UNLESS (TRỪ KHI) = IF ..... NOT (NẾU KHÔNG)
CÔNG DỤNG CÔNG THỨC CỦA
UNLESS
CÔNG THỨC CỦA
MỆNH ĐỀ IF (PHỤ)
- unless = if ... not
- unless chỉ dùng để thay thế mệnh đề phụ
trong câu điều kiện, mệnh đề chính không đổi.
1. Unless S + V1/s(es) ↔ If S + don’t / doesn’t +
Vo
2. Unless S + am, is, are ↔ If S + am, is, are + not
3. Unless S + V2/ ed ↔ If S + didn’t + Vo
4. Unless S + were ↔ If S + weren’t
5. Unless S + had V3/ed ↔ If S + hadn’t V3/ed
6. Unless S + had been ↔ If S + hadn’t been
Examples :
1. Unless you stay at your bed, you will be punished.
If you don’t stay at your bed, you will be punished.
2. Unless she drinks water, she will feel thirsty.
If she doesn’t drink beer, she will feel thirsty.
3. Unless they were absent now, they would meet the head master.
If they weren’t absent now, they would meet the head master.
4. Unless he cleaned up the car now, his boss could ask him to do this.
If he didn’t clean up the car now, his boss could ask him to do this.
5. Unless you had stayed at home yesterday, you wouldn’t have enjoyed a delicious meal.
If you hadn’t stayed at home yesterday, you wouldn’t have enjoyed a delicious meal.
6. Unless he had been busy last night, he could have met his friends.
If he hadn’t been busy last night, he could have met his friends.
Rewrite the statements by using the conditional sentences:
1. You can’t run fast unless you try your best.
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17. Her car wouldn’t have been broken yesterday unless she had driven fast.
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18. Hoa wrote to her parents. She wanted to greet them.
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19. Unless people knew you, they wouldn’t give you some precious information.
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20. Because these projects were out of date, the manager looked uncomfortable.
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21. Unless the young girl stops smoking, she won’t be healthy.
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22. I don’t like cats because cats are fury.
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23. Unless ten years ago they had lived in USA, they couldn’t have been the citizens in this country.
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24. Tom didn’t join the camping. I couldn’t persuade him to go with us.
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25. People can’t swim unless they study how to swim.
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26. Anne doesn’t attend the party because she wants to be alone.
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27. This department couldn’t be destroyed unless it built carefully.
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28. Susan agreed to go swimming because she liked water.
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29. Yesterday, I could have been injured unless I had seen a big container in the street.
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30. Sports make people healthy, so they do exercise every morning.
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31. Unless you were me, you couldn’t understand me.
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