定语从句与虚拟语气.ppt

Revision： 定语从句的功用： 一、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。 表语从句两大要素: 除that外的所有引导词都有自己的意义。 除that,whether外的所有引导词都须在从句中充当相应的成分。 一些引导词的用法（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. 一些引导词的用法（二） 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. 一些引导词的用法（三） 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. 一些引导词的用法（四） 当主句的主语为reason,或者是why由引导的从句时,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.如: The reason why I was late was that I missed the train. I was late. It/That/This was because I missed the train. 一些引导词的用法（五） 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: What the doctor really doubts is whether my mother will recover from the serious disease soon 一些引导词的用法（六） * The Predictive Clause 相当于一个形容词，修饰一个名词或代词（即先行词）。常紧跟在先行词后，作定语用。 如：I don’t like the man who wears a beard. 宾语从句的功用： 相当于一个名词，作及物动词、 形容词或介词后的宾语 表语从句的功用： 如：I don’t know where I can got so much money. It depends on whether we have enough money. I am sure that he will come this afternoon. 相当于一个名词，作连系动词 如:be,look,taste,seem 等后的表语。 二、表语从句的表现形式 1.由从属连词引导。如：“that”,“whether” The question is whether we should ask them for help. The trouble is that he has never done the work before. 2.由连接代词引导。如：“what” “who”“whom”“whose” “which” Guilin is not what it used to be. What she wants to know is which dress she should buy. 3.由连接副词引导。如：“when”“