文档介绍：虚拟语气 教学设计及反思
教材分析：
虚拟语气是英语学****的重点和难点内容，掌握虚拟语气和客观事实相反的三种情况，即和过去，如今和将来相反的三种情况下，从句和主句动词的适宜使用。虚拟语气的内容多，学生容易混淆，处理难度大。因此课本也用了较/would/
could/might+do
例：1．If I were you, I would take an umbrella.
2．If I knew his telephone number, I would tell you.（精品文档请下载）
3．If there were no air or water, there would be no living things on the earth.（精品文档请下载）
3. 虚拟条件句的特殊情况
(1). 混合/错综型虚拟语气
当条件状语从句表示的行为和主句表示的行为所发生的时间不一致时，称为‘错综条件句’，动词的形式要根据它所表示的时间作出相应的调整。（精品文档请下载）
If you had followed my advice, you would be better now.(从句说的是过去，主句是如今)（精品文档请下载）
If I were you, I would have taken his advice.(从句是如今，主句是过去)（精品文档请下载）
（2）省略if的虚拟语气
假设从句中含有were/ should/ had时，那么可以把这三个词置于句首，。（精品文档请下载）
If it should happen, what would you do? →Should it happen, what would you do?（精品文档请下载）
If he had recognized me, he would have come over. →Had he recognized me, he would have come over.（精品文档请下载）
(3) 含蓄虚拟条件句
有时候假设的情况不以if引导的条件从句形式表现出来，而是通过一个介词短语，连词或其他形式表示。常用的词或短语有：without, with, but for(要是没有), otherwise, or, but等。（精品文档请下载）
Without your help(=If we had not had your help), we could not have succeeded.（精品文档请下载）
But for electricity(=If there were no electricity, there would be no modern industry.（精品文档请下载）
He felt very tired yesterday, or/ otherwise he would have attended the party.（精品文档请下载）
(4) 在if it were( had been )not for ….句型中的虚拟语气
虚拟语气也常用于‘if it were/(had been) not for ….’句型中，意为‘要不是由于…’。（精品文档请