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表语从句一．定义：表语从句就是用一个句子作为表语。
说明主语是什么或者怎么样，由名词、形容词或相当于名词或形容词的词或短语充当，和连系动词一起构成谓语二．引导表语从句的关联词的种类：(1)从属连词 that。
在从句中不做成分。
如： The trouble is that I have lost his address.麻烦是我把他的地址丢了。
The reason was that he was late for school.原因是他上学迟到了(2) 从属连词 whether, as, as if。
如： 1. He looked just as he had looked ten years before. 他看起来还与十年前一样。
2. The question is whether they will be able to help us.问题是他们是否能帮我们。
注：（从属连词 if 一般不用来引导表语从句，但as if 却可引导表语从句）。
如： All this was over twenty years ago, but it as’ifsitwas only yesterday.这都是 20 多年前的事了，但宛如昨天一样。
The key is whether we can solve the problem.关键是我们是否能解决问题。
注：（能跟表语从句的谓语动词一般为系动词be, seem, look，sound等）。
如： 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)连接代词 who, whom, whose, what, which, whoever, whatever, whichever 在表语从句中做主语、宾语等。
表语从用法1.定义：用作表语的从句叫做表语从句2.引导表语的从句的关联词的种类（1）从属连词that. The trouble is that I have lost his address.The reason was that he was late for school.(2)从属连词whether, as, as ifHe looked just as he had lookedten years before.The question is whether they will be able to help us.注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句。
All this was over twenty years ago, but it’s as if it was only yesterday. The key is whether we can solve the problem.It looked as if it was going to rain.注：能跟表语从句的谓语动词一般为系动词be, seem, look, sound等He looked just as he had looked ten years before.It sounds as if someone is knocking at the door.(3) 连接代词who, whom, whose, what, which, whoever, whatever, whichever 在表语从句中做主语、宾语等。
The problem is who we can get to replace her.That was what she did this morning on reaching the agreement.My question is who left.(4) 连接副词where, when, how, whyWhat I wonder is when he left. This is where they once lived.That is why he didn’t come here.The question is how he did it.(5) 连词because 可引导表语从句。
英语表语从句的知识点归纳
英语表语从句的知识点归纳
1）表语从句
1.定义：用作表语的`从句叫做表语从句。
2.构成：关联词+简单句
3.引导表语从句的关联词的种类：
（1）从属连词that.
如：
The trouble is that I have lost his address.麻烦是我把他的地址丢了。
（2）从属连词whether，as，as if.
如：
He looked just as he had looked ten years before.他看起来还与十年前一样。
The question is whether they will be able to help us.问题是他们是否能帮我们。
注：从属连词if一般不用来引导表语从句，但as if却可引导表语从句，如：
All this was over twenty years ago，but its as if it was only yesterday.
这都是20多年前的事了，但宛如昨天一样。
能跟表语从句的谓语动词一般为系动词be，seem，look等。
如：It looked as if it was going to rain.看起来天要下雨了。
（3）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。
表语从句例句100句带解析表语从句是在复合句中充当表语的从句，位于系动词之后，对主语进行解释、说明或描述。
以下是 100 个表语从句的例句及解析：1、 The problem is that we don't have enough time （“that we don't have enough time”在句中作表语，解释说明“the problem”的具体内容，即“我们没有足够的时间”。
）2、 My suggestion is that we should start early （“that we should start early”表明“我的建议”是“我们应该早点出发”。
）3、 The fact is that he has never been there （“that he has never been there”说明了“事实”是“他从未去过那里”。
）4、 His concern is that she might be late （“that she might be late”指出“他的担忧”在于“她可能会迟到”。
）5、 The reason why he is absent is that he is ill （“that he is ill”解释了“他缺席的原因”是“他生病了”。
）6、 Our hope is that they will come （“that they will come”表示“我们的希望”是“他们会来”。
）7、 The question is whether we can finish the work on time （“whether we can finish the work on time”说明“问题”在于“我们能否按时完成工作”。
）8、 What I want to know is how he managed to do it （“how he managed to do it”回答了“我想知道的”是“他如何做到的”。
表语从句用法详解(例句丰富)一、表语从句的引导词引导表语从句的词有连词that, whether，连接代词和连接副词，关系代词型what，以及as if, as though, because等连词。
1. 由that引导The fact is that he doesn’t really try. 事实是他没有做真正的努力。
The trouble is that I have lost his address. 麻烦的是我把他的地址丢了。
My suggestion is that we should tell him. 我的建议是我们应该告诉他。
His sole requirement was (is) that the system work. 他唯一的要求是这个制度能起作用。
My idea is that we should start making preparations right now.我的意见是我们马上就开始做准备工作。
2. 由whether引导The question is whether the film is worth seeing. 问题是这部电影是否值得看。
【注意】whether 可引导表语从句，但与之同义的if却通常不用于引导表语从句。
3. 由连接代词引导You are not who I thought you were. 你已不是我过去所想像的人。
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 who (m) we should trust. 问题是我们应当相信谁。
What I want to know is which road we should take. 我想知道的是我们应走哪条路。
4. 由连接副词引导The problem is how we can find him. 问题是我们如何找到他。
智课网IELTS备考资料雅思写作语法：表语从句讲解摘要：为了让大家在本次雅思考试当中取得好成绩，小编特意为大家准备了的雅思写作语法：表语从句讲解相关内容，本节内容主要针对的就是本次考试的题型来整理的，希望能帮助大家在本次考试当中取得好成绩。
一、表语从句讲解之表语从句的基本介绍(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。
(二)、表语从句的构成：关联词+简单句(三)、引导表语从句的关联词的种类：1. 连接代词who，whom，whose，what，which，whoever，whatever，whichever连接副词 where，when，how，whyThe 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。
2. 可接表语从句的连系动词有be，look，seem，sound，appear等。
The question remains whether they will be able to help us.问题还是他们能否帮我们。
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。
3. 从属连词whether，as，as if / though引导的表语从句。
It sounds as if someone is knocking at the door.听起来好像有人在敲门。
