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虚拟语气是一种动词形式，表示说话人的一种愿望，假设，怀疑，猜测， 建议等含义，虚拟语气所表示的含义不是客观存在的事实。
If I were you, I’d take them away.
如果我是你的话，我就会带走他们。
If I had met Li Hua, I could had told him.
如果我碰见了李华，我就告诉他了。
If I had time, I could come to help you.
如果我有时间，我会来帮助你的。
He suggested that our class should be divided into five groups.
他建议说我们的班应该分成五个小组。
He speaks to us as if he had been there.
他给我们讲的好象他去过那儿。
一、虚拟语气的用法
1)虚拟语气用在简单句中，表示祝愿，命令。
May you be happy. 祝你幸福。
May you have a good time. 祝愿你玩的愉快。
May the friendship between us last long.
祝愿我们的友情天长地久。
Have a good journey!祝愿你旅途愉快！
You go out！你出去！
2)虚拟语气用在宾语从句中。动词 wish, suggest, order, insist, propose等词后面的宾语从句表示的是一种虚拟语气， 宾语从句中的动词动作表示的只是一种愿望、要求。
I wish she would be on my side. 我希望她能站在我这一边。
I wish I could help him. 我希望我能帮助他。
He insisted that all of us should be there on time by any means.
他坚持要我们大家想尽办法按时去那儿。
动词 demand, suggest, order, insist, propose后面的从句中，“should”可以省略。
The teacher suggested that we(should) clean the blackboard after class.老师建议我们课后把黑板擦了。
He ordered that the students wash the clothes every week by themselves. 他要求学生每周都要自己洗衣服。
3)虚拟语气用在主语从句中
在句型“It is important(necessary, strange, natural) that…”中，that后面的从句中的谓语动词用should+动词原形。
It’s necessary that we should have a walk now.
我们有必要出去散散步。
It’s natural that she should do so. 她这样做是很自然的。
It’s important that we should take good care of the patient.
重要的是我们要照顾好病人。
4)虚拟语气用在状语从句中。
虚拟语气最多地用在表示条件的状语从句和表示结果的主句中。在表示与事实相反的虚拟语气时，动词有三种时态形式，即现在，过去和将来。
与现在事实相反的：
If I (we, you, he, they)+动词过去式。If I (he, she) were…I (we) should+动词原形，He (you, they) would+动词原形。
与过去事实相反的：
If I (we, you, he, they)+had+过去分词 I(we) should+have+过去分词，He (you, they) would+have+过去分词。
If I were you, I should buy it. 如果我是你，我就买了它。
If I had time, I would study French.
如果我有时间，我会学习法语的。
If she knew English, she would not ask me for help.
如果她懂英语的话，她不会找我帮忙的。
If you had got up earlier, you could have caught the train.
如果你早一点起床，就会赶上火车的。
If it were fine tomorrow, I would go shopping.
如果明天天气好，我就去买东西。
二、有关虚拟语气的几个问题：
1)有时if引导的状语从句可以省略if，而把从句中的动词were, had 或should移到主语前面。
Were she younger, she would do it.
如果她年青点， 她就会干的。
Had he known her address, he would had gone to visit her.
如果他知道她的地址，他会去看她的。
2)有时表示虚拟语气的条件从句或者主句都可以省略，而只剩下一个主句或者一个条件从句。
I could help you. 我本来可以帮助你。
If I had time. 我要有时间该多好啊。
She should have come to the party. 她应该来参加聚会。
If he had much more money. 如果他有更多的钱就能……。
3)虚拟语气中，条件从句的动作可以和主句的动作时态不一致。
If they had studied hard, they could do it easily now.
如果他们以前努力学习的话，现在干的就会容易些。
If he had not taken my advice, he wouldn’t do it much better like this. 如果他不听取我的建议，他就不会干得这样好。
三、虚拟语气专项练习
1. The boy acted ____ he had never lived in Canada before.
A. as though B. even if C. as D. since
2. ____ to the doctor right away, he might have been alive.
A. If he went B. Were he gone
C. Should he have gone D. Had he gone
3. If you were older, I ____ you to go there yesterday.
A. will allow B. should allow
C. would have allowed D. had allowed
4. The secretary suggested that they ____ the men in at once.
A. had brought B. should have brought
C. brought D. bring
5. I wish I ____ able to tell him all about it last night.
A. was B. were C. had been D. should be
6. If we ____ here ten minutes earlier, we ____ the bus.
A. arrived; would catch B. arrived; would have caught
C. had arrived; had caught D. had arrived; would have caught
7. If I ____ more time, I would have gone with him.
A. had B. had had C. have had D. would have
8. He was very busy yesterday, otherwise he ____ to the meeting.
A. would come B. came
C. would have come D. had come
9. The Jade Emperor ordered that the Monkey King ____ right away.
A. would be arrested B. must be arrested
C. be arrested D. had to be arrested
10. Jane’s uncle insisted ____ in this hotel any longer.
A. not staying B. not to stay
C. that he not stay D. staying not
11. Don’t touch the sleeping tiger. If he woke up, he ____ you.
A. would come to B. would come at
C. would have come toward D. will come to
12. Without electricity human life ____ quite different today.
A. is B. will be
C. would have been D. would be
13. How I wish I ____ to repair the watch!I only made it worse.
A. had tried B. hadn’t tried C. have tried D. didn’t try
14. He demanded that the laboratory report ____ immediately after the experiment was done.
A. was written B. be written
C. must be written D. would be written
15. The man insisted that he ____ there.
A. should send B. would be sent
C. sent D. be sent
16. If he had not gone out in the storm ____.
A. he will be alive now B. he would be alive now
C. he would have been alive now D. he should have been alive now
17. If it ____ tomorrow, what would we do?
A. rains B. were to rain C. would rain D. rain
18. It is required that you ____ at six.
A. will arrive B. arrive C. arrived D. would arrive
19. If only I ____ how to operate an electronic computer as you do.
A. had known B. would know C. should know D. knew
20. He spoke in a quiet, distinct voice, as though his thought ____.
A. was far away B. had been far away
C. were far away D. went far away
21. If it ____ rain, we ____ get wet.
A. is to, should B. were to, would
C. were going to, would D. was going to, should
22. If he ____ to the teacher attentively, he ____ the answer to the problem now.
A. had listened, would have known B. listened, would know
C. listened, would have known D. had listened, would know
23. But for the party, he ____ of hunger 30 years ago.
A. would have died B. would die
C. must have died D. must die
24. ____ today, he would get there for holiday.
A. Was he leaving B. Were he to leave
C. Would he leave D. If he leaves
25. I would have come earlier, but I ____ that you were waiting for me.
A. didn’t know B. hadn’t know
C. would have known D. haven’t known
26. It’s high time that we ____ to school.
A. would to B. went C. go D. will go
27. It seems as if it ____ rain.
A. will to B. is going to C. is to D. were going to 28. I’d rather you ____ right away.
A. leave B. left C. will leave D. to leave
29. He is working hard for fear that he ____.
A. fails B. failed C. would fail D. fail
30. It is really strange that the girl ____ so early.
A. has been married B. has married
C. be married D. would marry
Key:1.A 2.D 3.C 4.D 5.C 6.D 7.B 8.C 9.C 10.C 11.B 12.D 13.B 14.B 15.D 16.B 17.B 18.B 19.D 20.B 21.B 22.D 23.A 24.B 25.A 26.B 27.B 28.B 29.D 30.C
If I were you, I’d take them away.
如果我是你的话，我就会带走他们。
If I had met Li Hua, I could had told him.
如果我碰见了李华，我就告诉他了。
If I had time, I could come to help you.
如果我有时间，我会来帮助你的。
He suggested that our class should be divided into five groups.
他建议说我们的班应该分成五个小组。
He speaks to us as if he had been there.
他给我们讲的好象他去过那儿。
一、虚拟语气的用法
1)虚拟语气用在简单句中，表示祝愿，命令。
May you be happy. 祝你幸福。
May you have a good time. 祝愿你玩的愉快。
May the friendship between us last long.
祝愿我们的友情天长地久。
Have a good journey!祝愿你旅途愉快！
You go out！你出去！
2)虚拟语气用在宾语从句中。动词 wish, suggest, order, insist, propose等词后面的宾语从句表示的是一种虚拟语气， 宾语从句中的动词动作表示的只是一种愿望、要求。
I wish she would be on my side. 我希望她能站在我这一边。
I wish I could help him. 我希望我能帮助他。
He insisted that all of us should be there on time by any means.
他坚持要我们大家想尽办法按时去那儿。
动词 demand, suggest, order, insist, propose后面的从句中，“should”可以省略。
The teacher suggested that we(should) clean the blackboard after class.老师建议我们课后把黑板擦了。
He ordered that the students wash the clothes every week by themselves. 他要求学生每周都要自己洗衣服。
3)虚拟语气用在主语从句中
在句型“It is important(necessary, strange, natural) that…”中，that后面的从句中的谓语动词用should+动词原形。
It’s necessary that we should have a walk now.
我们有必要出去散散步。
It’s natural that she should do so. 她这样做是很自然的。
It’s important that we should take good care of the patient.
重要的是我们要照顾好病人。
4)虚拟语气用在状语从句中。
虚拟语气最多地用在表示条件的状语从句和表示结果的主句中。在表示与事实相反的虚拟语气时，动词有三种时态形式，即现在，过去和将来。
与现在事实相反的：
If I (we, you, he, they)+动词过去式。If I (he, she) were…I (we) should+动词原形，He (you, they) would+动词原形。
与过去事实相反的：
If I (we, you, he, they)+had+过去分词 I(we) should+have+过去分词，He (you, they) would+have+过去分词。
If I were you, I should buy it. 如果我是你，我就买了它。
If I had time, I would study French.
如果我有时间，我会学习法语的。
If she knew English, she would not ask me for help.
如果她懂英语的话，她不会找我帮忙的。
If you had got up earlier, you could have caught the train.
如果你早一点起床，就会赶上火车的。
If it were fine tomorrow, I would go shopping.
如果明天天气好，我就去买东西。
二、有关虚拟语气的几个问题：
1)有时if引导的状语从句可以省略if，而把从句中的动词were, had 或should移到主语前面。
Were she younger, she would do it.
如果她年青点， 她就会干的。
Had he known her address, he would had gone to visit her.
如果他知道她的地址，他会去看她的。
2)有时表示虚拟语气的条件从句或者主句都可以省略，而只剩下一个主句或者一个条件从句。
I could help you. 我本来可以帮助你。
If I had time. 我要有时间该多好啊。
She should have come to the party. 她应该来参加聚会。
If he had much more money. 如果他有更多的钱就能……。
3)虚拟语气中，条件从句的动作可以和主句的动作时态不一致。
If they had studied hard, they could do it easily now.
如果他们以前努力学习的话，现在干的就会容易些。
If he had not taken my advice, he wouldn’t do it much better like this. 如果他不听取我的建议，他就不会干得这样好。
三、虚拟语气专项练习
1. The boy acted ____ he had never lived in Canada before.
A. as though B. even if C. as D. since
2. ____ to the doctor right away, he might have been alive.
A. If he went B. Were he gone
C. Should he have gone D. Had he gone
3. If you were older, I ____ you to go there yesterday.
A. will allow B. should allow
C. would have allowed D. had allowed
4. The secretary suggested that they ____ the men in at once.
A. had brought B. should have brought
C. brought D. bring
5. I wish I ____ able to tell him all about it last night.
A. was B. were C. had been D. should be
6. If we ____ here ten minutes earlier, we ____ the bus.
A. arrived; would catch B. arrived; would have caught
C. had arrived; had caught D. had arrived; would have caught
7. If I ____ more time, I would have gone with him.
A. had B. had had C. have had D. would have
8. He was very busy yesterday, otherwise he ____ to the meeting.
A. would come B. came
C. would have come D. had come
9. The Jade Emperor ordered that the Monkey King ____ right away.
A. would be arrested B. must be arrested
C. be arrested D. had to be arrested
10. Jane’s uncle insisted ____ in this hotel any longer.
A. not staying B. not to stay
C. that he not stay D. staying not
11. Don’t touch the sleeping tiger. If he woke up, he ____ you.
A. would come to B. would come at
C. would have come toward D. will come to
12. Without electricity human life ____ quite different today.
A. is B. will be
C. would have been D. would be
13. How I wish I ____ to repair the watch!I only made it worse.
A. had tried B. hadn’t tried C. have tried D. didn’t try
14. He demanded that the laboratory report ____ immediately after the experiment was done.
A. was written B. be written
C. must be written D. would be written
15. The man insisted that he ____ there.
A. should send B. would be sent
C. sent D. be sent
16. If he had not gone out in the storm ____.
A. he will be alive now B. he would be alive now
C. he would have been alive now D. he should have been alive now
17. If it ____ tomorrow, what would we do?
A. rains B. were to rain C. would rain D. rain
18. It is required that you ____ at six.
A. will arrive B. arrive C. arrived D. would arrive
19. If only I ____ how to operate an electronic computer as you do.
A. had known B. would know C. should know D. knew
20. He spoke in a quiet, distinct voice, as though his thought ____.
A. was far away B. had been far away
C. were far away D. went far away
21. If it ____ rain, we ____ get wet.
A. is to, should B. were to, would
C. were going to, would D. was going to, should
22. If he ____ to the teacher attentively, he ____ the answer to the problem now.
A. had listened, would have known B. listened, would know
C. listened, would have known D. had listened, would know
23. But for the party, he ____ of hunger 30 years ago.
A. would have died B. would die
C. must have died D. must die
24. ____ today, he would get there for holiday.
A. Was he leaving B. Were he to leave
C. Would he leave D. If he leaves
25. I would have come earlier, but I ____ that you were waiting for me.
A. didn’t know B. hadn’t know
C. would have known D. haven’t known
26. It’s high time that we ____ to school.
A. would to B. went C. go D. will go
27. It seems as if it ____ rain.
A. will to B. is going to C. is to D. were going to 28. I’d rather you ____ right away.
A. leave B. left C. will leave D. to leave
29. He is working hard for fear that he ____.
A. fails B. failed C. would fail D. fail
30. It is really strange that the girl ____ so early.
A. has been married B. has married
C. be married D. would marry
Key:1.A 2.D 3.C 4.D 5.C 6.D 7.B 8.C 9.C 10.C 11.B 12.D 13.B 14.B 15.D 16.B 17.B 18.B 19.D 20.B 21.B 22.D 23.A 24.B 25.A 26.B 27.B 28.B 29.D 30.C