有关虚拟语气的疑问（涉及be
虚拟语气是一种特殊的动词形式，一是用来表示说话人所说的话不是一个事实，而是一种假设、猜测、怀疑等(在条件从句中或让步状语从句中)；一是表示说话人的愿望、要求、命令、建议等 (在宾语从句、表语从句、同位语从句)。
虚拟式仅有两个形式：
【一】be-型虚拟式（BE-Subjunctive);
【二】were-型虚拟式（WERE-Subjunctive)。
【一】be-型虚拟式的主要用法
【1】用于表示命令、决定、建议等词语之后的that-分句中。尼尔斯
命令性虚拟语气在美国英语中用得较多。在英国英语中，它用在正式的和相当严格的法律语体中。
The employees have demanded that the manager resign.
尤其是美国英语
The employees have demanded that the manager should resign/resigns.尤其是英国英语
He ordered that all the books be nt at once.
It is esntial that all the facts be examined first.
学生会申请表
The board has given instructions that the agent fly to Boston.
She insists that he is guilty of fraud.
五四时期
We insist that he be admitted to hospital immediately.
insist后面是否用虚拟语气，取决于意义。当这一动词引导的是一个间接陈述句时，就用陈述语气，但当它引导的是一个间接的命令句时，则多半用虚拟语气。suggest也有类似的用法。
I insisted (required) that he (should) change his clothes.
I insisted (asrted) that he changed his clothes.
She suggested (recommended) that I (should) be responsible for the arrangements.
She suggested (said tentatively) that I am responsible for the arrangements.
【2】用于由 if, though, whatever, lest, so long as 等引导的分句中。表示推测让步，防备等含义。
If he be found guilty,John shall have the right of appeal.
上述用法现在只限于正式书面语体，在非正式语体中通常用动词陈述式或者should/may+不定式。
If the rumour is true,everything is possible.
【3】套语式虚拟语气和命令性虚拟语气一样，由动词原形构成。它主要用在独立分句中的某些固定结构中：即用于某些公式化语句中可表示祝愿、诅咒、禁止等意义。
Come what may, we will go ahead with our plan.
God save the Queen! (May God save the Queen)
Suffice it to say that we won. (Let it suffice…)
Heaven forbid that I should let my own parents suffer.
Be it noted that this offer was made in good faith.
Be that as it may, we have nothing to lo.
Long live the People’ s Republic of China!
God bless you!
Heaven damn you!
Devil take him!
So be it!
备注：套语式虚拟语气在语体上往往显得很正式而过分守旧。
【二】were-型虚拟式的主要用法：
【1】常用于由if , if only , as if , as though , though 引导的条件状语和让步状语分句中，表示非真实的条件或让步。
If I were you , I should wait till next week.
If it were to rain , the game would be put off.
if only是if的强化形式，主要用于假设条件分句，表示讲话人所祈愿的事情会发生、正在发生或者早该发生：
If only you would help me next week, I would not be so nervous.
If only they were here now, we would be able to celebrate their wedding anniversary.
If only somebody had told us, we could have warned you.
条件分句有时单独使用，表示一种假设的祈愿：
If only I’d listened to my parents!
I wish I had listened to my parents.
If only he were not so timid!
If only I could make them understand my point of view!
If only I hadn’t lost it!
捏泥人的制作过程only if组合则多用于开放条件句。
条件分句中，有时不用一般现在时态而用现在时虚拟语气来表示开放条件：
If any vehicle be found parked on the premis without written permission, it shall be towed away at the expen of the vehicle’s owner.
If any person be found guilty, he shall have the right of appeal.
这种用法主要限于十分正式的、法律的或准法律的语境中。
我们也可以不用从属连词而用主语-功能词倒装来标明条件关系。在条件分句中，这种倒装形式用得最多的是功能词had：
Had I known, I would have written before.
组合歌手当分句是否定句时，not置于实义动词之前，不可用前接成分：
Had I not en it with my own eyes, I would not have believed it.
在多少带有一点文学色彩的语体中，虚拟语气的were和试探性的should也可用倒装形式：
Were it to reveal its crets, that hou would collap in shame.
Were she in charge, she would do things differently.
Should you change your mind, no one would blame you.
Should she be interested, I’ll phone her.
鼻毛怎么修剪在另外某些含假设意义的结构中，必须用假设过去时或假设过去完成体：
It’s time you were in bed.
I wish this bus went to the university.
If only I had listened to my parents!
在其他一些也有假设意义的结构中，它们则具有随意性：
快乐的春游作文
He acts as if he knew you.
It’s not as though we were poor.
Suppo we told her the truth.
Imagine your child played truant.
I’d rather we had dinner now.
一般来说，我们可以对这些句子作否定的推论，在用假设过去完成体时，否定意义更强。表示探询式的礼貌，而不是假设的意义。
限制性关系分句和其母句，如果是指某种假设情景的话，则采用和假设条件句相同的形式：
Any person who had behaved in that way should have been dismisd.
除would之外，其他情态助动词也可用于假设条件句中，如有could, might和should。
It they would help us, we could finish early.
If we had enough money, we could buy a typewriter.
If you could type, you might save a lot of time.
I might have married her if she would have agreed.
If they had asked me, I would have had to speak.
If he had apologized, you should have done so too.
Were-虚拟语气表示假设或不真实的含义，用在由诸如if, as if, as though, though之类的连
词所引导的状语分句中，也用在像wish和suppo这样的动词后面的名词性分句中。这种虚拟语气只有were这一形式，因此打破了陈述语气动词be过去时第一人称和第三人称单数主谓一致的规则。陈述语气形式was，在不太正式的语体中可用来代替were：
If I were/was rich, I would buy you anything you wanted.
Tim always speaks quietly on the phone, as though he were/was telling a cret.
