重点中学英语语法讲义-虚拟语气

7. 某些用虚拟语气的主语从句

形容词important, impossible, necessary等后的主语从句通常用虚拟语气：

It is impossible that he should go home. 他不可能会回家去。

It is necessary that I should return it right now. 我有必要马上还回去。

注：(1) 在现代英语中，有时也可不用虚拟虚拟语气而用陈述语气，但初学者宜慎用。

(2) 在It is amazing (strange, surprising, astonishing, a pity, a shame)以及 I am surprised (sorry) 和I regret等结构后的that 从句中有时也用should，表示说话人的惊异、懊悔、失望等情感，常含有“竟然”之意。如：

It’s strange that he should be so rude. 他竟如此无礼，真是奇怪。

I’m surprised that he should have failed. 他竟然失败了，这使我很吃惊。

若不用虚拟语气也可以，则不带感色彩，比较：

It’s a pity that he failed the exam. 他考试没及格，真是遗憾。

It’s a pity that he should have failed the exam. 他考试竟没及格，真是遗憾。

四、重点考点原创精练

1. If he was here, he _______ us how to do it.

A. told                      B. would tell             C. had told                D. had told

2. If we _____ 200 years old, we _____ everything.

A. were to be, could change                       B. had been, changed

C. were, would have changed                     D. should be, changed

3. If your father ______this, he would be angry.

A. knows                  B. knew                    C. had known            D. would know

4._______ your address, I would have written to you. 

A. Did I know           B. Were I to know C. Had I known             D. If I should know

5.______ he fail, he would kill himself.

A. Should                 B. Would                  C. Had                      D. If 

6. The doctor insisted that I ______ the medicine, but I insisted that I ______ ill.

A. take, wasn’t          B. should take, be      C. take, should be      D. took, should be

7.I wish you _______ him my telephone number, but you did.

A. didn’t give            B. hadn’t given          C. wouldn’t give        D. shouldn’t give

8. “Shall I open the window?” “I’d rather you ______.”

A. can’t                    B. won’t                   C. didn’t                   D. hadn’t

9. It’s already 12 o’clock. It’s high time you ____to bed.

A. went                    B. had gone               C. would go              D. go

10. I’m really busy, or I ____ with you.

A. will go                 B. went                     C. would go              D. have gone

11. It was lucky. Meeting anywhere else, we ____ each other.

A. couldn’t have recognized                       B. hadn’t recognize

C. couldn’t recognized                               D. didn’t recognize

12. It’s possible that he _____ us some money, but it’s impossible that he _____ us so much.

A. will lend, will lend                                B. will lend, should lend

C. should lend, will lend                            D. should lend, should lend 

13. Thank you very much indeed. If it had not been for your advice I really _____ what I should have done.

A. don’t know           B. didn’t know          C. hadn’t known        D. wouldn’t have known 

14. “It looks as if he were drunk.” “So it does. _____.”(www.hxen.net)

A. He’d better give up drinking                  B. He shouldn’t have drunk so much

C. Health is more important than drink        D. I wonder why he is always doing so 

15. “Mary looks hot and dry” “So _____ you if you had a high fever.”

A. do                        B. are                       C. will                      D. would          

参考答案：1—5 BABCA  6—10 BBCAC  11—15 ABADD