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表语从句引导词有哪些
表语从句引导词如下：
1、That
当用that引导表语从句时，that仅仅起一个连接的作用，无词义，也不用翻译，在表语从句中不充当任何句子成分，除了在部分口语句子中，通常不省略，举例：
The fact was that he had forgotten about it.
事实上，他已经把这件事忘了。
2、Whether
当表语从句要表达“是否”的含义时，连接词要用whether，并且绝对不能用if进行替换，举例：
-The trouble was whether we could manage it ourselves or not.
问题是我们自己能不能做得到。
3、疑问代词
疑问代词指这些：who，whom，whose，whoever，what，whatever，which，whichever 它们不仅起连接作用，又充当句子成分，举例：
The problem is not who will go, but who will stay.
问题不是谁去，而是谁留下来。
4、疑问副词
疑问副词指那些表示地点、时间、原因、方式等的词：where、when、how、why 等，它们在表语从句中既起着连接作用，同时充当从句的句子成分，一般作状语，举例：
This is where you came in.
这就是你进来的地方。
5、特殊引导词
特殊的引导词指这几个：（just) as, as if, as though, because 引导的表语从句，举例：
John looked just as he had looked twenty years before.
约翰看起来还与二十年前一样。
表语从句because的用法
表语从句用法小结 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. 可接表语从句的连系动词有be，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 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 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 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 didn't pass the exam. 那是因为他没有通过考试。 It seems（that）he was late for the train. 看来他没搭上火车。 It appears that she was wrong. 看来她错了。 It seems to me that we should answer for this. 在我看来，我们似乎应该对此事负责。 It appears to her that he wants to teach us all he has. 在她看来，他似乎要把他所会的都教给我们。 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。 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。
一下主语从句表语从句宾语从句同位语从句定语从句的引导词分别是什么
分别是：
主语从句, that ， what
表语从句, that ,what跟在be动词后
宾语从句, what ,whom/whomever
同位语从句,the fact /the truth/the evidence that; the reason why
定语从句, which/who/that/whose。
英语各种从句的引导词分别是什么
17.1 引导名词性从句的连接词
引导名词性从句的连接词可分为三类：
连接词：that,whether,if 不充当从句的任何成分）
连接代词：what, whatever, who, whoever, whom,
whose, which.
连接副词：when, where, how, why
不可省略的连词：
1. 介词后的连词
2. 引导主语从句和同位语从句的连词不可省略。
That she was chosen made us very happy.
We heard the news that our team had won.
比较：whether与if 均为"是否"的意思。 但在下列情况下，whether 不能被if 取代：
1. whether引导主语从句并在句首
2. 引导表语从句
3. whether从句作介词宾语
4. 从句后有"or not"
Whether he will come is not clear.
大部分连接词引导的主语从句都可以置于句末，用 it充当形式主语。
It is not important who will go.
It is still unknown which team will win the match.
17.2 名词性that-从句
1）由从属连词that引导的从句叫做名词性that-从句。 That只起连接主句和从句的作用，在从句中不担任任何成分，本身也没有词义。名词性that-从句在句中能充当主 语、宾语、表语、同位语和形容词宾语，例如：
主语：That he is still alive is sheer luck. 他还活着全靠运气。
宾语：John said that he was leaving for London on Wednesday. 约翰说他星期三要到伦敦去。
表语：The fact is that he has not been seen recently. 事实是近来谁也没有见过他。
同位语：The fact that he has not been seen recently disturbs everyone in his office.
近来谁也没有见过他，这一事实令办公室所有的人不安。
形容词宾语：I am glad that you are satisfied with your job.
你对工作满意我感到很高兴。
2）That-从句作主语通常用it作先行词，而将that-从句置于句末，例如：
It is quite clear that the whole project is doomed to failure. 很清楚，整个计划注定要失败。
It's a pity that you should have to leave. 你非走不可真是件憾事。
用it作形式主语的that-从句有以下四种不同的搭配关系：
a. It + be +形容词+ that-从句
It is necessary that… 有必要……
It is important that… 重要的是……
It is obvious that… 很明显……
17.3 名词性wh-从句
1）由wh-词引导的名词从句叫做名词性wh-从句。Wh-词包括who, whom,. whose, whoever, what, whatever, which, whichever等连接代词和where, when, how, why等连接副词。Wh-从句的语法功能除了和that-从句一样外，还可充当介词宾语、宾语补语和间接宾语等，例如：
主语： How the book will sell depends on its author. 书销售如何取决于作者本人。
直接宾语：In one's own home one can do what one likes. 在自己家里可以随心所欲。
间接宾语：The club will give whoever wins a prize.
俱乐部将给得胜者设奖。
表语： My question is who will take over president of the Foundation. 我的问题是谁将接任该基金会主席职位。
宾语补足语：She will name him whatever she wants to. 她高兴给他起什么名字就取什么名字。
同位语： I have no idea when he will return.
我不知道他什么时候回来。
形容词宾语：I'm not sure why she refused their invitation. 我尚不能肯定她为什么拒绝他们的邀请。
介词宾语： That depends on where we shall go.
那取决于我们去哪儿。
2）Wh-从句作主语也常用先行词it做形式主语，而将wh-从句置于句末，例如：
It is not yet decided who will do that job.
还没决定谁做这项工作。
It remains unknown when they are going to get married. 他们何时结婚依然不明。
17.4 if, whether引导的名词从句
1）yes-no型疑问从句
从属连词if, whether引导的名词从句是由一般疑问句或选择疑问转化而来的，因此也分别被称为yes-no型疑问句从句和选择型疑问从句，其功能和wh-从句的功能相同， 例如：
主语：Whether the plan is feasible remains to be proved. 这一计划是否可行还有等证实。
宾语：Let us know whether / if you can finish the article before Friday. 请让我们知道你是否能在星期五以前把文章写完。
表语：The point is whether we should lend him the money. 问题在于我们是否应该借钱给他。
同位语：They are investigating the question whether the man is trustworthy. 他们调查他是否值得信赖。
形容词宾语： She's doubtful whether we shall be able to come. 她怀疑我们是否能够前来。
介词宾语： I worry about whether he can pass through the crisis of his illness. 我担心他是否能度过疾病的危险期。
2）选择性疑问从句
选择性疑问从句由关联词if/whether…or或whethe…or not构成，例如：
Please tell me whether / if they are Swedish or Danish. 请告诉我他们是瑞典人还是丹麦人。
I don't care whether you like the plan or not.我不在乎你是否喜欢该计划。
17.5 否定转移
1) 将think, believe, suppose, expect, fancy, imagine等动词后面宾语从句的否定词转移到主句中，即主句的谓语动词用否定式，而从句的谓语动词用肯定式。
I don't think I know you. 我想我并不认识你。
I don' t believe he will come. 我相信他不回来。
注意：若谓语动词为hope,宾语从句中的否定词不能转移。
I hope you weren't ill. 我想你没有生病吧。
2) 将seem, appear 等后的从句的否定转移到前面。
It doesn't seem that they know where to go.
看来他们不知道往哪去。
It doesn't appear that we'll have a sunny day tomorrow.
看来我们明天不会碰上好天气。
3) 有时将动名词，介词短语或整个从句的否定转变为对谓语动词的否定。
I don't remember having ever seen such a man.
我记得从未见过这样一个人。 (not否定动名词短语 having…)
It's not a place where anyone would expect to see strange characters on the street.
在这里，人们不会想到在街上会碰上陌生的人。
(anyone 作主语，从句中的谓语动词不能用否定形式。)
4) 有时状语或状语从句中否定可以转移到谓语动词前。
The ant is not gathering this for itself alone. (否定状语) 蚂蚁不只是为自己采食。
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