subjunctive mood can be divided into two forms:be-subjunctive and were-subjunctive.

be-subjunctive is realized by the base form of the verb.Whatever the person of the subject, the verb takes the base form. be-subjunctive is mainly used in 3 cases

1.remember four Chinese words

2.adverbial clauses introduced by"if, though, whatever, so long as, whether,lest,etc.

3.in certain formulaic expression_r

were-subjunctive has only one form were.And it is used in certain adverbial clauses and certain nominal clauses. 

 

 

课后习题

_____(be) that as it may,our expenditure is bound to increase.

答案：Be

解析：前半句可还原为as it may be that,

 

He is my best friend,my second self,as it____(be).

答案：were

解析：as it were结构中做so to speak解，即“宛如，好比”只能用were不用was.

 

It's essential that he____(be) here by tomorrow.

答案：be

It's necessary that every member____ (inform)himself of these rules.

答案：inform

解析：be-型虚拟用在essential,necessary等形容词之后的that-分句中，即不管主语是什么人称动词一律用原形。

 

I propose he_____(excuse).

答案：be excused

解析：propose表建议后跟be-型虚拟，而根据句意他被原谅应使用被动语态，所以是be excused.

 

If it_____(rain)tomorrow,the match would be postponed.

答案：were to rain

解析：看题可知这是were-型虚拟式用于由if引导的条件状语分句中，根据主句中would be可知从句中应使用were to do.其中were可用was代替。

 

It's just struck midnight.It's high time we____(go)to bed.

答案：went

解析：用动词的过去时形式表示假设意义it is time(that)…为其中一例典型，表示是该什么什么了。

 

If only I____(keep)my mouth shut!

答案：kept

解析：if only结构用动词过去时形式表示假设意义

 

She insists on his taking his vacation now.

答案：She insists that he take his vacation now.

解析：insist做坚决要求讲，转换为be-型虚拟.

 

如果你不听我的忠告，那就算了。

答案：If you do not listen to my advice,so be it.

解析：be-型虚拟用于某些公式化语句中表示祝愿、诅咒、禁止等意义，so be it表示但愿如此/那就这样吧。

 

四级真题

I'd rather we____our lesson now.

A)have   B)had    C)should have    D)shall have

答案：B

分析：句意为 我宁愿我们现在就上课 用过去时表示对不可能发生的事情的希望。

 

_____their help,we wouldn't have succeeded.

A)Hadn't been for    B)Had it not been for   C)It hadn't been for   D)Hadn't it been for

答案：B

分析:主句用would have done对应从句应是had done,此题为省略了if得到装，故紧接主语的动词提前，其他成分不变，选B

 

The board deemed it's urgent that these files___right away.

A)had to be printed   B)should have been printed   C)must be printed   D)should be printed

答案：D

分析：urgent表示急需的后的宾语从句应使用虚拟式，即should+动词原形。

 

She always put her medivation on the top of the shelf lest the children____it by mistake.

A)took  B)should take  C)had taken   D)would take

答案：B

分析：lest以免的意思  后跟be-型虚拟式，加（should）动词原形

 

It is generally thought to be of necessity to a college student that he ____at least one foreign language.

A)know   B)knows   C)would know   D)should have known

答案：A

分析：根据句型可知为be-型虚拟，后接动词原形。

 

Had the weather been good, the children _____ out for a walk.
A. had gone        B. could have gone    C. would go      D. went
答案：B

分析：表示与过去的事实相反，前半句倒装，还原为if the weather had been……所以主句应用have done.

 

Peter wishes that he _____ law instead of literature when he was in college。
A. could study   B. studied   C. had studied   D. would study
答案：C

分析：表示过去没有实现的愿望用过去完成。

 

He talks as if he _____ everything in the world.
A. knows        B. knew     C. had known  D.would have known

答案：B

分析：as if后的从句中，表示与现在事实相反或对现在的情况有所怀疑动词用一般过去式。

 

_____for a long time, the fields are all dried up.

A)There has been no rain      B)Having no rain  

C)There having been no rain   D)There being no rain

答案：C

分析：for a long time可知应用完成时，前半部分应该是一个独立结构，所以A不能选，应为C

 

If you have never planted anything, you won't be able to know the pleasure of watching the thing you have planted_____.

A.grow   B.to grow   C.growing    D.to be growing

答案：A

分析：watch后跟不带to的不定式，作宾语补足语。C选项有疑问。

 

经过这几周的语法学习，让我对被动语态和虚拟语气有了更深的了解，也对于曾经做错的题目有了更明晰的理解，语法学习因为是比较客观的教义，所以难免会有些枯燥，但是在攻克哪怕一个小小的疑问后，也会让人感觉清爽很多，就是这样一个一个小的难题攻克后，才能让我们今后可以更加流利准确的说出英文，写出精彩的英语文章，更加现实的是在专业考试中取得好的成绩，所以我们应该更加认真的学习语法。