if條件句講解及練習(xí)

1、if條件句講解及練習(xí)從句主句與現(xiàn)在事實相反過去式（be 用were）would/should/could/might+ do與過去事實相反過去完成式would/should/could/might + have done與將來事實相反should (were to) +動詞原形would/should/could/might + doIf I were you, I would not let out the secret. 如果我是你的話，我不會泄露這個秘密的。If I knew his new address, I would tell you.如果我知道他的新地址，我會告訴你的。If h

2、e studied harder, he would pass the exam.如果他學(xué)習(xí)再努力點的話，他會通過考試的。If we had made fuller preparation, we should have won the game. 如果我們做了更充分的準(zhǔn)備的話，我們肯定就贏了這場比賽。If you had taken my advice, you wouldnt have been late for the meeting.如果你聽了我的建議，你開會就不會遲到了。If she were to/should come, I would tell her the secret.萬

3、一她來的話，我會告訴她這個秘密。（2）省略if的虛擬條件句在含有were, had, 或者should 等詞的虛擬條件句中，可以省略if, 將were, had或者should這些助動詞放在句首。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 wouldnt have been late for the meeting. Should she come, I would te

4、ll her the secret.高一語法練習(xí)（四）預(yù)測、if條件句及虛擬語氣一、單項選擇1. If I _ where he lived, I _ a note to him.A. know, would have sentB. had known, would have sentC. know, would send D. knew, would have sent2. Mary is ill today. If she _, she _ absent from school.A. were not ill; wouldnt be B. had been ill; wouldnt hav

5、e beenC. had been ill; should have been D. hadnt been ill; could be3. He acted as if he _ everything in the world.A. knew B. knows C. has known D. won't know4. If you had enough money, what _?A. will you buy B. would you buyC. would you have boughtD. will you have bought5. If Mr. Young _ with ju

6、stice, he _ such a wrong thing.A. were treated; wouldnt doB. had been treated; wouldnt have doneC. were treated; wouldnt have doneD. had been treated; wouldnt do6. What _ if there _ no light during the day?A. will happen; wasB. would happen; isC. happens; were D. would happen; were7. The spokesman a

7、cted that way as if he _ anything about the accident but actually he did.A. doesnt hear B. didnt hear C. havent heard D. hadnt heard8. If it _ not for the fact that you _ ill now, I would surely punish you.A. is; are B. were; were C. were; are D. was; were9. Many Chinese movie stars now have given u

8、p their Chinese nationality. If I were them, I _ that.A. shouldnt do B. didnt do C. hadnt done D. wont do10. I want to get back by 5 oclock if _.A. likely B. can C. possible D. probable11. It seems as if it _ already summer now but it is only February.A. is B. wasC. were D. had been12. If Henry had

9、not pulled his cap low over his brow, he _ by the police.A. might be recognized B. might have been recognizedC. would have recognized D. was to have been recognized13. There is a ring at the door. That _ be the postman, I suppose.A. will B. wouldC. is going toD. was going to14. Look at the dark clou

10、dsthere _ be a storm.A. willB. must have beenC. is going toD. would15. Why are you taking the pictures down?I _ the wall.A. paintB. have just paintedC. am going to paint D. will have painted16. Can I stay at home tomorrow?Yes, you can if it_.A. will snow B. is going to snowC. snows D. snowed17. I do

11、nt know if he _ this afternoon. But if he _, I will tell you.A. will come; will do; B. comes; will doC. will come; does D. comes; does18. I thought I asked you to fix the radio.Oh, Im sorry. I _ it right away.A. am to do B. will doC. was about to doD. am going to do19. The WTO cant live up to its na

12、me _ it does not include a country that is home to one fifth of mankind.A. as long as B. whether C. if D. even though20. Ask him to ring me up if you _ him.A. see B. saw C. would see D. will see21. Its so late. I dont think he _ come.A. would B. should C. is going to D. shall22. If people _ pollutin

13、g the air, animals and plants will die soon.A. dont stop B. didnt stop C. shall not stopD. havent stopped23. If you _ an interesting day out, _ the Science Museum.A. want; visiting B. want; visitC. want to; visit D. wanting; visit24. If the pure water is heated to 100 centigrade degrees, it _ boil.A

14、. is going to B. will C. would D. is to25. Is a dictionary available, _ so, where?A. if B. if is C. and if D. and if is二、翻譯句子26. 要是我哥哥在這兒，一切都沒問題了。27. 如果下雨，莊稼就得救了。28. 如果你昨天早點來，你就碰見他了。29. 他那樣對待我，好像我是他兒子似的。30. 他們談話的樣子好像是多年的朋友一樣。31. 我想今天下午不會下雨。32. 你下星期把車借給我行嗎？33. 發(fā)生的事我誰也不告訴。34. 我們不準(zhǔn)備在那里多呆。35. 我難受極了，我想我要

15、生病了。Keys:15 BAABB 610 DDCAC 1115 CBACC 1620 CCBCA2125 CABBC26. If my brother were here, everything would be all right.27. If it should rain, the crops would be saved.28. If you had come earlier yesterday, you would (might) have met him.29. He treats me as if I were his son.30. They are talking as if they had be