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. . 2. Because Tom is out, you don’t see him at home. . 3. The boy wouldn’t go swimming unless the weather were nice. . 4. Everything was tidy, so I felt pleasant. . 5. We could have slept well unless the noise had been turned off. . 6. People hear you coming to my office. They phone me. . 7. Unless you lived in the dormitory, you could annoy me. . 8. Ngoc didn’t save my kids from hot water because Ngoc was busy meeting his customers. . 9. Unless the student goes to school early, he will be punished. . 10. Minh doesn’t get rid of his job because he loves working with computers. . 11. Unless last night your sister had gone home early, your mother could have waited for her. . 12. Because my mother wasn’t here, I didn’t ask for some money. . 13. The dogs can’t bite you unless you touch them. . 14. The books are expensive. I can’t buy them. . 15. I couldn’t think of myself unless I had some troubles. . 16. Harry Porter is an adventure film because it talks about the life and the discoveries of him. . 17. Her car wouldn’t have been broken yesterday unless she had driven fast. . 18. Hoa wrote to her parents. She wanted to greet them. . 19. Unless people knew you, they wouldn’t give you some precious information. . 20. Because these projects were out of date, the manager looked uncomfortable. . 21. Unless the young girl stops smoking, she won’t be healthy. . 22. I don’t like cats because cats are fury. . 23. Unless ten years ago they had lived in USA, they couldn’t have been the citizens in this country. . 24. Tom didn’t join the camping. I couldn’t persuade him to go with us. . 25. People can’t swim unless they study how to swim. . 26. Anne doesn’t attend the party because she wants to be alone. . 27. This department couldn’t be destroyed unless it built carefully. . 28. Susan agreed to go swimming because she liked water. . 29. Yesterday, I could have been injured unless I had seen a big container in the street. . 30. Sports make people healthy, so they do exercise every morning. . 31. Unless you were me, you couldn’t understand me. . 32. We are the world. We can co - operate one another. . 33. Unless this man is a driver, he can’t help you move by car. . 34. Dannis isn’t at home because he is on business. . 35. Unless they had been on the phone last night, they couldn’t have known the big secrets. . 36. Because man is the first person on Earth, he discovers the earth by hands and brain. . 37. You can’t join the club unless you are sick. . 38. Our picnic was passed easily because my mother helped me. . 39. Unless he refused everything, he would lose his family. . 40. Anne carried out a plan. Her family admired her so much. . 41. Unless I saved my money, someone would take it. . 42. Because she wasn’t tired, she could go on running. . 43. Linda can’t do her homework unless she is free. . 44. Richard played piano well, so everyone clapped their hands. . . 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. 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