虚拟语气用法归纳
英语的动词一般可带有三种不同的语气：陈述语气，祈使语气和虚拟语气。不同的语 气用动词的不同形式（有的还借助句法形式）来表示。
一、虚拟条件句
条件句有两类：一类是真实条件句，一类是虚拟条件句
如果假设的情况是有可能发生的，就是真实条件句，谓语用陈述语气。
If you don 'work hard, you will fail.
If it is fine tomorrow, we will go for a picnic.
如果假设的情况过去、现在、将来都不存在，则为虚拟语气
虚拟条件句和对应主句的动词形式列表：
条件从句的谓语动词形式
主句谓语动词形式
与过去事实相反的假设
had done
would/could/might/should have done
与现在事实相反的假设
过去时（was f were）
would/could/might/should do
与将来事实相反的假设
过去时 （wasf were ）; should do;
were to do
would/could/might/should do
1•与现在事实相反的虚拟
What would you do if you won the lottery?
If I were you, I would seize the cha nee to go abroad.
If I had a lot of money no w, I would travel around the world.
2.与过去事实相反的虚拟
If you had bee n here yesterday, you would have see n her.
If he had driven more carefully, he would not have had the car accident yesterday.
3.与将来事实相反的虚拟
If it were to rain/should rai n/rai ned tomorrow, our pla n would be put off.
If we were to pic nic, we would not be able to help.
二、错综、混合虚拟语气
通常，在上面表格里反映的是非真实条件句的虚拟语气模式，从句和主句的谓语动词 时间是一致的，如果两者时间不一致，此时就是混合型虚拟语气。混合型虚拟语气的使用 要求“各自为政”，即从句和主句根据各自假设的时间不同，采用上面表格中对应的的谓语 动词形式。
1.If I had see n you, I would not be so worried now.（    从句是对过去的假设，主句是对现在的
假设）
2.If you had not watched televisi on so late last ni ght, you would not be so sleepy no w.（    从句
是对过去的假设，主句是对现在的假设    ）
3.Had you followed the doctor ' suggesti on, you would be fine no w.（    从句是对过去的假设，
主句是对现在的假设）
4.If I had made some money last summer, I would go on holiday next mon th.（    从句是对过
去的假设，主句是对将来的假设 ）
5.You did n 'let me drive. If we had drive n in turns, you would n    'be so tired now.（ 从句是
对过去的假设，主句是对现在的假设    ）
6.If I were your mother, I would let you go out this weekend. ( 从句是对现在的假设，主句是 对将来的假设 )
三、含蓄虚拟语气
虚拟语气中的“含蓄之美”指的是含蓄虚拟语气。因为有时假设的情况并不是以 if 引 导的条件从句形式出现， 而是通过一些短语等形式暗示虚拟语气的存在， 常用的词语有 with, without, but for, otherwise, or , even, in case of, what if(如果 …将如何)等等，这种句子往往 有主句而无从句    (考试时多数情况是对过去的假设    )。
But for your encouragement, I would not have been admitted to this university.    (过去)
Without water, all lives would die. (现在)
He felt too tired yesterday, or he would have attended my party. (过去)
Iwas having a meeting, otherwise I would have come to see you off. (过去)
四、    虚名词性从句的虚拟语气
含有 should +V 的用法， 这一部分主要是有关建议和命令的相关从句， 包括主语从句， 宾语 从句，表语从句，同位语从句以及以之相关的形式主语宾语之类的从句。记忆口诀：一个 坚持 (insist) ，两个命令 (order, command) ，三个建议 (suggest, advise, recommend) ，四个要 求 (ask, require, demand, request) 。
1.宾语从句的虚拟语气
He insisted that the meeting be put off.
The general ordered (that) all the soldiers (should ) leave.
He gives orders that the soldiers (should) leave.
2.表语从句的虚拟语气
My suggestion is that we (should) stay here for a rest.
3.同位语从句的虚拟语气
There is no suggestion that she (should) resign.
4.主语从句的虚拟语气主要体现在 It fine是什么意思做形式主语的三种情况：    It's +p.p +that ； It's
+ adj. +that ； It ' s + n. +that
常用的动词 recommand, demand, desire, order, request, require, suggest,command 常 用 的 形 容 词 important, necessary, right, advisable, natural, strange, surprising, regretful,urgent, vital, insistent, essential 常用的名词 duty, pity, no surpise, no wonder, shame, regret 其实这些词在句子中其实也有建议命令类似的的意思
It ' s important that you should take the medicine.
It ' s a pity that you should refuse the invitation.
It ' s essential that we should learn some knowledge about fist aid.
It ' s demanded that all the students should go to the playground.
It was suggested that he should join the club activities.
5.It 为形式宾语的情况实际上是上面形式主语的一种变形，是以    it 为形式宾语的复合
宾语从句， it 后面的宾语补足语多为形容词或名词， 常见词就是上面形式主语后面的那些词。
I consider it vital that he (should) think deeply before acting.
We think it necessary that the meeting (should) be put off.
6.某些词语如 suggest, insist 等有双重含义， 所以在使用的时候要注意什么时候用虚拟 语气，什么时候不用虚拟语气。
Her smile suggested that she was in favor of the plan.
We insisted that what the boy did was wrong.
五．虚拟语气在特殊句式中的运用，主要有两种情况：
I.would rather, It ' s time …,for fear that …
would rather 在使用时要注意它的不同用法。 因为本身 would rather 可以直接接动词原
形，构成 would rather do sth. （than do sth.else）; 或者 would do sth. rather than do sth.else. 而虚拟语气的 would rather 是这样使用的 would rather sb. did（ 对现在或将来的假设 ）/ had done（ 对过去的假设 ）
I would rather he didn ' t go now.
They would rather they hadn ' t attended the party.
It' s （about） （high） time （that） …从句中常用过去式 （有时也用 should do）, 含建议的意 思。汉语的意思为 “是该做 … 的时候了 ”，也等于 It ' s time for sb. to do sth.
It' s high time （that） we went home.
It' s high time that we （should） go home.
It' s high time for us to go home.
for fear that 后面可以接虚拟语气 should d o ，也可以接其他语气，但依然会有一个情 态动词。

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