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1、-*if条件句讲解及练习从句与现 在事 实相 反过去式（be用 were）主句would/should/could/might+ do与过 去事 实相 反过去完成would/should/could/might + have done与将should来事实相(were to)+动词原would/should/could/might + doIf I were you, I would not let out the secret.如果我是你的话，我不会泄露这个 秘密的。If I knew his new address, I would tell you.如果我知道他的新地址，我会告诉 你的。
2、If he studied harder, he would pass the exam.如果他学习再努力点的话，他会通过考试的。If we had made fuller preparation, we should have won the game.如果我们做了更充分的准备的话，我们肯定就赢了这场比赛。If you had taken my advice, you wouldn t havebeen late for the meeting.如果你听了我的建议，你开会就不 会迟到了。If she were to/should come, I would tell her the secr
3、et.万一她来的话，我会告诉她这个秘 密。（ 2）省略if 的虚拟条件句在含有 were, had, 或者 should 等 词的虚拟条件句中，可以省略if, 将 were, had 或者 should 这些助动词放在句首。 如：Were I you, I would not let out the secret.Had we made fuller preparation, we should have won the game.Had you taken my advice, you wouldn t have been late for the meeting.Should she co
4、me, I would tell her the secret.高一语法练习（四）预测、if 条件句及虚拟语气一、单项选择1. If I where he lived, I a note to him.A. know, would have sentB. had known, would have sentC. know, would sendD. knew, would have sent2. Mary is ill today. If she ,*she absent from school.A. were not il l; wouldn t be B. had been ill; wo
5、uldn t have been C. had been ill; should have been D. hadn t been ill; could be3. He acted as if he everything in the world.A. knewB. knowsC. has known D. wont know4. If you had enough money, what ?A. will you buyB. would you buyC. would you have boughtD. will you have bought5. If Mr. Young with jus
6、tice,he such a wrong thing.A. were treated; wouldn t doB. had been treated; wouldnh avtedoneC. were treated; wouldn t have doneD. had been treated; wouldn t do6. What if there nolight during the day?A. will happen; wasB. would happen; isC. happens; wereD. would happen; were7. The spokesman acted tha
7、t way as if he anything about the accidentbut actually he did.A. doesn t hearB. didn t hearC. haven t heardD. hadn t heard. If itnot for the fact thatyou ill now, I would surely punish-*you.A. is; areB. were; wereC. were; are D. was; were9. Many Chinese movie stars now have given up their Chinese na
8、tionality. If I were them, I that.A. shouldn t doB. didn t doC. hadn t doneD. won t do10. I want to get back by 5 olocc kif .A. likely B. canC. possible D. probable11. It seems as if it alreadysummer now but it is only February.A. is B. wasC. were D. had been12. If Henry had not pulled his cap low o
9、ver his brow, he by thepolice.A. might be recognizedB. might have been recognizedC. would have recognizedD. was to have been recognized13. There is a ring at the door. That be the postman, I suppose.A. willB. wouldC. is going to D. was going to14. Look at the dark clouds there be a storm.A. willB. m
10、ust have beenC. is going to D. would15. Why are you taking the pictures down? I the wall.A. paintB. have just painted C. am going to paint D. will have painted16. Can I stay at home tomorrow? Yes, you can if it.A. will snowB. is going to snowC. snowsD. snowed17. I don tknow if he thisafternoon. But
11、if he , I will tell you.A. will come; will do;B. comes; will doC. will come; doesD. comes; doesI thought I asked you to fixthe radio. Oh, I msorry. I it*right away.A. am to doB. will doC. was about to doD. am going to do19. The WTO can tlive up to its name it does not include acountry that is home t
12、o one fifth of mankind.A. as long as B. whetherC. ifD. even though20. Ask him to ring me up if you him.A. seeB. sawC. would seeD. will see21. It so late. I don t think hecome.A. wouldB. shouldC. is going to D. shall22. If people polluting the air,animals and plants will die soon.A. don t stopB. didn
13、 t stopC. shall not stopD. haven t stopped23. If you an interesting dayout, the Science Museum.A. want; visitingB. want; visitC. want to; visitD. wanting; visit24. If the pure water is heated to 100 centigrade degrees, it boil.A. is going to B. will C. would D. is to25. Is a dictionary available, so
14、, where?A. if B. if is*C. and ifD. and if is.、26.问题了。27.28.他了。29.子似的。30.朋友一样。翻译句子要是我哥哥在这儿，一切都没 如果下雨，庄稼就得救了。如果你昨天早点来，你就碰见 他那样对待我，好像我是他儿 他们谈话的样子好像是多年的31. 我想今天下午不会下雨。32. 你下星期把车借给我行吗？33. 发生的事我谁也不告诉。34. 我们不准备在那里多呆。35. 我难受极了，我想我要生病了。Keys:1 5 BAABB 6 10 DDCAC11 15 CBACC 16 20 CCBCA21 25 CABBC26. If my brot
15、her were here, everything would be all right.27. If it should rain, the crops would be saved.28. If youhad come earlieryesterday, you would (might) have met him.29. He treats me as if I were his son.30. They are talking as if they had been friends for many years.31. I don tthink it will rain this afternoon.32. Will you lend me the car next week?33. I won t tell anybody what happened.34. We are not going to stay there long.35. I feel terrible. I think I m gointo be sick.