? 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.
What I want to say is that I am tired.
? 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。
At that time, it seemed as if I couldn't 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
That's because he didn't understand me. 那是因为他没有理解我。 (That's because...强调原 因) That's why he got angry with me. 那正是他对我生气的原因。 (That's 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 didn't 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。
? 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。
? 1. 连系动词be，appear，seem，look等之后可以跟 表语从句。 It was because he didn't 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。
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。 That's 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 is why he didn't come here. 这就是他为 何没到这儿来的原因。
? 2）whether My question is whether he left （or not）. 我的问题是他是否离 开了。 注：if不能引导表语从句。
? 3）that The fact is that he left. 事实 是他离开了。 The truth is that I didn't go there. 事实是我没去那儿。
? 4）because，as，as if，as though It's just because he doesn't know her. 这是仅仅因为他不认识她。 Things are not always as they seem to be. 事物并不总是如其表象。 He looks as if he's tired. 他好像累了。
1. The question is ________ we will have our sports meet next week. A. that B. if C. when D. whether 2．The reason why he failed is ________he was too careless. A. because B. that C. for D. because of 3. Go and get your coat. It’ s ________you left it A. where B. there C. there where D. where there
4．The problem is _________to take the place of Ted A. who can we get B. what we can get C. who we can get D. that we can get 5. What I want to know is ______ he likes the gift given by us. A. that B. if C. whether D.不填 6. The reason is_________I missed the bus. A. that B. when C. why D. what
7. The reason why he hasn’t come is ___________. A.because his mother is ill B. because of his mother’s being ill C. that his mother is ill D. for his mother is ill 8. —He was born here. -- That is _______ he likes the place so much. A. that B. what C. why D. how 9.That is ______ Lu Xun once lived. A. what B. where C. that D. why
that/what的区别 1．_______your father wants to know is________ getting on with your studies. A. What; how are you B. That；how you are C. How；that you are D. What；how you are 2. The trouble is__________we are short of tools. A. what B. that C. how D. why that 3. America was __________was first called “India” by Columbus. A. what B. where C. the place D. there where
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