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名词性从句全面透彻解析

名词性从句全面透彻解析
名词性从句全面透彻解析

一.名词性从句考查的焦点主要有以下六方面

1. 考查名词性从句的语序问题

2. 考查引导词that与what的区别

3. 考查it在名词性从句中作形式主语和形式宾语的用法

4. 考查whether与if的区别

5. 考查名词性从句中的疑问词+ever引导的名词性从句与no matter+疑问词引导的状语从句的区别

6. 考查名词性从句的虚拟语气问题

二.名词性从句的含义及连接词

名词性从句的含义:

在复合句中起名词作用的从句叫做名词性从句。它包括主语从句、宾语从句、表语从句和同位语从句。

引导名词性从句的连接词可分为四类:

1. that(无含义,不充当成分)

2. whether, if(有“是否”的含义,但不充当成分)

3. 连接代词:what, whatever, who, whoever, whom, whomever,whose, which,whichever.(在从句中做主语、宾语、表语和定语)

连接副词:when, whenever,where,wherever, how, however,why(在从句中做状语)

4. as if,as though,because(不充当成分,在名词性从句中只引导表语从句)

三. 四类名词性从句语法要点

1.主语从句

在整个句子中用作主语的从句叫主语从句。

What he wants to tell us is not clear.

他要跟我们说什么,还不清楚。

It is known to us how he became a writer.

我们都知道他是如何成为一名作家的。

Where the English evening will be held has not yet been announced.

英语晚会将在哪里举行,还没有宣布。

it作形式主语:

有时为避免句子头重脚轻,常用形式主语it代替主语从句作形式主语放于句首,而把主语从句置于句末。

It is clear that he is innocent in the accident.

很明显,他在这场事故中是无辜的。

2. 宾语从句

在整个句子中用作宾语的从句叫宾语从句。

He has told me that he will go to Shanghai tomorrow.

他已经告诉我他明天要去上海。

We must never think (that) we are good in everything while others are good in nothing.

我们决不能认为自己什么都好,别人什么都不好。

it作形式宾语:

在“主语+谓语+宾语+宾补”的句型中,如果宾语是从句的形式,则必须用it 做形式宾语,把真正的宾语即宾语从句置于句末。

We found it impossible that the so much work will be finidhed in one day.

我们发现一天之内完成这项工作不可能。

3. 表语从句

在整个句子中用作表语的从句叫表语从句。

The fact is that we have lost the game.

事实是我们已经输了这场比赛。

That is why he didn’t come to the meeting.

那就是他为什么不到会的原因。

It looks as if it is going to rain.

看上去天要下雨了。

This is because he has been working hard these days.

这是因为这些天他一直工作很努力。

注意:because,as if 和as though在名词性从句中只能引导表语从句。

4. 同位语从句

在整个句子中用作同位语的从句叫同位语从句。

同位语的含义:在句子中,如果有两个名词,并且后一个名词是对前一个名词的解释说明,它们两个指的是同一个人或同一个物,那么,后面的名词就叫前面名词的同位语。

例如:This is my friend, Tom.(Tom是my friend 的同位语。)

可用于同位语从句的名词有advice、demand、doubt、fact、hope、idea、information、message、news、order、problem、promise、question、request、suggestion、truth、wish、word等抽象名词。

The news that we won the game is exciting.

我们赢得这场比赛的消息令人激动。

I have no idea when he will come back home.

我不知道他什么时候回来。

The thought came to him that Mary had probably fallen ill. 他想到可能玛丽生病了。

同位语从句和定语从句的区别:

that作为关系代词,可以引导定语从句,充当句子成分,在从句中作宾语时可以省略;that引导同位语从句时,起连词的作用,没有实际意义,不充当句子成分,一般不能省略。

试比较下面两个例句:

I had no idea that you were here.

我不知道你在这里。

(that无含义,that you were here 指的就是idea,所以是同位语从句,不能省略that)

Have you got the idea(that)this book gives you?

这本书给了你想法吗?

(that指的是the idea,that引导定语从句,作宾语,可以省略)

四. 连接词that在名词性从句中可以省略的三种情况

1.it 做形式主语,that引导主语从句时

It is said (that) he has been studying abroad.

据说他一直在国外学习。

2.动词宾语从句中

I think(that) you have much to improve in English.

我认为你的英语需要提高的有很多。

3.形容词宾语从句中

I am afraid (that) I will be late.

恐怕我要迟到了。

名词性从句专项练习20题

1. His success was because of ________ he had been working hard.

A. that

B. the fact which

C. the fact that

D. the fact

2. “Is Mary from New York City”“I don't know _______.”

A. from what city does she come from

B. from what city she come

C. what city does she come from

D. what city she comes from

3. ________ makes mistakes must correct them.

A. What

B. That

C. Whoever

D. Whatever

4. The reason why I didn't go to Shanghai was ________ a new job.

A. because I got

B. because of getting

C. I got

D. that I got

5. It worried her a bit ____ her hair was turning grey.

A. while

B. that

C. if

D. for

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我们如何理解事情与我们所感受到的有很大关系。 Where Li Bai,a great Chinese poet,was born is known to the public,but some won't accept it. 李白,中国伟大的诗人,出生的地方人人皆知,但是有些人对此并不接受。 The limits of a person's intelligence,generally speaking,are fixed at birth,but whether he reaches these limits will depend on his environment. 通常来说,一个人智力上的极限从一出生就确定了,但他是否能够达到极限取决于他所处的环境。 2.形式主语 it作形式主语的常见句型: (1)It+be+形容词(necessary/likely/important/certain等)+that从句 (2)It+be+名词(短语)(a pity/a shame/no wonder等)+that从句 (3)It+be+过去分词(said/told/reported等)+that从句 (4)It+不及物动词(seem,appear,happen,matter等)+that从句 It is uncertain what side effect the medicine will bring about,although about two thousand patients have taken it. 尽管大约两千名患者已经服用了这种药,但是它会带来什么样的副作用还不清楚。 It doesn't matter whether you pay by cash or credit card in this store. 在这个商店里你用现金支付还是信用卡支付都没有关系。

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(2)形式主语it 代替主语从句位于句首时,常见的几种情况: (1)It + adj +that 从句(大多数情况下that从句后用should+动词原形) Adj: necessary right clear unlikely strange obvious natural important Eg: It is necessary to learn English well. (2) It +系动词+名词+that 从句 Non: a pity an honor good news a wonder a fact no wonder no surpeise Eg: It is a fact that you are a good boy. (3) It +be + 过去分词+that从句 过去分词:said / heard/ reported/ told/ decided/suggested/thought/considered/ hoped/ announced Eg: It is announced that the plan has been canceled. 注意:It + be+ suggested/ advised/ ordered/ requested/ insisted/ demand+ that从句,that从句要用should +动词原形,should可以省略。 Eg: It is suggested that you (should ) spend more time in studying English .d 但当suggest表示“表明”时,不可以用虚拟语气 Eg: It suggests that you are an honest boy. Insist 表示“坚持某种说法(事情已经发生过了)”,不用虚拟语气。 表示“坚持要做(事情没有发生)”,要用虚拟语气。 Eg: she insisted that I have never done such thing . She insisted that I study abroad. (4) It +动词(+宾语或状语)+that 从句 动词如:appear(显得)/ happen(碰巧)/ matter(重要)/ occur(出现)/ turn out(结果是) Eg: It happened to me that I was away when he came.

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