虚拟语气的构成及其用法. 1 -1．虚拟语气用于非真实条件句时的构成 (P210). 1 ） If a better material _____, the strength of the part would have been increased. A. had been used B. had been using C. being used D. using. 答案为 A. 2 ） Had the weather been good, the children _____ out for a walk.
1）If a better material _____, the strength of the part would have been increased.
A. had been used B. had been using
C. being used D. using
2）Had the weather been good, the children _____ out for a walk.
A. had gone B. could have gone
C. would go D. went
（当if从句中含有were, had, should这三个词时，if可以省略，主谓倒装。）
If it were to rain tomorrow, the game would be put off.
通常出现以下词或词组*without (如果没有)，otherwise （否则）， but for （要不是,+n），but that(若不，后从句)
1) But for your help, they couldn't have succeeded.
2) She wasn't feeling well. Otherwise, she
wouldn't have left the meeting so early.
3) Without computer,we ___the tremendous medical advancement in the last few decades.
A.would not make B. will not have made
C.could not make D.shouldn't have made
4） I 'd have come with you____I am so busy.
A. except for B.provided that
C.but that D.so long as
2-1．这些表示建议、命令或要求的动词或名词：suggest(suggestion), propose(proposal), advise (advice), demand, insist, order, request, require, command, desire, ask, decide等，在从句中，谓语形式为（should）+V （should可以省略）
例：The general’s command was that the soldiers _____ their fort and carry out more important task.
A. would leave B. leave C. left D. have left
2-2在It is desired(或desirable), It is important， It is suggested, It is requested, It was ordered,
It is necessary, It is essential. It is vital,
It is urgent, It is impossible, It is preferable,
It is advisable, It was proposed等结构后面的主语从句中，谓语形式为（should）+V（should可以省略）
例1：It’s desired that she _____ to teach us at least twice a week。
A. comes B. will come C. come D. may come
例2：It is advisable that the message___sent at once. A)be B) is C) will be D) is to be
3-1．在wish以及would （had）rather, as if/though后边that从句中的虚拟语气，一般是将谓语动词提前一个时态。
1）I wish I knew his address.
2）I am too busy these days. I would rather all of you _____ next month for a dinner.
A. come B. would come C. came D. have come
3）He talks as if he _____ everything in the world.
A. knows B. knew C. had known D. would have know
Peter wishes that he _____ law instead of literature when he was in college.
A．could study B. studied
C. had studied D. would study
4．在It is (high) time后边的that从句中，动词用过去式，表
例：Don’t you think it is time you _____ smoking?
A. give up B. gave up C. would give up D. should give up
例：I’m sorry I couldn’t get in touch with him before he left, I _____ him earlier.
A. had a telephone B. have phoned
C. should have phoned D. should be phoned
II. Exercises on(1)
1.B 2. B 3.C
4.B 5.D 6.B
7.C 8.C 9.B
10.B 11.A 12.D
13.D 14.D 15.C
16.B 17.D 18.C