-->if you don't hurry up, you will miss the bus.
10,he doesn't get high marks because he is lazy
-->if he weren't lazy, he would get high marks.
11,the office may be closed,so mark won't be able to get in
-->if the office might not be closed, Mark could get in.
12,i don't know to control this machine
-->i wish I knew how to control this machine.
13,it started raining an hour ago
-->it has been raining for an hour
14,she last visited herparents last sunday
-->she has visited her parents since last Sunday.
15,i study engish badly
-->i wish I studied English better.
1. I haven't got money , so I'm not going on holiday
-> If I haven't got money , I am not going on holiday
2. He often gets bad marks because he is lazy
-> If he lazy , he will often get bad marks
3. Do it now , or you will not finish it on time
-> If you don't do it now, you won't finish it on time
4. Hurry up , or we will be late for the exam
-> If we are not hurry , We will be late for the exam
5. Be quiet , or you will not understand the lesson
-> If you are not be quiet , you will not understand the lesson
6. They do not understand you because you do not often talk to them
-> If you don't talk to them , they won't understand you
7. The office may be closed , so Mark won't be able to get in
-> If the office may be closed , Mark won't be able to get in
8. You can't look the work up because you haven't got a dictionary
-> If you haven't got a book , you can't look the work up
9. He didn't hurry , so he missed the train
-> If he đin't hurry , He would miss the train
10. We canceled our picnic because it rained very hard yesterday
-> If it rained very hard yesterday , we would cancele our picnic
11. I wasn't at home yesterday , I didn't see my old friends
-> If I didn't see my old friends , I would not at home yesterday
12. They don't behave themselves so their parents are not happy about that
-> If their parents are not happy about that, They don't behave themselves
13. She didn't say sorry so she was angry
-> If she was angry , she would not say sorry
14 . It raines last night so I didn't go to the barbecue
-> If I didn't go the the barbecue , It would rain last night
15. She doesn't play attention to her coooking so the food is horrible
-> If the food is horrible , She won't play attention to her cooking
16. The weather was very nice so we didn't go camping
-> If the weather was very nice , we wouldn't go camping
17. The computer broke down and I had to stop my work
-> If the computer broke down , I had stopped my work
18. She love him so she forgives him easily
-> If she love him , she will forgive him easily
Chúc bạn học tốt 
1. I haven't got money , so I'm not going on holiday
- If I had enough money I would go on holiday.
2. He often gets bad marks because he is lazy
-> If he isn't lazy, He will not get bad marks.
3. Do it now , or you will not finish it on time
-> If you don't do it now, you won't finish it on time.
4. Hurry up , or we will be late for the exam
-> If we don't hurry up, we will be late for the exam.
5. Be quiet , or you will not understand the lesson
-> If you weren't quite, you won't understand the lesson.
6. They do not understand you because you do not often talk to them
-> If you often talk to them, they will understand you.
7. The office may be closed , so Mark won't be able to get in
-> If the office are closed , Mark won't be able to get in.
8. You can't look the work up because you haven't got a dictionary
-> If I had a dictionary, I could look the word up.
9. He didn't hurry , so he missed the train
-> If he had hurried , he wouldn't have missed the train .
mấy câu nữa tối làm
1 if he will páy me tonight, i wil..........
2 if i ................................................
3 unless they invite me, i won't come
4 bỏ dấu phảy, đổi hai vế cho nhau
1. He will pay me tonight; I will have enough money to buy a car.
> If .....he pays me tonight, I will have enough money to buy a car.........................
2. I will get a work permit. I will stay for another month.
> If ........I get a work permit. I will stay for another month...................
3. I only come if they invite me.
> Unless ....they invite me, I won't come.....................
4. If I arrive at the office earlier than I do, please turn on the air-conditioner.
> Should I arrive at the office earlier than I do, please turn on the air-conditioner...............................
5. He died so young; otherwise, he would be a famous musician by now.
> Had ..he not died so young, he would be a famous musician by now..........................
6. The car breaks down so often because you don't take good care of it.
> Were I to take good care of the car, it wouldn't break down so often ................................
7. She got married at such an early age; otherwise, she would be at university now.
> Had .she not got married at such an early age, she would be at university now. ...............................
1. If you don't see that film, you'll be sorry.
>> unless you see that film, you'll be sorry.
2. If you don't take morning exercises, you will be weak .
>> Unless you take morning exercises, you will be weak .
3. You will ger lost if you don't take a map with you.
>> Unless you take a map with, you will get lost .
4. They will kill him if he doesn't tell them the truth.
>> Unless he tells them the truth, they will kill him.
5. If we don't protect the forests, the environments will be so destroyed.
>> Unless we protect the forests, the environments will be so destroyed.
6. I will wait for her if she calls me.
>> Unless she calls me, I will not wait for her.
Còn lại làm tương tự nhé :))
I. Put the verds in brackets into the correct forms:
1. If I (have) .have.... time, I will write to him.
2. If it's cold, I (need) .will need... a heavier coat
3. What are you going to do if you (have).have... a holiday?
4. If I meet Helen, I (give)..will give... her your messenger
5. If I can go tomorrow, I (let)...will let.. you know
6. If flowers don't get any water, they (die)..will die..
7. Don't come if they (not call)..don't call..you
8. If I didn't feel so tired, I (go)...would go. out with you.
9. I could repair the car if I (have).had... the right tools.
10. If she hadn't been ill yesterday, she (go).would have gone.... to work now.
II. Rewrite these sentences, beginning as shown, so that the meaning stays the same:
1. If you don't like this one, I'll bring you another.
=> Unless you like this one, I'll bring you another.
2. I'll only help you if you promise to try harder.
=> Unless you promise to try harder,. I won't help you
3. Unless you work hard, you will not fail the exam
=> If you don't work hard, you will not fail the exam
4. Stand up or you will be punished.
=> Unless you don't Stand up ,you will be punished.
5. Do your homework or you will get bad mark
=> If you don't Do your homework,you will get bad mark
III. Rewrite these sentences use "If"
1. I don't know enough about this machine, so I can't mend it myself.
=> If I knew enough about this machine, I could mend it myself.
2. I don't ride the bus to work every morning because it's always so crowed
=> If it weren't always so crowed, I would ride the bus to work every morning
3. The wwind is blowing hard, so I won't take the boat out for ride.
=> If The wwind wern't blowing hard, I would take the boat out for ride.
4. Nick can'r find the way because he doesn't have a map.
=> If Nick had a map,He could find the way
5. Susan felt sick because she ate many cream cake.
=> If susan hadn't eaten many crea, cake,she wouldn't have felt sick
6. Without this treatment, the patient would have died.
=> If it hadn't been for this treament, the patient would have died.
7. Those people weren't prepared to face the floods; therefore, the consequence was disastrous
=>If Those people had been prepared to face the floods; the consequence wouldn't have been disastrous
IV. Rewrite these sentences
1. The book was so expensive that I didn't buy it.
=> The book was too expensive for me to buy
2. He can touch the light because he's very tall
=> He is tall enough to touch the light
3. It is such good weather that they are going for picnic.
=> The weather is so good that they are going for picnic.
4. I didn't go and neither did my friend (either)
=> I didn't go and my friend didn't,either
1, If he didn't have to study for his exam, he could go out
2, If she weren't lazy, she could pass the exam
3, If he didn't smoke too much, he could get fid of his cough
4, If he pay me tonight, i would have enough money to buy a car
5, If she weren't very shy, she would enjoy the party
6, If i got a work permit, i would stay for another month
7, Câu này mình không biết chuyển thế nào ┐( ´ ～｀)┌
8, If i had the right change, we could get the ket
9, If you didn't study hard, you would pass the exam
10, If you weren't impatient, you would make mistakes
III.Conditional sentences
1.Be early or you will be punished=> If……you are early, you won't be punished…….
2.Be helpful and people will love you=>If …you are helpful, people will love you….
3.Study studiously or we can’t get good mark=>If… we study studioustly, we can get good mark……
4.Lan has to do a lot of homework,so she has stay at home=>If……lan didn't have to do a lot of homework, she wouldn't have stay at home…..
5.Nga doesn’t feel happy because she dosen’t study English well=>If…nga felt happy, she would study english well…
6.Unless the weather is good, we can’t go=>If…the weather isn't good, we can't go ..
7.If the boys doesn’t study well, he will fail=>If…the boys studied well, he wouldn't fail..
8.It doesn’t rain, so we don’t bring a umbrella=>If…it rained, we would bring a umbrella..
Chào em, em chú ý câu số 4.
Theo cô, ở đây đề bài có 1 chút vấn đề, nếu như mệnh đề chính là she has to stay at home thì chúng ta phải dùng câu điều kiện loại 2 vì nó diễn tả 1 điều không có thật ở hiện tại/tương lai.
Tạm dịch: Lan phải làm rất nhiều bài tập về nhà, nên cô ấy đã phải ở nhà.
=> Nếu cô ấy không phải làm nhiều bài tập về nhà thì cô ấy sẽ không phải ở nhà (thực tế là ngược lại).
=> If Lan didn't have to do a lot of homework, she wouldn't have to stay at home.
Chúc em học tốt và có những trải nghiệm tuyệt vời tại hoc24.vn!