My anger is because you haven’t written to me for a long time.
Why were you absent from the meeting ? Was it because you were ill?
你为什么不来出席座谈会？是病了么？
.
15
that, why 与 because 引导表语从句时的 区别
（表）
The question is who will do it.
（表）
表语从句
.
5
可接表语从句的系动词有：
1. be 2. feel, seem, look, appear, sound,
taste, smell 3. stand, lie, remain, keep, stay 4. become, get, grow, turn, go, come,
(与事实不符)
• Dark clouds are gathering. It looks as if it’s
going to rain.
.
14
引导词的用法（二）
because
because引导表语从句通常用于 “This/That/It is because…”结构中。而且 主语一般不用reason。
run, fall 5. prove, turn out
.
6
例句：
1. 这个故事听起来像是真的。
The story sounds true.
2. 他似乎知道这件事。
He appears to know this.
3. 这些桔子很好吃。
These oranges taste good.
.
7
1. This is an English-Chinese dictionary. 2. The dinner smells good. 3. He fell in love. 4. My job is to teach you English. 5. The question is who will do it.
主语 谓语
宾语
（及物动词）
.
11
引导词的用法（一）
1.从属连词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。
（主语） + （系动词） + 引导词 + 简单句
What I want to say is that I am tired
主语 + 系动词 + 引导词 + 简单句
.
10
观察思考：
指出句子成分
Henry was an American businessman.
主语 连系动词
表语
Henry met an American businessman.
are, was, were, seem, look, taste, remain 等之后，对主语进行解释，说明，使主 语的内容具体化。
.
3
The question is who will do it.
表语从句放在连系动词 之后，充当复合句中的表语。
.
4
The question is difficult.
The Predicative Clause 表语从句
.
1
Definition
• 在复合句中起名词作用的从句叫做名词性从句。它包 括主语从句、宾语从句、表语从句和同位语从句。
• That the earth turns around the sun is known to all.
主语从句
• I want to know whether (if) he has passed the
.
12
as if, as though 引导的表 语从句
as if/though引导的表语从句常置于连系动词look,
seem, sound, be, become等后面，常用虚拟语气， 表示不存在的动作或状态。
e.g. It sounds as if/though somebody was knocking at the door.
主语+连系动词（look /seem /appear…） +that/as if从句
.
13
•*as if/as though引导的表语从句如果是事 实，就用陈述语气，如果与事实不符，就 用虚拟语气(主句一般现在时，从句就用 一般过去时，be变成were。主句是一般
过去时，从句用过去完成时)。
• It looks as if he were her own father.
•三者均可引导表语从句，但 that 没有词义， 而 why 和 because 有自己的意思；另外， 前者强调结果，后者强调原因。如：
•The reason was that you don’t trust her. 原因 是你不信任她。
•The fact is that they are angry with each other. 事实是他们生彼此的气。
•He was ill. That’s why he was sent to the hospital. 他病了，所以被送到医院来。
•He was sent to the hospital. That’s because he was ill. 他被送到医院.，是因为他生病了。16
.
8
2. 表语从句的构成
主语 + 系动词 + 引导词 + 简单句
This is
why he did it.
表语从句放在连系动词之后，充当复
合句中的表语。
.
9
His suggestion is that we should stay calm. 引导词
That is why she宾语从句
• The trouble is that he has never done表th语e w从or句k before.
The news that the plane would take off on time made
everybody happy. 同位语从句
.
2
在复合句中做表语的从句，叫做表 语从句。它位于主句的系动词am , is,