高一英语表语从句讲解

表语从句引导词注意事项
1. that引导表语从句时不能省. 2. if不能引导表语从句. 3.除that外的所有引导词都有自己 的意义。 4. 除that, whether外的所有引导 词都须在从句中充当相应的成 分
1. That’s ___ the Party called on us to do.
引导词的用法（四）
who 在表语从句中充当 主语、宾语也可用（whom) 谁 ______________表示____. 或表语 1. 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 _____________ 定语,表语 其中哪一个 。如： 表示
名词主语+be+that引起的表语从句
主语名词常常是 表示事实，真理的名词，如：fact, truth 表示看法，观点、问题、麻烦的名词， 如：idea, opinion, belief, view, news, advice, feeling, suggestion, plan, trouble, question, problem, 1.The fact is that our team has won the game. 2.The truth is that she was the very person we are looking for.
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.
A. why
B. what
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C. how
D. that
2. The reason is ___ he is unable to operate the machine. A. because B. why C. that 3 .That is ___ they separated. A. that A. what B. what C. which D. where 4.Jane is no longer ___ she was four years ago. B. which C. that D. when D. Whether
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 that来引导 because _________,而不能由_______ 引导; because 引导表语从句时只能用于 It/That/This is /was because… ________________________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.
Predicative Clauses 表语从句
表语从句的定义：在复合句中作表语的 从句叫做表语从句。表语从句对主 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。 Eg.That is why he didin’t come.
引导词的用法（一）
既不充当成分 that在表语从句中 , 没有意义 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.
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 .
引导词的用法（二） • whether在表语从句中表 “是否” ,但不 充当句子的成分。if 不能 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.
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） 由as if ,as though引导表语从句，表 示好像。句子中的系动词常用look, appear, seem等。 1.It looks as if it was doing to rain. 2.The young man with long hair looks as if he were a girl.
引导词的用法（三）
主语、宾语或表语 what 在表语从句中充当______________ 什么，什么样子，或所…的（人或事） 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.