高考英语what从句 what从句句型

高考英语。宾语从句和定语从句有什么区别呢，求简单讲解下重点

回答如下：

高考英语what从句 what从句句型

高考英语what从句 what从句句型

1. 宾语从句置于及物动词或介词之后，作动词或介词的宾语。宾语从句的词有连接词(that, if, wher) 、连接代词(what , which, who, whom, whose等)和连接副词how, when, where, why等)。例如：

I know that he is ill.

Can you l me where he lives?

I wonder if / wher he will go.

We don't know whose wallet it is.

Tom is interested in what you said.

注意：that或if从句通常不作介词的宾语(except除外)。例如：

I am not sure about wher (不用if) he will go.

The housI don’t know wher/ if the report is true or not.e is beautiful except that it is a little all.

I know the man who / that is standing there.

The novel which / that you bought is fun.

That is the house where he lived in.

That is the reason why he is late.

注意：定语从句有限制性和非限制性之分，逗号是非限制性定语从句的标志。非限制性定语从句的先行词可以是整个句子,关系代词that不能非限制性定语从句。例如：

He is in hospital, which (不能用that) is true.

宾语从句，

就是宾语的位置，用了一句具有完整结构的话来代替，比如说，我想知道xx，xx可以是一句话：你多大了。

定语从句，就是我想知道一件事，这句话中，用一句话来对一件事这个宾语做修饰或解释，比如：我想知道一件事，这件事它是惊喜的。

两者区别就是，一个用一句话来代替宾语，原句没有出现名词之类的单独宾语。一个就是原局中出现了，宾语，宾语后面跟了一句话去解释补充这个宾语。相同的是，两者都要用开头，。

换个角度解释一下，宾语从句实际上是主谓宾简单句的延长版。eg I don't know anything.四个词。I don't know what he said.六个词。判断宾语从句时把宾语部分用soming,anything能代换，且是疑问副词的从句，那么它就是宾语从句。定语从句也是延长版的句子，你先陈述一个实事，发现说的不清楚，然后再解释一下其中的表语或宾语。eg He is a man who is hard to deal with.他是个不好对付的人。而且定语从句有先行词，who that which etc 结构比较固定。

所谓宾语从句，那就是宾语是个句子，所谓定语从句的定语是个句子。我们通常意义上宾语可不是句子，宾语是个名词，通常意义上定语也24.1 will describe to you _____ I saw when there.不太是句子。它应该是个形容词。比如说宾语是：我喜欢你，这个时候宾语就是一个名词。可是实际上我们会发现世界上并不能够用名词表达所有的事物，我有的时候真的是需要用句子来表达这个事物，表达这个名词。

我是准高三的，求英语从句语法资料！（高悬赏！）

在前面我们已经知道了什么是句子.我们可以这样解释什么叫从句:在一个句子的前面加上一个连接词,这个句子就变成了从句.如果这个从句做了主语,它就是主语从句.其它的以此类推.

高中英语各种复合句课程讲解

（英语尖子生培训课

在句子中起名词作用的句子叫名词从句 (Noun Clauses）

名词从句的功能相当于名词词组, 它在复合句中能担任主语、宾语、表语、同位语等，因此根据它在句中不同的语能，名词从句又可分别称为主语从句、宾语从句、表语从句和同位语从句

【一】主语从句 【二】表语从句 【三】宾语从句

【四】定语从句 【五】同位语从句 【六】状语从句

【一】主语从句：在主句种充当主语成分的从句叫主语从句，

主语从句的连词有：从属连词；连接代词；连接副词

A 从属连词：that，wher。

从属连词；that，wher的主语从句在主语从句中不充当任何成分,只起连接词的作用，通常不可以省略。分句置于句首时，that不可以省略。如果是由It作形式主语，后面that可以省略.

1,有that 的主语从句如下：

1. That the driver could not control his war was obvious.

=It was obvious（that）the driver could not control his car.

=it made us very happy that she was chosen

3. That he is still alive is sheer luck. 他还活着全靠运气。

=It is sheer luck that she is still alive

4. That the whole project is doomed to failure is quite clear

=It is quite clear that the whole project is doomed to failure.

很清楚，整个注定要失败。

5. That you should he to lee is a pity

=It's a pity that you should he to lee.

你非走不可真是件憾事。

6. That he will refuse this piece of a is imsible.

=It is imsible that he will refuse this piece of a

7. That they should like each other is natural

=It is He won't eat you, whor he is. 不管他是谁，他也不能把你吃掉。(whor = no matter who)natural that they should like each other

8. That he will not come to the meeting this ning is true

=It is true that he will not come to the meeting this ning

9. That he will others is a fact

10. That the earth turns around the sun is known to all.

=It is known to all that the earth turns around the sun.

11. That we can win is certain

=It is certain that we can win.

12. That you he made a mistake is a fact.

=It is a fact that you he made a mistake

13. It is ordered that we should lee at once.

14. That you don’t like him is none of my business.

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……

It’s certain that… 肯定…

It is sible that... 很可能……

It is unlikely that... 不可能……

It is necessary important natural... that…

It is sible that she will come back tomorrow.

It is obvious that this measure is effective.

b. It + be +V ed 分词+ that-从句

It is known to all that…从所周知……

It has been decided that… 已决定……

It is said that... 据说……

It is known to all that... 众所周知……

It is reported that... 据……

It is belid that...据信……;人们相信……

It is suggested that + (should）do... 建议……

It must be admitted that…必须承认……

It cannot be denied that… 不可否认……

It must be pointed out that…需指出的是……

It was reported that 20 people were killed in the accident.

It was suggested that we should eat more vegetable and do more exercise

c. It + be +名词+ that-从句

It is a pity/shame that... 遗憾的是……

It is a surprise that…令人惊奇的是…

It is common knowledge that… …是常识

It is common knowledge that…是常识

It is a fact that…事实是……

It was a pity that we lost the match.

It was a fact that he cheated in the exam.

d. It +不及物动词+ that-分句

It appears that…似乎……

It happens that…碰巧……

It occurred to me that…我突然想起……

It occurred to me that I forgot to send this letter

It happened that I came into the off at that time.

It is important(necessary / aisable / desirable / imperative / true / strange / sible ...)that ...需要注意的是,这类主语从句中,谓语动词很多为"(should)＋动词原形",即要用虚拟语气。例如:

几个护士留在这儿是很有必要的。

It is imperative that ryone (should) learn from pract.

每个人都应该从实践中学习。

It is reported (well-known / hoped / thought / expected / said / belid / decided / suggested / ordered ...)that ...例如:

It is said that many people was killed in the earthquake.

据说很多人在这次中丧生了。

it seems(appears / doesn’t matter / makes no difference / ...)that ...

例如:

It makes no difference wher he will attend the meeting or not.

他是否会参加会议都无关紧要。

It doesn’t seem that they are from the same university.

It doesn’t appear that we’ll he a sunny day tomorrow.

if 不能用在主语从句中，而是用wher，如果主语从句放在句首，不能用if，但是如果用it 做形式主语，而把主语从句放在句末时，也可以用if.或把if 改为wher

If Mary really heard him is really doubtful.

正：It was doubtful if Mary really heard him.

正: Wher Mary really heard him is really doubtful.

Wher he left (or not) is unknown

Wher he will come is not clear.

Wher it will rain or not) is not clear

Wher he’ll come here isn’t clear. 他是否会来这里还不清楚。

Wher we will go tomorrow )hasn’t been decided yet

Wher the meeting will be put off has not been decided yet.

Wher the polman will come is not certain.

Wher the 2000 Olympic Games will be held in Beijingis not known yet.

Wher we’ll go camping tomorrow depends on the weather.

wher he likes the job is not clear.

.注意区分it 作形式主语的主语从句与强调句

强调句句型It is/was+被强调部分+that, 去掉It is/was, that，句子仍然成立。

It is natural that they should he different views. 主语从句

It is only lay that he had had a family himself. 强调句

What was it that he wanted? I don’t know what it was that he wanted.

It was in the ho where he stayed that we discussed the serious problem

8.注意it 作形式主语的主语从句和as非限制性定语从句的不同

It is known to all that the earth is round.

B连接代词who ，what ，which, whatr, whichr, whor (Who, whom, which, what可以和r构成合成词，和what一样从句，r起到强调作用。此类主语从句不能用形式主语it，它们在句子中担任成分，不能省略，语序为陈述语序)

What many scientists beli is that the earth is round …

Who will take part in the meeting has not been decided.

Whor breaks the law will be punished.

Which student will win is uncertain.

Whatr was said here must be kept secret.

这里说的话都应当保密。

Whor makes mistakes must correct them.

凡犯了错误的人都必须改正。

What is needed for success) is your hard work.

Who can join in the sport meet) is decided by the teacher

What he needs is that book.

What he needs are some books.

What he needs are some books.

Who he is and where he is from are important.

What he saw are the stars in the sky

What he said at the meeting astonished rybody present

Whor lees the room last ought to turn off the lights.

C连接副词when，where， how， why等。

Why they suddenly disappeared still remains a mystery.

When they will lee is not decided.

Where she is from is unknown.

How we will paint the house has not been decided.

When they will arrive has been told to the teacher

Where we will go tomorrow hasn’t been decided yet

When he will come is not known

When he will come is a puzzle

Where we shall spend the holiday isn’t decided.

Where he comes from is a mystery.

Conclusion:主语从句作 主语时，谓语动词一般用单数形式

主语从句的规律

规律一、主语从句一律用陈述语序，即主语在前，谓语在后。

规律二、连词that 在从句中无实际意义，但不能省略。

规律三、wher 可以主语从句， 放在句首，但if不能

规律四、主语从句中的连词不能重叠使用

规律五、含主语从句的主句谓语动词多用单数第三人称形式。

规律六、what 的主语从句，可根据表语决定主句动词的单复数形式

规律七、主语从句为了避免头重脚轻现象，用 it 做形式主语，把从句放在后面。

高考英语试题中定语从句与强调句陷阱题详解

当用it作形式主语,而将主语从句放在句尾时,主语从句中的否定词常要前移至主句中。例如:

1. The factory was built in a secret place, around _________ high mountains.

He left it to my judgment wher we should continue this project.

A. which was B. it was C. which were D. them were

【分析】是C，around which were high mountains 是一个由“介词+which”引出的非限制性定语从句，而在该从句中，主语是 high mountains，around which 是表语，所以句子谓语应用复数were，而不是用单数 was。请做以下类例题目（均为C）：

(1) Yesterday we visited a modern hospital, around _________ some fruit shops.

A. which is B. it is C. which are D. them are

(2) The murder happened in an old building, beside _________ the city pol station.

A. which are B. it is C. which is D. them are

(3) Next month we’ll move to a new building, next to _________ a n restaurants where we can he Chinese food.

A. which are B. it is C. which is D. them are

2. A man with a bleeding hand hurried in and asked, “Is there a hospital around _________ I can get some medicine for my wounded hand”

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

【陷阱】容易误选 B，认为 around 是介词，选 which 用以代替前面的名词 hospital，在此用作介词 around 的宾语。

【分析】为C。以上语法分析并不算错，但问题是，照此分析，此句的意思即为：有没有这样一个医院，我在它的附近可以买治我的手伤？这样的语境显然有点不合情理，因为人们通常是在医院里面治伤，而不是在医院附近治伤。此题选 C 的理由是：句中的 around 不是介词，而是副词，意为“在附近”；其后的 where 定语从句用以修饰其前的地点名词 hospital，句意为：附近有没有一家医院，我可以去治我的手伤？

3. Did is such a good boy _________ all the teachers like.

A. that B. who C. as D. whom

【陷阱】此题容易误选A，许多同学一看到题干中的such，再联系到选项中的 that，便认为这是考查such … that …句式。况且，这样理解意思也还通顺。

【分析】为C，不是A，因为在such … that … (如此……以至……)结构中，that 的是结果状语从句，并且 that 在从句中不充当句子成分，若在上句填入 such … that …，句末的动词 like 缺宾语。选C的理由如下：as 用作关系代词，用以定语从句，修饰其前的名词 boy，同时 as 在定语从句中用作动词 like 的宾语，句意为“所有老师都喜欢的一位好男孩”。有的同学可能还会问，若选A，能否将其后的 that 视为定语从句的关系代词呢？不能，因为当先行词受到 such 的修饰时，其后的定语从句应用关系代词 as 来，而不用that。比较下面一题，为A，因为 like 后有自己的宾语 him：

Did is such a good boy _________ all the teachers like him.

A. that B. who C. as D. whom

请再做以下试题（选D）：

It was not such a good dinner _________ she had promised us.

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

高考英语。宾语从句和定语从句有什么区别呢，求简单讲解下重点

I will nr forget the day when I joined the Party.

回答如下：

1. 宾语从句置于及物动词或介词之后，作动词或介词的宾语。宾语从句的词有连接词(that, if, wher) 、连接代词(what , which, who, whom, whose等)和连接副词how, when, where, why等)。例如：

I know that he is ill.

Can you l me where he lives?

I wonder if / wher he will go.

We don't know whose wallet it is.

Tom is interested in what you said.

注意：that或if从句通常不作介词的宾语(except除外)。例如：

I am not sure about wher (不用if) he will go.

The house is beautiful except that it is a little all.

I know the man who / that is standing there.

The novel which / that you bought is fun.

That is the house where he lived in.

That is the reason why he is late.

注意：定语从句有限制性和非限制性之分，逗号是非限制性定语从句的标志。非限制A. what B. that C. / D. how性定语从句的先行词可以是整个句子,关系代词that不能非限制性定语从句。例如：

He is in hospital, which (不能用that) is true.

高考英语答题公式

A. how she did it B. that how did she do it.

【解答】什么叫高考的英语答题公式？这个说法不成立的。高考前，还是建议你准备写作、阅读、完型等项目。适合自己的应试技巧强过那些公式答题的方法。努力吧！Fighting！

2. 定语从句置于所修饰的名词或代词之后 ，它在句中用来作定语，修饰前面的名词。被定语从句修饰的名词叫先行词。定语从句的词有关系代词(that , which,who, whom, whose等)和关系副词(when, where, why等)。关系代词指代前面的名词，在定语从句中可以作主语、宾语和定语; 关系副词在定语从句中可以作状语，表示时间、原因、地点等。

高考前，老师都会给的。。

能详细些吗？

高中英语语法名词性从句考点

高中英语语法名词性从句考点

名词性从句包括主语从句、宾语从句、表语从句和同位语从句。因为它是从句，因此具有句子的特点，有主、谓成分；同时又具有名词性特点，所以可以在句子中作主语、宾语、表语或同位语。

一、词 what 与 that 的区别

主、宾、表语从句时，what 要充当主语、宾语或表语等句子成分，that 不作任何成分，而只在语法上起连接作用。例如

_________ we can’t get seems better than _________ we he.

A. What； what B. What； that

C. That； that D. That； what

解析：本句包含一个主语从句和一个宾语从句，且两个从句都缺乏宾语，可见两个词都必须充当从句的宾语，所以为 A 项。

在下面的例句中，that 不充当任何成分，只起语法连接作用（因为句子本身不缺成分）：

That the former Iraq president Saddam was captured has been proved.

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二、词 wher 和 if 的区别

通常，主语从句、表语从句和同位语从句时，连词要用 wher，而不用 if ；习惯上也只能说 wher or not，而不说 if or not .例如：

_________ the meeting will be held in Beijing is not known yet.

A. Whenr B. If

C. Wher D. That

解析：题中的从句位于句首，不难知道这是一个主语从句，根据句意，为 C 项。但如果宾语或主语从句为否定句时，只能用 that，不能用 wher 。如：

That you don’t like him is none of my business.

三、名词性从句的语序

与别的从句一样，名词性从句必须用自然语序，即使在疑问句中，从句也不倒装（而在主句上倒装）。例如：

No one can be sure _________ in a million years.

A. what man will look like

B. what will man look like

C. man will look like what

D. what look will man like

解析：由于从句不能倒25. From _____ I should say he is a good worker.装，所以只能选 A 项。同时还须注意，从句的词必须始终置于句首。

四、 who / whor，what / whatr 等的区别

一般说来，what / who 等含特指意义，而 whatr，whor 等含泛指意义。例如：

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It is generally considered unwise to give a child _________ he or she wants.

A. howr B. whatr

C. whichr D. whenr

解析：为 B 项。 Whatr 一个宾语从句，并且作 wants 的宾语。这里的 whatr 不能改成 what，因为题意想表达的显然是无论孩子要什么，就给他 / 她什么是不明智的，具有泛指的概念。同时要注意，这里 whatr 也不能改用 no matter what，因为后者只能状语从句。

五、 where，when，why 等连接副词的名词性从句

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

— Is that _________ you had a few days off？

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

解析：为 A 项，why 的从句作表语，同时 why 在从句中作原因状语。又如：

— Do yoemember _________ he came？

— Yes. I do，he came by car.

A. how B. when C. that D. if

解析：为 A 项。从答语 he came by car 可知，这里问的是 he 来的方式，所以用 how 。

六、介词 + who（m） 的宾语从句与介词 +who（m） 的宾语从句的区别

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介词后面的词用主格还是宾语，决定于它在宾语从句中作主语还是宾语。例如：

It was a matter of _________ would take the ition.

A. who B. whor

C. whom D. whomev2. That she was chosen made us very happy.er

解析：为 A 项。由于这里的词在从句中作主语，所以要用主格 who （作宾语时自然要用 whom ）。比较下例：

Our country has thousands of excellent scientists，most of whom he received higher education at home.

这是一个介词 + 关系代词的定语从句。定语从句的是 most of + 关系代词，而不只是这个关系代词，同时这个词又作介词 of 的宾语，所以要用宾格 whom .

七、名词性从句中有插入成分时

此时应注意两点：一是从句仍然不倒装，而在插入成分上倒装；二是要注意主语的主格和宾格的选择。例如：

_________ you he seen both fighters，_________ will win？

A. Since； do you think who

B. As； who you think

C. When； whor

D. Since； who do you think

解析：为 D 项。其中 do you think 是插入成分，其余部分是宾语从句，作 think 的宾语。由于词在从句中作主语，所以要用主格 who .

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八、词 that 的省略

宾语从句时，that 通常可以省略，但主语、表语和同位语从句时，that 不能省略。例如：

China’s success in manned-space-craft trel shows _________ out country has become one of the greatest powers in space research.

A. what B. which

C. 不填 D. it that

解析：该句中的从句作 shows 的宾语，是宾语从句，又因为从句中不缺主语、宾语，所以只能用 that ；又因宾语从句时 that 可以省略，所以是 C 项。

九、同位语从句词 where，when 的用法特点

说明先行词内容的同位语从句的词 where，when 与被说明的名词在概念上不一致。但定语从句的词却必须保持一致。试比较：

① Then arose the question _________ we were to get so much money.

② This is the house _________ the great man Mao Zedong was born 110 years ago.

A. where

B. that

C. about which

D. in which

解析：①的为 A 项；②的为 A 项或 D 项。先行词与 where，when 概念一致时，是定语从句，此时，关系副词 where 或 when 可以用介词 +which 形式代替。①中的 question 与 where 不表同一概念，可见是同位语从句，where 不能改用介词 +which 的形式。②中的 house 与 where 同表地点，所以选 A 项或 D 项都可以。

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黑龙江 荆棘

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;

高一英语补充的（老师原来教高三）英语中： what is konw； it is konw； as

A. if B. that C. when that D. that where

1 what is konwn是 特殊疑问句 或名词性从句

作为名词性从句 what 是连接代词 作从句中的主语 该从句 可以作主语宾语表语

如 what is konwn is that the earth goes around the sun作主语

this is what is know什么叫名词性从句？n 作表语

2 it is konwn；it 是人称代词作主语 is konwn是谓语

该句型 中 it 经常 代替主语从句作形式主语 后面 的主语从句作语

如 it is konwn that the earth goes around the sun .

3 as is known to us all；这是非限制性定语从句 as 是关系代词 代替后面的主句 并且在从句中作主语

如 as is known to us all， the earth goes around the sun .

what is known做主语，用法是What is known is that.....

It is known是固定句型，用法是It is known that...

As is know to us all的意思是，正如我们所知道的，一般与后面的主句有逗号隔开。

求满意。。。

什么是知情（konw）?知情就是大家都知道（know）

高考英语从句的选择题，怎么答啊！

21. Peter insisted _____ he pay the bill.

1.选B，同位It is necessary that sral nurses (should) stay.语从句。

2.选B，定语从句。

1)B.that 同位语从句

2）B.where 从句还原为our student benefited a lot from the activity

没有上下文怎么选啊

高三英语语法知识点总结

where，when，why 等连接副词也可以名词性从句，使用的关键是：这个词必须符合句子的逻辑要求。例如：

从句是高三英语语法学习的重点，也是英语写作中不可缺少的一个点。下面是我给大家整理的高三英语语法，供大家参阅!

高三英语语法：表语从句

来充作宾语的句子叫做宾语从句。如：

He asked what you were doing last night. 他问你昨天夜晚在干什么。

Can you explain why he didn’t come to the party last Sunday? 你能解释上周星期日他为什么没有来参加聚会吗?

在宾语从句中须注意：

1. that 在口语中常被省略，但在正式的文体中，不能省;并且它一般不能介词的宾语从句，但可except, but, in 等少数介词的宾语从句。如：

I didn’t know (that) he was Li Lei. 我不知道他就是李蕾。

I will do anything I can to you except that I’m ill. 只要我身体舒服，我愿做任何事情来帮助你。

2. 宾语从句之后带有补足语成分时，一般须用it作形式宾语，把宾语从句放到句末，此时的that不能省。如：

The boy has made it clear that they can’t play with his toys. 那个男孩已清楚的表明他们不能玩弄他的玩具。

3. 动词aise, ask, demand, desire, insist(坚决主张), order, proe, request, suggest(建议)等代的宾语从句须用虚拟语气，即：(should) do的形式。

He asked that we (should) get there before nine o’clock. 他要求我们在九点钟之前赶到那儿。

The teacher aised us that we (A. that can I repair the radio B. wher I can repair the radioshould) not waste our time. 老师劝告我们不要浪费时间了。

4. 宾语从句的时态与主句的时态须呼应。

1)当主句谓语动词的时态是现在时或将来时，从句的谓语动词可用任何所需要的时态表示。如：

He always says that he is our good friend. 他总是说他是我们的。

When the teacher knows what we he done, he will say that we he done a good deed. 当老师知道我们所干的事情时，他会说我们做了一件好事。

2)当主句谓语动词的时态为过去时，从句的谓语动词须用响应的过去时。如：

He didn’t l us he came from Shanghai. 他没有告诉我们他来自上海。

He said he had read the book. 他说他读过这本书。

3)但当从句的内容是客观真理或客观事实，而不受时间的限制时，即使主句谓语动词为过去时，从句仍用一般现在时。如

Chairman Mao said that all the imperialists are tigers. 说一切者都是纸老虎。

When we were children, we were told that China is in the east of the world. 我们还是小孩子的时候，人们就告诉我们说在世界的东方。

高三英语语法：表语从句

用来作主语的句子叫做主语从句。如：

(1)When he was born is unknown. 他生于何时还不知道。

(2)What he did last night is being investigated. 他昨天晚上干了些什么正在调查之中。

在主语从句中须注意：

1. 主语从句一般用it作形式主语，放在句首，而将主语从句放到句末。如：

(1)It is sible that he has stolen the car. 很可能他偷了小车。

(2)Isn’t it strange that he should not he passed the test? 他测试没有通过，难道不奇怪吗?

2. if主语从句时，只能用it作形式主语，放在句首，而将if的主语从句放到句末。如：

It is uncertain if he will lee for Beijing tomorrow. 明天他是否去还不敢肯定。

3. that主语从句放在句首时，that不可省，但在句末口语中可省。如：

That he was ill yesterday is known now. 大家都已知道他昨天生了病。

4. 连接代词主语从句只能放在句首。如;

(1)Who has broken the glass is unknown. 谁打破了玻璃现在还不知道。

(2)What he wants is all here. 他所要的东西都在这里。

5. 主语从句中主句的谓语动词一般用第三人称单数形式，但what主语从句的主句谓语动词的形式须根据句子的意思来判断。如

(1)How he worked it out is still a secret. 他是如何把它做出来的还是一个秘密

(2)What they makes in this factory are TV sets. 他们在工厂里所做的东西就是电视机。

高三英语语法：名词性从句

一、概说

名词性从句，即指性质相当于名词的从句，它包括主语从句、宾语从句、表语从句和同位语从句。从高考的考查的实际情况来看，名词性从句考得最多的是宾语从句，其次是主语从句，再次是表语从句，而同位语从句则很少考查。

二、名词性从句的一般词

1. 连接词 that 名词性从句时，只起连接作用，没有任何意思，也不充当句子成分，在宾语从句中可省略，但其他名词性从句时通常不省略。如：

I hope (that) you enjoy your holiday. 希望你期过得好。

That he likes you is very obvious. 很显然他喜欢你。

2. 连接词 wher 名词性从句也不充当句子成分，但有自己的意思，表示“是否”;宾语从句时，可换成 if，但其他名词性从句时不能换成 if。如(from )：

He asked wher [if] I would show him the way. 他问我是否可以给他带路。

Wher it will do us harm remains to be seen. 是否对我们有害还要看一看。(主语从句，不能用 if 代替 wher)

3. 连接代词 who(m), whose, which, what 等名词性从句时，均有各自的意义，在从句中作主语、宾语、定语等。如：

That’s why she wanted to lee. 这就是她想离开的原因。

When we arrive doesn't matter. 什么时候到没有关系。

Tell me which one you like best. 告诉我你最喜欢哪一个。

4. 连接副词 when, where, why, how 等名词性从句，也各自有自己的意义，在从句中作状语。如：

The question is how we should carry out the plan. 问题是怎样执行这个。

When she’ll be back depends much on the weather. 她什么时候回来在很大程度上要看天气。

三、名词性从句的重要词

1. what 用于名词性从句是一个十分重要的词，它可主语从句、宾语从句和表语从句，但不用于同位语从句。它的名词性从句有两个意思是：一是表示“什么”，带有疑问意味;二是表示“…所…的”，相当于一个先行词后接一个关系代词。如：

I don’t know what you want. 我不知道你想要什么。

I don’t know what you want is this. 我不知道你所想要的是这个。

2. what 名词性从句时可用作限定词，其后修饰名词。如：

I ge him what books I had. 我把我所有的书都给他了。

He ge me what money he had about him. 他把身边带有的钱全给了我。

注：what 后的名词可以是复数名词或不可数名词，但通常不能是单数可数名词，并且后接不可数名词时，有时可有little修饰，两者的区别是：what+不可数名词=所有的都，what little+不可数名词=虽少但全部。如：

What friends she has are out of the country. 她有的那些朋友全在国外。

We ge him what (little) we could. 我们给了他我们力所能及的帮助。

3. whor, whatr, whichr 等也可名词性从句，其意分别为“所…的一切事或东西”、“任何…的人”、““…的任可人或物”等。如：

Whor wants the book may he it. 任何人要这书都可拿去。

I’ll do whatr I can to him. 我们将尽我们所能来挽救他。

Buy whichr is cheapest. 买的。

注意以下受汉语意思影响而弄错的句子：

任何人来都欢迎(from )。

误：Who comes will be welcome. / Anyone comes will be welcome.

正：Whor comes will be welcome. / Anyone who comes will be welcome.

另外，它们也可让步状语从句，其意为“无论…”、“不管…”，其意相当于 no matter who [what, which]。如：

注：whor 名词性从句时既用作主格也用作宾语;作宾语时不宜用 whomr，因为在现代英语中 whomr 这个已几乎废弃不用。

4. why 与 because 的用法区别。两者均可表语从句，但前者强调结果，后者强调的原因。如：

I had a cold. That’s why I didn't come. 我感冒了，因此我没来。

I didn’t come. That’s because I had a cold. 我没有来，那是因为我感冒了。

五、名词性从句的语序

名词性从句的词序与陈述句语序相同，尤其注意那些由连接代词who(m), whose, which, what 和连接副词 when, where, why 等的名词性从句，不要受它们在特殊疑问句中用法的影响而误用疑问句词序。如：

Why was she crying? 她为什么在哭?

I don’t know why he was crying. 我不知道她为什么哭。

六、名词性从句的时态问题

1. 当主句的谓语动词是过去式时，宾语从句若不是一个客观事实或真理，其谓语动词也必须用某种过去时态。如：

She said that she didn't want to know. 她说她不想知道。

I asked her wher she would agree. 我问她是否会同意

2. when, if 这两个词既可名词性从句，也可状语从句。当它们名词性从句且表示将来意义时，要直接使用将来时态;但当它们状语从句且表示将来意义时，则必须用一般现在时表示将来意义。如：

I don’t know when he will come, but when he comes, I’ll call you. 我不知道他什么时候，但当他来的时候，我会打电话给你。

句中个when 的是宾语从句，故用将来时态表示将来意义;第二个when 的是时间状语从句，故用一般现在时表示将来意义。

高三英语选择题，希望详细讲解

As is known to all. the earth is round.

They arrived at___used to be the school____Mr.Li once taught for five years.

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

I didn’t know that he was wounded in the accident. 我原来不知道他在那中受了伤。为什么选D不选A希望详细解答?

答：arrived at what used to be the school, what used to be the school 是由what的名词性从句，是一个纯名词性的从句，what相当于一个名词+that-（定语从句）， 连接代词what 在从句中作used to be的主语。而连接副词where尽管也可以纯名词性从句，如：This is where Luxun was born. where=the place where(-定语从句），但where是个副词，不能作used to be的主语。所以是D，不是A。后一空中的where的是限制性定语从句，先行词是the school. 定语从句的主语是Mr. Li

因为这个从句___used to be the school，缺少主语，而能做主语的事what吗，而不是where。

what 的是宾语从句，做at的宾语。

后一个是where的定语从句，修饰前面的school。

恩，这样来解释你的问题吧。

1.They arrived at (a place) (where) used to be the school (where) Mr.Li once taught for 5 years.

2.They arrived at (what) used to be the school (where) Mr.Li once taught for 5 years.

首先，我们来分析这个句子结构，庖丁解牛：O

主语是They,谓语是arrived at，后面则是全句的宾语部分。

宾语部分虽然有些复杂，但还比较简单：

前一个半句是需要描述到达了一个什么样的地方。

后一个半句使用where来一个定语从句，用来修饰/限定这是一所什么样的学校，都没有疑问。对吧？：）

你的疑问是：为什么用where而不是what?

我们知道，what used to be XXX,可以视为一个名词，从而在全句中作为宾语；

而where used to be XXX 却只能作为一个状语从句，用来修饰一个地点，因此，它前面需要有一个名词,比如 a place，但可惜的是没有，因此不能用。

另外，从语感上，如果一个句子里同时使用两个where,很容易使听者混淆，犯晕，不知道究竟指代什么。

where不能做主语，因此不能放在used to be the school 前面。

而where 非要用在arrive at的话，可以为they arrived at where there is a school,

我怎么觉得应该选B啊 我也迷糊了 。。。

arrived at 后面显然缺少宾语,所以后面应该跟的是宾语从句,而这个宾语从句当中又包含了一个定语从句,先行词是school,而Mr.Li once taught for five years这个从句里缺少的是地点状语,所以应该选用关系副词where

把定语从句省略后,原宾语从句是used to be the school,显然缺少主语,于是就选择用what

如果选A就at后面的从句缺主语，D中的what可做主语