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译林版模块六 Module VI Making a better world英语《Unit 4 Helping people around the world Grammar and usage(1)_ Unreal conditions and things hoped for or desire》优秀教学ppt课件
1. 虚拟语气在if条件句中的运用
类别
从句谓语动词
主句谓语动词
与现在事实相反
过去式(be用were)
should/would/could/might+动词原形
与过去事实相反
had+过去分词
should/would/could/might+have+过去分词
与将来事实相反
过去式(be用were)
should/would/could/might+动词原形
should+动词原形
were to+动词原形
“一表（格）”
*If my brother were here, everything would be all right.
*If it should rain this afternoon, the basketball match would be put off.
*If you had taken my advice, you would not have failed in the exam.
特殊1. 虚拟条件句中的省略与倒装
如果虚拟条件句中含有were/had/should, 可把if省略, 把were/had/should提到主语之前形成倒装; 若为否定形式, not不可提前。
*Had he caught the morning train, he would not have been late for the meeting.
“三特殊”
特殊2. 错综时间条件句
有时条件句的动作与主句动作发生的时间不一致, 这时动词的形式应根据它们各自表示的时间加以调整。