专题十八虚拟语气
重难点分析
虚拟语气是英语中一个较大的语法项目，高考语法填空和短文改错都曾经设过考点，考生应予以重视。英语中的语气分为陈述语气、祈使语气、虚拟语气、疑问语气和感叹语气五类。虚拟语气表示说话人的愿望、假设、猜测或建议，而不是表示客观存在的事实。此外如需表达主观愿望或某种强烈的感情时，也可用虚拟语气。虚拟语气通过谓语动词的特殊形式来表示。
一、虚拟语气在从句中的用法和构成一览表
二、其他要注意的事项
1. 虚拟语气中出现be的过去式，在口语中，当主语是第一、三人称单数时，可用was，但在if的倒装句中只能用were。如：Were I you, I would apologize to her. 如果我是你的话，我就会去向她道歉。
2. suggest表“暗示、表明”和insist表“坚持认为”时，其后的宾语从句用陈述语气。如：
Your pale face suggests that you are ill. 你苍白的脸色表明你生病了。
He insisted that he was right. 他坚持认为他是对的。(如insist表“坚持要求”时，其后的宾语从句则要用虚拟语气)
3. if虚拟语气条件句中如有had, should, were，可省略if，并将这些词提前引起倒装。如：
Were I you, I would remain. 如果我是你，我会留下来。
Had you told me earlier, I wouldn’t have missed it. 如果你早点告诉我，我就不会错过它了。
4. 可用without, but for构成的介词短语代替虚拟语气条件句。如：
But for your help, I would have failed the exam. 如果没有你的帮助，我不会通过考试的。
Without water, there would be no life. 没有水，就没有生命。
5. as if/though, even if/though引导的从句也可以不用虚拟语气，表示真实的情况。如：
It looks as if it is going to rain. 看起来似乎要下雨了。
考点练透
一、单句填空用括号中所给动词的适当形式填空。
1. — If he ___________ (warn), he ___________ (not take) that food.
— Luckily he was sent to the hospital immediately.
2. When a pencil is partly in a glass of water, it looks as if it ___________ (break).
3. I would rather they ___________ (not hear) of the news.
4. I wish ___________ (have) a room of my won when I was a child.
5. But for the teacher, I ___________ (not change) my attitude to study yet.
6. Without air to hold some of the sun’s heat, the earth at night ___________ (be) freezing cold, too cold for us to stay.
7. If I had worked harder at school, I ___________ (sit) in a comfortable office now.
8. Her pale face suggested that she ___________ (be) ill, and her colleagues suggested that she ___________ (have) a medical examination.
9. I insisted he ___________ (go) to see a doctor, but he insisted nothing ___________ (be) wrong with him.
10. He asks that he ___________ (give) an opportunity to explain why he has refused to go there.
11. It is high time we ___________ (get) down to discuss this plan.
12. If it were not for the fact that you ___________ (be) too busy, I would ask you to help me do this right now.
13. Who do you suggest ___________ (send) to work there?
14. I would have come earlier, but I ___________ (not know) that you were waiting for me.
15. If it ___________ (rain) tomorrow, the outing would be cancelled.
16. If there were no air, people ___________ (die).
17. If he ___________ (study) harder, he might pass the exam.
18. If he ___________ (take) my advice, he would not have made such a mistake.
19. We would rather you ___________ (go) here tomorrow.
