1、虚拟条件句在英语中，语气是动词的一种形式，用来表示说话人的意图或态度。英语的语气有三种：_语气（表示所说的话是事实），_语气（表示所说的话是请求或命令）_语气（表示所说的话只是一种主观的愿望或假设或建议等）。如果所表示的条件是真实的，或者完全有可能实现的，叫真实条件句，主句和从句的谓语都用 陈述语气 。如果所表示的条件不可能实现或者实现的可能性很小时，叫非真实条件句，主句和从句的谓语要用 虚拟语气 。（1）含 if 的虚拟条件句从句 主句与现在事实相反与过去事实相反与将来事实相反练习： 1.If I _(be) you, I _(tell) them the truth. 如果我是你的话，我就
2、会把真相告诉他们。2.If I_(get) the information, I_(let) you know first. 如果我知道这个情况的话，我会第一个告诉你。3.If we_(have) enough money, we _(buy)the house. 如果我们有足够的钱的话，我们就买下那座房子了。4.If she _(come), what _(say) to her?万一她来了，我该怎么对她说呢？5.If you dont hurry, you_(be) late for school.（2）省略 if 的虚拟条件句在虚拟条件句中，如果有 were，had，或 should，就
3、可以省略 if，把这些助动词放在句首。练习： 改写下面句子，省略句中 if1.If I were you, I would tell them the truth. 2.If we had had enough money, we would have bought the house. 3.If she should come, what should I say to her?能力训练1. If I _ him yesterday，I _ him about it.A. saw; would ask B. had seen; would have asked C. had seen; wo
4、uld ask D. saw; would have asked2. What do you think would happen if there _ no light during the night?A. is B. will be C. were D. would be3. If her lawyer _ here last Sunday, he _ her from going.A. had been; would have prevented B. had been; would preventC. were; would prevent D. were; would have p
5、revented4. If it had not been for the liberation, no changes _ place in my hometown.A. would have taken B. would have been taken C. will take D. will be taken5. _ late tomorrow, who would take her place?A. Should Miss Green come B. If Miss Green would comeC. Miss Green should come D. If Miss Green c
6、omes6_ it _, the crops _ be saved.A. Had; rained; could B. Should; rain; would C. If; rains; should D. Would; rain; should7. If we _ yesterday, we _ the work.A. werent interrupted; would finishB. didnt interrupt; would have finishedC. hadnt interrupted; had finishedD. hadnt been interrupted; would h
7、ave finished8. _, he would have succeeded in the examinations.A. If he has worked hard B. If he works hardC. Had he worked hard D. Were he worked hard9. Can I stay at home tomorrow? Yes, you can if it_.A. will snow B. is going to snow C. snows D. snowed10I dont know if he _ this afternoon. But if he
8、 _, I will tell you.A. will come; will do; B. comes; will doC. will come; does D. comes; does11. Ask him to ring me up if you _ him.A. see B. saw C. would see D. will see12. If people _ polluting the air, animals and plants will die soon.A. dont stop B. didnt stopC. shall not stop D. havent stopped1
9、3. Ill go shopping with you if you _ wait.A. will B. would C. should D. are going to答案：（1）含 if 的虚拟条件句从句 主句与现在事实相反 过去式（be 用 were） would/should/could/might+ do与过去事实相反 过去完成式 would/should/could/might + have done与将来事实相反 should (were to) +动词原形 would/should/could/might + doIf I were you, I would tell them
10、the truth. 如果我是你的话，我就会把真相告诉他们。If I got the information, I would let you know first. 如果我知道这个情况的话，我会第一个告诉你。If we had had enough money, we would have bought the house. 如果我们有足够的钱的话，我们就买下那座房子了。If she were to/should come, what should I say to her?万一她来了，我该怎么对她说呢？（2）省略 if 的虚拟条件句在虚拟条件句中，如果有 were，had，或 should，就可以省略 if，把这些助动词放在句首。Were I you, I would tell them the truth. Had we had enough money, we would have bought the house. Should she come, what should I say to her?1-13 BCAAA BDCCC AAA
