主从句的谓语形式
时间 If 从句的谓语形式 主句的谓语形式
现在 过去
did / were had done 1. did / were 2. should do 3. were to do
would/could/should /might +V.(原) would/could/should/ might+have+p.p.
Leaning aims 教学目标
• 一、深入了解，掌握虚拟语气 • 二、团结互助，积极主动，勇于展现自 我
英语动词有 三 种语气 陈述语气 祈使语气 虚拟语气
用来表示说的话不是事实，或者是 不太可能发生的情况，而是一种愿 望，建议，假设的语气叫虚拟语气。
虚拟语气的考点
1、条件句中的虚拟语气的用法；
将来
would/could/should /might + V.(原)
与现在事实相反的虚拟条件句
If + 主 + did(were), 主+would/should/could/might +动词原形
1. 如果我是你，我会再试一次。
If I were you, I would try it again.
This same thing, happening in wartime, would lead to a disaster. (条件暗含在分词短语happening in wartime中) He must have the strength of a hippopotamus, or he never could have vanquished that great beast. (暗含条件是连词or) Alone, he would have been terrified. (暗含条件是alone)
I wish (that) I had seen the film last night. I wish (that) I would\could go.
2.表示要求,命令,建议的虚拟语气
一个坚持，两个命令， 三个建议，四个要求 1.insist 2. order, command 3. advise, suggest, propose (advice, suggestion, proposal ) 4. demand , require, request, desire 这些词引导的名词性从句要使用虚拟语气。 即从句中的动词使用should + 动词原形， 或者将should省略。
Homework
1.Finish the Exercise 1 and 2 after class 2.Preview Period 4
非真实条件句中的条件从 句有时不表出来，只暗含 在上下文中，这种句子叫 做含蓄条件句。含蓄条件 句大体有 hat would I have done without you? (条件暗含在分词短语without you中)
1.如果他努力学的话，他就通过这次考试。
If he had worked hard, he would have passed the examination.
2.要是当时我和她结了婚的话，那我是很不幸的。
If I had married her, I would have been unhappy.
3. 在不少情况下，虚拟式已变成习惯说 法，很难找出其暗含的条件。如：
You wouldn’t know. 你不会知道。
I would like to come. 我愿意来。
I wouldn’t have dreamed of it. 这是我做梦也不会想到的。 He told the story in such minute detail that he might himself have been an eye-witness. 他将那事讲的非常仔细，简直就象他亲眼看 见一样
2、条件句中虚拟语气的倒装； 3、名词性从句中虚拟语气的用法；
4、几种特殊结构中虚拟语气的用法;
5、虚拟语气时态的判定。
if引导的虚拟条件句
虚拟语气
虚拟语气在 在条件从句中
[例句] 1. If you had come a few minutes earlier, you would have met him. 要是你早来几分钟的话，你就能见到他了。 (与过去事实相反) 2. If it were sunny tomorrow, I would come to see you. 明天要是天气好的话，我来看你。(与将来 事实可能相反) 3. If I were you, I would go at once. 假如我是你的话，我会马上走。(与现在事 实相反，事实上我不可能是你)
名词性从句中的虚拟 语气及几种虚拟语气 特殊句型
二、虚拟语气在名词从句中的运用 （1）用于宾语从句 １、wish 后面的宾语从句中。 一般用虚拟语气，表示一种不可能实现的愿望。其谓 语动词形式为：
表现在
表过去
过去时
过去完成时
表将来 would, might, could＋动词原形 I wish (that) I were a bird.
It would be easier to do it this way. (条件暗含在不定式短语to do it this way 中)
But for your help we couldn’t have succeeded in the experiment. (暗含条件是but for your help)
3. would rather + 从句
动词用过去式或过去完成时
I would rather you told me the truth.
I would rather you had gone there last Sunday.
4. as if ( as though) 看起来 常用虚拟形式，即 表示与现在事实相反，用过去式；与过去事实相反 用过去完成式 (had done). He treats /treated the boy as if he were his own son. He speaks/ spoke as if he had known about it
2.如果我有一百万美元，我会买下这架飞机。
If I had one million dollars, I would buy the plane.
与过去事实相反的虚拟条件句
If +主 +had done sth, 主+would/should/could/might +动词完成式（have done）
2. 条件暗含在上下文中。如：
You might stay here forever. (可能暗含if you wanted to)
We would have succeeded. (可能暗含if we had kept trying)
Your reputation would be ruined. (可能暗含if you should accept it) I would appreciate a little of your time. (可能暗含if you were so kind as to give me a little of your time)