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定义

表语从句定义：

A

The problem is puzzling.

这个问题令人困惑

主语,连系动词,形容词作表语

The problem is when we can get a pay rise.

问题是什么时候我们可以得到加薪.

主语 连系动词 一个句子作表语---表语从句

B

连接表语从句的连接词有：that, what, who, when, where, which, why,whether,how.

He has become a teacher.

他已经成为一名教师。

He has become what he wanted to be ten years ago.

他已经成为了他xx年前想成为的。

She has remained there for an hour.

她曾在那里停留了一个小时。

She has remained where I stood yesterday for an hour. 她一直在我昨天站的地方站了一个小时。

His suggestion is good.

他的建议是好的。

His suggestion is that we should stay calm.

他的建议是，我们应该保持冷静。

The question is confusing.

这个问题令人困惑.

The question is when he can arrive at the hotel.

问题是，他什么时候可以到达酒店。

who will travel with me to Beijing tomorrow.谁与我明天将前往北京。 why he cried yesterday.

昨天他为什么哭。

how I can persuade her to join us in the party.

我怎么能说服她加入我们的派对。

whether the enemy is marching towards us.

是否敌人正向我们行进.

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注意

A

表语从句一定要用陈述语序。

False: The question is when can he arrive at the hotel.

Right: The question is when he can arrive at the hotel.

B

不可以用if，而用whether 连接表语从句(as if 例外）。

引导宾语从句时可以互换if/whether 位于介词后要用whether

位于句首时要用whether

引导表语从句，主语从句，同位语从句时要用whether

False: The question is if the enemy is marching towards us.

Right: The question is whether the enemy is marching towards us. Right: It looked as if he had understood this question.

C

不像宾语从句，在有表语从句的复合句中，主句时态和从句时态可以不一致。 Right: The question is who will travel with me to Beijing tomorrow. Right: The question is why he cried yesterday.

D

that在表语从句中不可以省掉。

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基本用法

表语从句只能置于主句之后，而主句的动词只能是联系动词。

名词性从句在be等系动词后作表语时被称为表语从句， 例如： The problem is how we can get the things we need.问题是我们怎样能弄到我们需要的东西。(how 在表语从句中充当方式状语)// The scissors are not what I need. 这把剪刀不是我所需要的。(what 在表语从句中充当宾语)// What I told him was that I would find him a good play. 我告诉他的是我会给他找个好剧本。(what在主语从句中作直接宾语， that作为表语从句的引导词在该表语从句中不充当句子成分， 不

能省略)// That is what I want to tell you.那就是我想要对你讲的。(what在表语从句中充当直接宾语)// That is why she failed to pass the exam. 那就是她考试不及格的原因。(why 在表语从句中充当原因状语)

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注意

“That is why...”是常用句型， 意为“这就是……的原因/因此……”， 其中why引导的名词性从句在句中作表语， 该句型通常用于针对前面已经说明过的原因进行总结， 又如： That is why you see this old woman before you know, Jeanne. 珍妮， 这就是现在这个老太婆出现在你面前的原因。(前文提到Jeanne对老妇人显得苍老憔悴深感诧异， 说话人对她讲述了其中的原因之后，用这一句来进行概括)。// That is why I came. 这就是我来的原因。

下面是两个与“That is why...”形式相似的结构， 它们与“That is why...”结构之间的关系要能够辨析清楚：

(1)“That is why...”与“That is the reason why...”同义， 只不过从语法结构上讲， “That is the reason why...”中why引导的是—个定语从句， 将其中的the reason去掉则与“That is why...”结构一样， 例如：

That is (the reason) why I cannot agree. 这就是我不能同意的理由。

(2)“That is because...”句型中从属连词because引导的名词性从句在此作表语， 这也是个常用句型， 意为“这就是为什么……/因为……”。“That is because...”与“That is why...”之间的不同在于“That is because...”指原因或理由， “That is why...”则指由于各种原因所造成的后果， 例如：

He did not see the film last night. That is because he had to help his little sister with her homework.昨天晚上他没有去看电影， 那是因为他得帮助他的妹妹做作业。(第一句话说明结果， 第二句话说明原因)

He had seen the film before. That is why he did not see it last night.他以前曾看过那部电影， 因此他昨天晚上没有去看。(第一句话说明原因， 第二句话说明结果)

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案例分析

［考题1］

The traditional view is ____ we sleep because our brain is “programmed” to make us do so. (20xx上海)

A. when B. why C. whether D. that

［答案］ D

［解析］ 下划线处之后是包含一个原因状语从句的表语从句， 如果看不出它是充当整个句子结构的表语从句将难以把握整个句子的意思。因此， 应选择可引导名词性从句且不充当任何成分的that。

［考题2］

You are saying that everyone should be equal, and this is ____ I disagree. (20xx)

A. why B. where C. what D. how

［答案］ B

［解析］ 下划线处的引导词引导系动词is后的表语从句并在该表语从句中充当地点状语(“disagree”属于不及物动词， “I disagree”本身是完整的主谓结构)， 下划线应填入引导词where， 表语从句“where I disagree”的意思是“我不同意之处、 我不同意的地方”。

［考题3］

— I drove to Zhuhai for the air show last week.

— Is that ____ you had a few days off? (1999)

A. why B. when C. what D. where

［答案］ A

［解析］ 下划线处的引导词引导与系动词is连用的表语从句并在该表语从句中充当原因状语， 下划线应填入表示“因此……”(指因某种原因所造成的结果)的引导词why。

［考题4］

____ she couldn’t understand was ____ fewer and fewer students showed interest in her lessons. (20xx上海)

A. What; why B. That; what C. What; because D. Why; that

［答案］ A

［解析］ 第一个下划线处的引导词引导主语从句并在该主语从句中充当宾语， 特指她所不理解的事情， 应填入关系代词型的引导词what； 第二个下划线处表示“因此……”(指因某种原因所造成的后果， 由why引导对应的名词性从句)而不是“为什么……”(指原因、 理由， 由because引导对应的名词性从句)， 应填入引导词why。

［考题5］

____ made the school proud was ____ more than 90% of the students had been admitted to key universities. (20xx上海春)

A. What; because B. What; that

C. That; what D. That; because

［答案］ B

［解析］ 第一个下划线处的引导词引导主语从句并在该主语从句中充当主语， 特指令校方骄傲的事情， 应选用关系代词型的引导词what； 第二个下划线处引导表语从句表示原因、 理由， 应由that引导对应的名词性从句。

［考题6］

— Are you still thinking about yesterday’s game?

— Oh, that’s ____. (20xx北京春)

A. what makes me feel excited B. whatever I feel excited about

C. how I feel about it D. when I feel excited

［答案］ A

［解析］ A选项的意思是“令我感觉激动的事物”； B选项的意思是“我觉得激动的任何事物”； C选项的意思是“我对它感觉的方式”； D选项的意思是“令我感觉激动的时间”。四个选项中A最适合跟代表“game”的主语that对应， 充当表语从句。

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表语从句与宾语从句的关系

宾语从句和表语从句都属于名词性从句。其作用跟名词在句中的作用相同。故充当宾语的句子叫宾语从句，充当表语的句子叫表语从句。

宾语从句

(1)对于宾语从句要掌握以下三点

①语序: 从句的语序必须是陈述句语序, 即“主语 + 谓语”这种形式。

②时态: 当主句是一般现在时或一般将来时的时候, 从句可以是任何时态, 而当主句是一般过去时的时候, 从句, 从句时态必须是过去时范围的时态, 即(一般过去时, 过去进行时, 过去完成时, 过去将来时)。

③连接词: 当从句意思完整, 主句意思肯定时, 连接词用that, 且可以省去, 当从句意思完整, 主句意思不确定或含否定含意时, 常用if或whether(是否), 当从句意思不完整时, 连接词则是代替不完整部分的特殊疑问词。

表语从句

在句子中起表语作用的从句叫做表语从句，位于主句系动词的后面。表语从句的引导词和主语从句的引导词相同。也是名词性从句的一种。

如： What the police want to know is when you enred red the room警察想知道的是你什么时候进的房间。

The The trouble is that we are short of funds困难是我们缺乏资金。

This This is what we should do这是我们应当做的。

That”s s why I want you to work there那就是我要你在那儿工作的原因。 His His first question was whether Mr. Smith had arrived yet他的第一个问题是史密斯先生到了没有。

注意：从句中的疑问句用正常语序，即陈述语序。

as as if, as though, because也可用来引导表语从句。

She She seems as if she had done a great thing她看起来好像做了一件大事。

It It is because you eat too much那是因为你吃得太多了。

 

第二篇：英语六大从句用法总结

英语中六大从句用法总结

从句是指用于复合句中担当某个句子成分的主谓结构。虽说从句自身的句子结构是完整的， 但是它不能视为独立的句子，因为它离开了主语就无法独立、完整地表达意思。按其所能表达的意义而言,它相当于一个词或是一个词组.

按从句的句子功能划分（也就是按从句在句子中所担任的成分来划分），从句可分为：主语从句、宾语从句、 表语从句、同位语从句、定语从句和状语从句。

1.主语从句

1）主语从句可直接位于主语的位置，如果从句较长，谓语又较短，可用it作形式主语，而将从句放在句末。常见的句型有：

*It is a fact\a pity\a question\good news that...

*It seems\appears\happened\has turned out that...

*It is clear\important\likely\possible that...

*It is said\reported\estimated\has been proved that...

It is said that comic books create a connection between people of the same generation.

It seems that the performance is very useful.

2)what引导的主语从句表示“...的东西时”，一般不用it作形式主语。

What we lack is experience.

3)what,who,when,why,whether等词含有各自的疑问意义，但它们引导的主语从句，都用陈述语序。

How the plan is to be carried out should be discussed again.

I did know why I felt like crying.

2.宾语从句

1）宾语从句可位于及物动词、介词和某些形容词后。连词that常可省略。介词后一般接疑问词引导的宾语从句。in that(因为),except that(除了),but that(只是）已构成固定搭配，其他介词后一般不接that引导的宾语从句。

*I promised that I would change the situation.

*All this is different from what American young people would say about friendship.

*He is certain that watching so much television is not good for children.

*This article is well-written except that it is a bit too long.

2)宾语从句后如有宾补，要用形式宾语it来代替，而把宾语从句移至宾补之后。 He has made it clear that he would not change his mind.

3)在think,believe,suppose,expect等动词后的宾语从句中，如果谓语是否定的，一般将否定词移至主句谓语上，宾语从句则变成肯定形式。

He didn't think that the money was well spent.

3.表语从句

表语从句出现在结构为“主语+系动词+表语从句”的句子中。表语从句除可用that,what,when,why,whether,how等引导外，还可由because,as if(though)等引导。that常可省略。如主句主语为reason,只能用that引导表语从句，不可用because.

Perhaps the most important thing to remember is that there is no one common type of life in America.

The reason why so many people died there is that there were not enough food supplies.

It looks as if successful international cultural communication will make the world smaller.

4.同位语从句

同位语从句用于对前面出现的名词作进一步说明，一般用连词that引导，由于先行名词的意义不同，也可用whether,who,when,where,what,why,how等引导。常见的先行名词有fact,idea,belief,news,hope,conclusion,evidence,suggestion,order,problem,report,decision.有时由于谓语较短，将同位语从句位于谓语之后。

She finally made the decision that she would join the fashion show.

I had no idea how many books I could borrow at a time.

The news came that their team had won the championship.

5.定语从句

定语从句所修饰的先行词可以是名词或代词，也可以是一个句子。定语从句通常位于先行词之后，由关系代词或关系副词引导。

*限制性定语从句

限制性定语从句修饰先行词，对先行词起修饰作用，紧接先行词之后，无逗号，若省去，原句意思不完整。引导定语从句的关系代词有who,whom,whose,which,that等。who,whom,whose用于指人，whose有时也可指物，相当于of which；which用于指物；that既可指人也可指物，但只用于限制性定语从句中。关系代词除了引导定语从句，替代先行词外，还在从句中担任主语、宾语、定语等。

The computers and cables which make up the Internet are owned by people and organizations.

Those who live alone or who are sick may have trouble in getting close to other people.

The girl whose parents died in an accident is living with her grandmother.

1)当先行词是all,anything,everything,something,nothing等不定代词或先行词前有first,last,any,few,much,some,no,only以及形容词最高级修饰时，只能用关系代词that引导从句。 That is all that I've heard from him.

He's the first person that I'm going to interview this afternoon.

2)关系代词的省略

在从句中作宾语的关系代词常可省略。关系代词紧跟介词，作介词宾语时不可用that，只可

用which或whom引导从句，并且不可省略，但当介词位于宾语从句句末时，作为介词宾语的关系代词仍可用that，也可省略。

This is one of those things with which we have to put up.

This is one of those things (which\that) we have to put up with.

3)引导定语从句的关系副词有when,where,why等。关系副词在从句中作状语，意义上相当于一个“介词+which”的结构。

Even in comic books where(=in which) there are no words,the stories are fully expressed through the drawings.

No one knows the reason why(=for which) he was so angry that day.

5.定语从句

*非限制性定语从句

非限制性定语从句既可修饰先行词，也可修饰整个主句，起补充说明作用，与主句之间有逗号隔开，若省去，原句意思不受影响。不可用that引导非限制性定语从句。关系词不可省略。

Every object has a gravitational pull,which is rather like magnetism.

*“介词+which\whom\whose”引导的定语从句

“介词+which\whom\whose”可引导限制性定语从句，也可引导非限制性定语从句，该结构中介词的选择取决于从句谓语动词的固定搭配，或先行词的习惯搭配。

This is the computer on which he spent all his savings

It is written by a person with whom we are all familiar.

*as引导的定语从句

as引导的定语从句主要用于“such...as”及“the same...as”的结构中，代替先行词是人或物的名词。as引导非限制性定语从句时，代替整个主句，从句可位于主句之前、之后或中间。

These are not such problems as can be easily solved.(as代替先行词problems)

As is mentioned above,no single company or group can control what happens on the Internet.(as代替主语)

6.状语从句

*时间状语从句

引导时间状语从句的从属连词和词组有：

1）when,whenever,while,as,after,before,since,till,until,once等。

We have learnt quite a lot about it since we came here.

2)as soon as,hardly(scarcely)...when,no sooner...than,each(every) time,the

moment,immediately(that)等。

As soon as I sent an e-mail message,I received positive responses.

The moment he heard the good news,he jumped with joy.

*地点状语从句

引导地点状语从句的连词是where,wherever.

Wherever she went,she took her little daughter with her.

*原因、结果和目的状语从句

1）引导原因状语从句的从属连词有：because,as,since,now(that),seeing that,considering that,in that等。

Considering that he is a freshman,we must say he is doing well.

2)引导结果状语从句的连词有：so...that,such...that

,so that,that,so等。

Mickey Mouse is so attractive that the children are reluctant to leave.

3)引导目的状语从句的连词有：so that,in order that,for fear that,lest等，从句常使用may,might,can,could,would等情态动词。

We got up early this morning so that we could catch the first bus to the railway station.

*条件和让步状语从句

1）引导条件状语从句的连词和词组有if,unless,as(so) long as,on condition that,in case,provided(providing) that,supposing等。

As long as you have the right equipment,you can use a telephone line to transmit computer data.

2)引导让步状语从句的连词和词组有though,although,whether,even though,even if,no matter what(when,how...),whatever(whenever,wherever,however....)等。though,even if等引导状语从句可转换成含有as的部分倒装结构，具有强调意义。其结构为“形容词（副词、动词、名词）+as+主语+谓语”。

No matter what you may say,I would not change my mind.

Young as he is,he is quite experienced in this work.(=though he is young)

Child as he is,he can speak English fluently.(=though he is a child)

*方式状语从句

引导方式状语从句的连词有as,just as,as if,as though等。as if,as though引导的状语从句中，谓语动词常用虚拟语气，表示与事实相反。

The young man made the experiment just as the teacher had taught him.

Everything went on as usual as if nothing had happened.