? 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 chemist
ry. 宾语从句 ? The trouble is that he has never done the work before. 表语从句
The news that the plane would take off on time made everybody happy. 同位语从句
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, 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。
? ? ? ? ? ?
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事实是他们有着不同的观点。 The fact is that they have different opinions 问题是她明天是否会来。 The question is whether she will be back tomorrow 那就是他们如此忽忙离开的原因。 That’s why they left in such a hurry 问题是我们应该去哪里。 The problem is where we should go 问题是我们怎么样才能与他取得联系。 The question is how we can get in touch with him
That’s what makes me feel excited 2。 他的建议是我们要立刻完成工作。 His suggestion is that we (should) finish the work at once. 3。 看起来好像要下雨了。 ?It looks/seems as if it is going to rain. 4。 他看起来好像生病了。 He looked as though he was ill.
5. 问题是我们不能与他取得联系。 The problem is that we didn’t get in touch with him. 6.这就是亨利如何解决问题的。 This is how Henry solved the problem. 7.这就是Tom正在阅读的东西。 This was what Tom was reading. 8.事实是我从来没有去过那里。
The truth is that I have never been there.
9.他迟到的原因是他起床迟了。 The reason why he was late was that he got up late. 10.这就是我们如何克服困难的。 This is how we overcame the difficulties. 11.这就是他昨天缺席的原因。 That is why she was absent yesterday. 12.这个房子就是鲁迅曾经住的。 The house is where Lu Xun once lived.
13. 她看起来好像做了一件大事. She seems as if she had done a great thing. 14. 警察想知道的是你什么时候进的房间. What the police want to know is when you entered the room. 15.这是我们应当做的.
This is what we should do. 16.困难是我们缺乏资金. The trouble is that we are short of funds.
17.那就是我要你在那儿工作的原因。 That's why I want you to work there. 18.他的第一个问题是史密斯先生到了没有。 His first question was whether Mr. Smith had arrived yet. 19.那是因为你吃得太多了。 It is because you eat too much. 20.今日的中国不再是过去的中国了。 China is no longer what she used to be.
引导表语从句的词有： 连词; that， whether, 连接代词：what, who, which, 连接副词：when, where, how, Why,等。除此之外，还可由as if , as though, 或because 引导。that有时可以省略。
常用连词注意事项“ 从属连词that在从句中不作成分，也没有实在意 义，在口语中一般可以省略，而whether,虽然在 从句中不作成分，但含有是否的意义。连接代词 和连接副词一般都表示疑问，但what,when,where, 等连词有两种含义，一种表示疑问，一种表示陈 述，相当于the thing that, the time when, the place where 等。If不能引导表语从句。
1.这就是我们发现的兴趣所在。 This is where (=the place where) we found the interest. 2.我今天的话题就是大多数科学家正在研究的 课题。 My today topic is what (= the thing that ) most scientists are researching. 3. 我们的问题是咱们什么时候出发。
Our question is when we set out.
1.Where, why, because, how等引导的从句作this is 和that is 的表语时，表示具体的地点，原因， 方 式等。 这就是我们推迟会议的原因。 This is why we put off the meeting. 2. 主语是reason 时， 表语从句常用that, 不用 because. 他缺席的原因是他生病了。 The reason for his absence was that he was ill.
The reason why he was absent was that he was ill.
主语是 idea, suggestion, request，advice, order,等 名词时, 作表语从句的动词为原形动词或should+原 形动词。 1.我的建议是我们应该去帮助他。 My suggestion is that we (should) go and help him. 2. 我们唯一的请求就是尽快解决这个问题。 Our only request is that this(should) be settled as soon as possible.
1.那是因为他没有理解我。 That‘s because he didn’t understand me. （That‘s because…强调原因） 2.那正是他对我生气的原因。 That’s why he got angry with me. （That's why…强调结果）
1. Einstein’s most famous theory is ___ we call the Theory of Relativity. A. what B. that C. which D. why 2. My suggestion was that the meeting ___ till the next week. A. to put off B. be put off C. should put off D. was put off
3. _____ he is living now is not known to anybody. A. When B. If C. Whether D. What 4. ___ I can’t understand is ___ he changed his mind. A. That; that B. What; why C. Which; how D. That; why
5. The traditional view is ______ we sleep because our brain is “programmed” to make us do so. A. when B. why C. whether D. that