高考英语 表语从句讲解和练习 课件(共14张ppt).ppt

Predicative Clauses 表语从句 表语从句的定义：表语从句在复合句中作主句的表语。表语从句和主语指同一内容，它对主语进行解释、说明，使主语的内容具体化。 结构是“主语+系动词+表语从句”。 可以接表语从句的系动词有 be, look, remain, seem等。 引导词的用法（一） that在表语从句中 ,又 。 The fact is that he hasn’t yet recover from illness. The reason why he has to go is that his mother is ill in bed. 引导词的用法（二） whether在表语从句中表 ,但不充当句子的成分。if 引导表语从句.如: 1.What the doctor really doubts is whether my mother will recover from the serious disease soon. 2. The question is whether it is worth doing. 引导词的用法（三） what 在表语从句中充当______________ 表示____________________________. 1. The question is what caused the accident. 2. That mountain is no longer what it used to be . 3. What he told you was what had been discussed at the meeting. 引导词的用法（四） who 在表语从句中充当______________表示____. The problem is who could do the work 2. My trouble is who (whom) I can turn to. 引导词的用法（五） which 在引导表语从句时,常充当_____________ 表示 。如： I read about it in some book or another,but what I don’t know is which (book) it is. 引导词的用法（六） 引导词的用法（七） 当主句的主语为reason,或者是由why引导的从句时,与它们相关的表语从句用_________,而不能由_______ 引导; because 引导表语从句时只能用于________________________句型中. 1.The reason why I was late was that I missed the train. 2. I was late. It/That/This was because I missed the train. 引导词的用法（八） 当表语从句中主语、宾语、表语具备，但是还是要表示疑问含义，可以判断句子中缺少状语，常常用相应的特殊疑问词引导，有why, when, where, how等 This is how he did it. That is why the brothers wanted to make a bet. That’s why we’ve given you the letter. * 连接词：that / whether /as if /as though 连接代词：who / whom / whose / which / what 连接副词：when / where / why / how / because 1.The question is whether we can rely on him. 2.That’s because we were in need of money at that time . 3.He looked as if he was going to cry . 4.That’s why I was late . 既不充当成分 没有意义 “是否”