名词性从句特殊用法(名词性从句用法及其讲解)

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。

名词从句按照引导词分类：

1)、that引导的名词从句。

2)、whether(if)引导的名词从句。

3)、疑问词引导的名词从句。

that和whether引导的名词从句，引导词that和whether在句子中不做成分。也就是说that和whether后面是个完整的句构。

that后面的句子是陈述句演变而来。

whether后面的句子是由疑问句演变而来，wheaher表示是否的意思。

疑问副词(when where how)在引导的名词从句做状语所以后面是个完整的句子。

疑问代词(what who whom)在引导的名词从句中要做成分，即做主语，宾语，表语等，所以后面的句构不完整。

理解：名词从句具有名词的特性，我们把它当做一个名词来对待，比如动名词，不定式短语这种名词短语都可以当做名词来对待。

1)、名词性从句主语

That honesty is the best policy is a proverb(which) we should always keep in mind.

“诚实为上策”是一句我们应时刻谨记在心的箴言。

2. Where he lives is still in doubt.

他住在哪儿仍然不确定。

3. Whether he can do it remains to be seen.

他能否胜任仍然有待观察。

由于that weather where引导的名词从句主语显得有些长。所以我们可用形式主语it来替代，置于句首，而名词从句至于句尾。

可改为：

1. It is a proverb we should always keep in mind that honesty is the best policy.

2. It is still in doubt where he lives.

3. It remains to be seen whether he can do it.

2)、名词性从句作宾语

名词从句可以做及物动词的宾语也可以做介词的宾语。

一、做及物动词的宾语：

1. I know that he will come tomorrow.

我知道他明天就回来了。

2.I wonder wheher he can marry me.

我想知道他能否娶我。

3. I don't know what he said to you yesterday.

我不知道他昨天对你说了些什么。

二、做介词的宾语：

whether和疑问词所引导的名词从句可以作介词的宾语。而that引导的名词从句不能做介词的宾语。

I'm worried about whether he can marry me.

我非常担心他能否娶我。

I'm curious about what he said to you yesterday.

我很好奇他昨天对你说了些什么。

I'm sure of that he will marry you.(x)

I am sure of that the team has won the game. (x)

三、that从句做介词宾语的处理方法

如果遇到介词，一定要接that从句做宾语时，可以使用：

1. 介词＋the fact＋that引导的名词从句

I am sure of the fact that the team has won the game.

我确定这一队赢了这场比赛。

I am worried about the fact that he doesn't study.

我担心他不念书。

2. 名词从句变成名词所有格形式，也就是名词短语。

I am worried about that he plays around all day.

(X)

I am worried about his playing around all day.

(√)

我为他整天游手好闲而担心。

3. that从句若有助动词do、does、did、will或 would时都去掉，变成所有格形式。

I am worried about that he doesn't study. (X)

改成：

I am worried about his not studying.

I am sure of that the team will win the game. (X)

改成：

I am sure of the team's winning the game.

我确信这一队会赢得这场比赛。

4. may变成be likely to can变成be able to

再将be动词变成动名词 being

I am happy about that he may come.(X)

I am happy about his being likely to come. (√)

我很高兴他可能会来。

I am sure of that he can do it. (X)

I am sure of his being able to do it.(√)

我确定他能做这件事。

5. be＋形容词＋that引导的名词从句

也就是去掉介词，将that从句放在形容词后面，作其宾语。

I am worried about that he plays around all day.

改成：

I am worried that he plays around all day.

6. in that 等于 because 因为

He likes me in that I can help him in study.

except that只可惜；除了…

He is nice except that sometimes he can smoke in public place.