虚拟语气：
I.和时态有关，一般由if, if only, I wish引导，表示和事实相反
事实：I am a boy.
If I were a girl, I would marry an old but rich man.
事实：You didn't help me in the exam yesterday.
If you had helped me in the exam yesterday, I would have passed the exam. 事实：He is to leave tonight. He will arrive in Beijing tomorrow.
If he were to leave (should leave) tonight, he would arrive in Beijing tomorrow. 错综条件句：
If you had helped me in the exam yesterday, (I would have passed the exam. You are happy because you passed the exam.
If I were you,) I would be happy now.
If you had helped me in the exam yesterday, I would be happy now. 虚拟语气中省略if，助动词位于主语之前。
If I were a girl, I would marry an old but rich man.
Were I a girl, I would marry an old but rich man.
But for, without用来表示对过去的虚拟
But for your help, I would have failed the exam.
II. 在表示命令、建议、要求的动词引导的从句中，用(should +) do
Suggest, insist, advise, demand, require, ask, propose
I suggested that he go there immediately.
此类动词相应的名词形式
His advice was that Mary be sent to hospital at once.=He advised that 此类动词相应的形容词形式
Suggestive, advisable, necessary, important, crucial, vital, strange It is strange that such an accident should happen to your factory. *lest (that), in case (that)以防
Take your umbrella with you in case it (should) rain.
特例：
suggest建议；表明，暗示
All these evidences suggested that he _was_ a thief. be
insist坚持要求；坚持说
She insisted that he _go_ to Beijing immediately. go
She insisted that he _was_ a liar. be
III. 杂项
It is (about/high/over) time that +过去时
It is time that we had a rest.
It is time that effective measures were taken before things go worse.
Would rather +sb +过去时
-Can I have a smoke here?
-I would rather you didn't.
第二篇：虚拟语气总结
虚拟语气总结
1. 条件句中的虚拟语气
（1）对现在的虚拟
If I________（有空）now, I would go with you to the party.
（2）对过去的虚拟
If you______（参加）the party last night, you would have met me.
（3）对将来的虚拟
If it tomorrow, we would postpone the sports meet. 特别注意：虚拟语气中的倒装
条件句中有should, were to do, had done, 把if省掉，然后将
2. 宾语从句中的虚拟
(1)
坚持、建议： 决定：decide
命令：order, command
要求：demand, require, request
We all suggest that John _____________.
.
特别提示：
I wish I were 10 years younger.
I wish I could fly.
I would rather have gone to the party yesterday.
I would rather you had gone to the party yesterday.
3. 主语从句中的虚拟
(1) It’s suggested/insisted/proposed/ordered/
recommended/ that we (should) take immediate action.
(2) It’s important/vital/necessary/essential that we (should) cheer up.
(3) It’s strange, surprising, astonishing, incredible, shocking that you should have trusted such a big liar.
(4) It’s (high/about) time that we had a rest/should have a rest.
4. 表语从句中的虚拟
It seemed as if the day would never end.
My suggestion/advice/recommendation/proposal is that we (should) start off early tomorrow.
5. 同位语从句中的虚拟
The order worried all of us.
His request
6. as if/as though状语从句中的虚拟
He treated me as if I were his own brother.
He talked as if he had been there before.
7. 混杂虚拟语气
If I had listened to your advice yesterday, I wouldn’t be in troI would have attended the meeting, but I was too busy.
8. 含蓄虚拟语气
Without music, the world would be very dull.
But for your help（如果要不是你的帮助）, =If it had not been for your help, I wouldn’t have succeeded.
9. 其他形式的虚拟语气
May you succeed!
May you have good luck.
Long live China.
Long live our friendship.
God bless you!