英语语法之表语从句.ppt

Unit3 Grammar 表语从句 一、表语从句的定义： 表语从句放在连系动词之后，充当复合句中的表语。 The question is who will do it. 二、表语从句的构成： （系动词）+ 引导词+简单句 What I want to say is that I am tired. 三、引导表语从句的关联词的种类： 1. 可接表语从句的连系动词有be（is, am, are, was, were）, look, seem, sound, appear等。China is no longer what she used to be. 今日的中国不再是过去的中国了。 The question remains whether they will be able to help us. 问题还是他们能否帮我们。 At that time, it seemed as if I couldnt think of the right word. 当时，我似乎怎么也想不出一个恰当的字眼来。 2. 从属连词whether, as, as if / though引导的表语从句He looked just as he had looked ten years before. 他看起来还与十年前一样。 It sounds as if someone is knocking at the door. 听起来好像有人在敲门。 3. because, why引导的表语从句Thats because he didnt understand me. 那是因为他没有理解我。　(Thats because...强调原因) Thats why he got angry with me. 那正是他对我生气的原因。　(Thats why...强调结果) what引导的主语从句表示结果或名词reason作主语时，后面的表语从句表示原因时要用that引导，不宜用because。 The reason why I was sad was that he didnt understand me. 我难过的原因是他没有理解我。 4. 连接代词who, whom, whose, what, which, whoever, whatever, whichever 连接副词 where, when, how, why。如：  The problem is who we can get to replace her. 问题是我们能找到谁去替换她呢。  The question is how he did it.? 问题是他是如何做此事的。  That was what she did this morning on reaching the attic. 那就是她今晨上了阁楼干的。 5. 从属连词that。that在表语从句中不充当任何句子成分，也没有任何意义。如： The trouble is that I have lost his address.? 麻烦是我把他的地址丢了。 6. 使用虚拟语气的表语从句在表示建议、劝告、命令含义的名词后的表语从句，谓语动词需用should+动词原形 表示，should可省略。常见的词有：advice, suggestion, order, proposal, plan, idea等。?My suggestion is that we (should) start early tomorrow. 我的建议是我们明天一早就出发。 四、应注意的问题： 1. 连系动词be，appear，seem，look等之后可以跟表语从句。It was because he didnt pass the exam. It seems（that）he was late for the train. It appears that she was wrong. It seems to me that we should answer for this. It appears to her that he wants to teach us all he has.  2. 引导表语从句的引导词有以下几类。 1）wh-疑问词My question is who left. 我想问的是谁离开了。What I wonder is when he left. 我想知道他是何时离开的。Thats what he wants. 那是他想要的。This is where they once lived. 这就是他们曾经住过的地方。That