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1. Nam is so fat because he eats so much chocolates.
_If Nam didn't eat so much chocolates, he wouldn't so fat.
2. We dont go on the trip because the weather is bad.
_ If the weather wasn't bad, we could go on the trip.
3. They don't go to the concert because they have an E test.
_ If they had an E test, they couldn't go to the concert.
4. He can't have the picnic because it is raining.
_ If it rained , he wouldn't have the picnic.
5. It rained yesterday, so we didn' t play soccer.
_ If it hadn't rained yesterday, we wouldn't have played soccer.
6. He ate a lot of chocolates, so he was very fat.
_ If he hadn't eaten a lot of chocolates, he wouldn't have been very fat.
7. They got up late, so they were late for work.
_ If they hadn't gotten up late, they wouldn't have been late for work.
8. Susan felf sick because she ate four cream cakes.
_ If Susan hadn't eaten four cream cakes, Susan wouldn't have felt sick
9. You can't visit Moscow unless you get a visa.
_ If you get a visa, you could visit Moscow.
10. He doesn't get any information because he doesn't phone immediately.
_ If he phoned immediately, he would get some information.
32. If you want my advice you would forget about buying a new house.
_ If I were you ,I would notbuy a new house
33. The accident happened because the train driver ignored a warning light
_ If the train driver had not ignored a warning light, The accident would not have happened
34. We couldn't contact him because he gave us the wrong number.
_ If he gave us the true number , we could contact him.
35. They didn't follow the map, so they got lost.
_ If they had followed the map, they would not have got lost
36. I didn't know you were coming, so I didn't wait for you.
_ If I knew you
37. You failed the exam because you didn't study hard.
_ If you had studied hard, you would not have failed the exam
16. Jim didn' t lend me any money, so I was unable to buy the car.
_ If Jim lent me money , I could buy the car.
17. The temperature didn't fall below zero last night, so the crops weren't damaged.
_ If the temperature fell below zero last night, the crops would damaged.
18. Joan will not stay at school because she doesn't find a job before september.
_ If Joan found a job before september, she would stay at school .
19. Mary didn't work hard enough, she failed the exam.
_ If Mary worked hard , she would final the exam.
20. You don't get a visa, you can't visit the United state.
_ If you don't get a visa, you can't visit the United State.
21. Elizabeth got a bad cough because she started smoking cigarettes.
_ If Elizabeth din't start smoking cigarettes,she woudn't get a bad cough.
22. Mr Tom didn't prepare his speech carefully, so he did it very badly.
_ If he prepared his speech carefully , he could do it very well.
23. The gardener didn't water those plants yesterday, so they died.
_ If The gardener watered those plants yesterday,they wouldn't die.
24. Without the sun, there would be no kinds of energy.
_ If there were no the sun, there would be no kinds of energy.
25. We got lost because we didn't have a map.
_ If we had a map , we wouldn't get lost
26. He didn't study hard he failed in his examination.
_ If he studied hard , he could pass his examination.
27. I made that terrible mistake because I wasn't thinking.
_ If I thought ,I wouldn't make that terrible mistake.
28. I bought the dog because my children wanted a bet.
_ If my children didn't want a bet, Iwouldn't buy the dog
29. Mr Mill lost his job because he was late everyday.
_ If Mr Mill weren't late everyday, he would lose his job.
30. If I had known she was sick, I would have visited her.
_ Had I known she was sick, I would have visited her.
31. You'd better not touch that switch.
_ If I tought that switch, I would hit you.
I. Rewrite the sentences，beginning as shown：
1. They don't have enough time so they cannot do me a favour.
If they had enough time, they could do me a favour.
2.I can't send you a postcard if you don't give me your address.
Unless you give me your address, I can't send you a postcard.
3. He lost his savings because he wasn't careful.
If he had been careful, he wouldn't have lost his savings.
4. If he were not so lazy，he would be more successful.
Were he not to be so lazy, he would be more successful.
5. If you had finished your work，you would have been awarded
Had you finished your work, you would have been awarded.
6. Bill never does anything unless you tell him what to do.
If you don't tell Bill what to do, he never does anything.
Make conditional sentences according to the facts provided
1) keep silent or you'll wake up the baby up
=> If you don't keep silen, you'll wake the baby up.
2) because you don't leave immediately i call not a policeman
=> If you leave immediately, I won't call a policeman.
3) i don't know her number ,so i don't ring her up.
=> If I knew her number, I could ring her up.
4) go right now or you'll be late for the train
=> If you don't go right now, you'll be late for the train.
5) i couldn't write to alice because i didn't know her address.
=> If I had known Alice's address, I could have written to her.
6) i don't know the answer, so i can't tell you.
=> If I knew the answer, I could tell you.
7) his friends were so late, so they missed the train
=> If his friends hadn't been so late, they'd not have missed the train.
8) today isn't sunday, so the pupils can't go swimming
=> If today were Sunday, the puplis could go swimming.
9) the chair is to heavy for him to movie.
=> If this chair wasn't too heavy, he could move it.
10) he had a flu because he went out in the train last night.
=> If he hadn't gone out in the rain last night, he wouldn't have a flu.
1) Keep silent or you'll wake the baby up.
-> If you don't keep silent, you'll wake the baby up.
2) Because you don't leave immediately, I call a policeman.
-> If you leave immediately, I won't call a policeman.
3) I don't know the number, so I don't ring her up.
-> If I knew the phone number, I would ring her up.
4) Go right now or you'll be late for the train.
-> If you don't go right now, you'll be late for the train.
5) I couldn't write to Alice beacuse I did't know her address
-> If I had known Alice's address, I could have written to her.
6) I don't know the answer, so I can't tell you.
-> If I knew the answer, I could tell you.
Chỉ làm được vậy thôii
Chúc bạn học tốt!
Tick đúng nha 
1) if you (heat).........ice, it (will turn).............into water
2) they couldn't help you because they were not here
Because of their absence, they couldn't help you
3) I can't go out because it is raining
Because of the rain, I can't go out
4) this book is interesting enough for me to read many times (so)
this book is so interesting that i have read it many times
5) "he is readimg books in his room now", she said
she said he was readimg books in his room then
Câu If:
1) My mother buys that car for him. He will be happy.
--> If my mother buys that car for him,he will be happy
2) They don't buy that car because it is so expensive.
--> If that car weren't so expensive ,they would buy it
3) Mary is lazy, so she doesn't pass her exam.
--> If Mary weren't lazy ,he would pass her exam
4) The weather is very cold, and we won't take a bath.
--> If the weather weren't very cold,we would take a bath
5) She is so busy and she doesn't have dinner.
--> If she weren't so busy ,she would have dinner
6) Our teacher doesn't come to class because he does something.
--> If our teacher didn't do sth,she would come to class
7) I don't enjoy the film because it is not exciting.
--> If the film were exciting,i would enjoy it
8) Because they come here late, they don't see Mr. John.
--> If they didn't come here late,they would see mr.john
9) My sister finishes the test easily because she is very intelligent.
--> If my sister weren't very intelligent ,she wouldn't finish the test easily
10) My father is busy and he never watches TV.
--> If my father weren't busy,he would watch TV
11) Go out or you will be bitten.
--> If you don't go out,you will be bitten
12) Don't be late or you fail in the exam.
--> If you are late,you will fail in the exam
13) You won't win because he doesn't advised you.
--> If he advised you,you would win
14) Mary stays at home because she is sick.
--> If Mary weren't sick,she wouldn't stay at home
1 If he passed his exam, his parents were very happy
2 If they think gas cheaper than electricity, they use it
3 If his friends missed the train, they were so late
4 If I made a promise, I couldn't tell you the truth
1.his parents were very happy because he passed his exam
=> If he hadn't passed his exam, his parents wouldn't have been happy
2.They use gas because they think it cheaper than electricity
=>If gas weren't cheaper than electricity, they wouldn't use it
3.His friends were so late, so they missed the train
=>If his friends hadn't been so late, they wouldn't have missed the train
4.I couldn't tell you the truth because I made a promise
=>If I hadn't made a promise, I could have told you the truth