表语从句详解

一、表语从句概念

概念：在整个主句中充当表语这一成分的从句。

① He主语 is not 系动词 what he used to be表语（从句）.

随堂练习：

请找出下面句子中的表语从句

1. The question is wh克莱伯en he can arrive at the hotel.

分析：先找句子里的谓语动词，分别是is和arrive。Can不是动词，是情态动词，必须要和谓语动词连用才可以。一句话有且只有一个谓语动词。这里有两个动词，因此不是简单句，是复杂句，复杂句由一个主句和一个或多个从句组成，有时会有两个或以上主句出现，但是必须要有and这样的连词才三体船可以，这里没有连词，因此只能有一个主句，并且主句必须要出现。如果句子里有一个动词，这个动词就是主句里的，如果有两个动词，一个一定仍然是主句的，另一个才是从句的。整个句子其实是The question is sth的结构，只不过这里用when he can arrive at the hotel这个从句来代替sth这个表语，因此是表语从句。Is是系动词，根据“主系表”结构，is前面的成分是主语，后面的成分是表语。

2. The book is not what I need.

分析：先找句子里的谓语动词，是is和need。一个谓语动词在主句里，另一个在从句里。整个句子其实是The book is sth的结构，只不过这里用what I need这个从句来代替sth这个表语，因此是表语从句。整个句子里有个not，不影响结构，只是多了个否定的意思。

3. That is why she failed to pass the exam.

分析：先找句子里的谓语动词，是is和failed。一个谓语动词在主句里，另门德尔松e小调小提琴协奏曲一个在从句里，整个句子其实是That is sth的结构，只不过用why she failed to pass the exam这个从句来代替sth这个表语，因此是表汽车头枕语从句。

4. The argument is whether it rains tomorrow.

手机膜怎么贴分析：先找句子里的谓语动词，是is和rains。一个谓语动词在主句里，另一个在从句里，整个句子其实是The argument is sth的结构，只不过用whether it rains tomo光纤通讯rrow这个从句来代替sth这个表语，因此是表语从句。

5. The trouble is that we have no money.

分析：先找句子里的谓语动词，是is和have。一个谓语动词在主句里，另一个在从句里，整个句子其实是The trouble is sth的结构，只不过用that we have no money这个从句来代替sth这个表语，因此是表语从句。这里我们会发现that在从句里并没有充当成分。

二、表语从句常用引导词：that, what, which, who, how, whether, if

that 在名词性从句中只负责把从句引出来，不在从句里充当成分，这点和在定语从句里的用法不同，定语从句中that充当成分；

what 一般不用于定语从句，用在名词性从句里既引导从句，智商测试题国际标准60题又在从句里充当成分；

which 在名词性从句里含有“哪一个”的意思，通常有一定的选择范在线聊天网站围，而在定语从句里则没有意思，只是引导句子和充当句子成分；雅思真题里相关例句很少；

who 在从句里充当成分，指人，不指物；雅思真题里相关例句痘坑修复水很少；

how 表示“如何”，可以用来表示程度；

whether 表示“是否”，不管是主语从句，表语从句，宾语从句里都可以使用；

if用法比较复杂，有多种限制，而且雅思真题里相关例句很少；

剑桥真题例句：

1. Another factor that may boost the p辽宁舰舰长rospects for AI in the near future is that investors are now looking for firms using clever technology, rather than just a clever business model, to differentiate themselves.(C5P72L22)

2. The critical question now is whether this can become the norm, rather than the exception. (C5P87L41)

3. This is what would have made the whole thing work. (C10P73L25)

4. This was how, in 1660, the 圆珠笔画renowned French grammarians of the Port-Royal abbey near Versailles distilled the essence of language, and no one since has celebrated more eloquently the magnitude of its achievement. (C11P97L12)

表语从句填空题：

1. The result has bee煤炭行业n many people in these regions have turned to outside supplies of rice and other foods. (C5P86L28内搭)

2. The next factor to be determined is the goals should be assig服装店陈列ned by a manager or collectively set in conjunction with the employees. (C6P68L28)

3. However, more often than not now, due to a rapidly changing climate, that is not

happens. (C11P19L4)

4. The survey also assessed independent people over 65 were, and again found a st机械电子工程专业riking trend. (C6P44L30)

Key：that；whether；what；how

表语从句单选题练习：

1. To tell you the truth, this is _____ in the world.

A. which I have B. that I have C. what双鱼女 I have D. whether I have

2. Part of the reason Charles Dickens loved his own nov搞笑群名字el, David Copperfield, was ______雷火炼殿_ it was rather closely modeled on his own life.

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

3. This mu螺丝螺母seum is not ______ it was ten years ago.

A. that B. when C. which D. what

4. Grandma pointed to the hospital and said, “That’s _____ I was born.”

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

5.The mountain is no longer ________it used to be.

A. which B. that C. as D. what

6. The biggest question is _____ will take charge of the company.

A. whether B. that C. who D. if

7. I’d like to start my own business—that’s I’d do if I h德拉维多瓦ad the money.

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

8. Great changes have taken place everywhere in the city. It is no longer _____ it was 20 years ago.

A. what B. how C. that D. which

9. The trouble is ______ we can get there on time.

A. what B. that C. how D. whether

10. See the flags on the top of the building? That was ____ we did this morning.

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

Key:

1-5: CBDDD 6-10: CDADD