如何区分名词性从句?不会区分这些东西.

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如何区分名词性从句?不会区分这些东西.如何区分名词性从句?不会区分这些东西.如何区分名词性从句?不会区分这些东西.名词性从句是在句子中起名词作用的主谓结构,它可以在主从复合句中作主语、宾语、表语、介词

如何区分名词性从句?不会区分这些东西.
如何区分名词性从句?
不会区分这些东西.

如何区分名词性从句?不会区分这些东西.
名词性从句是在句子中起名词作用的主谓结构,它可以在主从复合句中作主语、宾语、
表语、介词的宾语以及同位语.
1.主语从句
主语从句可以由连词that,wh-疑问词或名词性关系词引导.
⑴由连词that引导:从句可以位于句首,但常常用形式主语it替代,从句本身则放在
主句后面,如:
That he will come to the party is certain.
It happened that the harvest was bad that year.
Is it true that she has never been there?
通常在口语或非正式文体中,that常可省略,但必须是在用先行词it的情况下,如:
It’s a pity (that) you are leaving.
⑵由wh-疑问词引导:从句既可以前置,又可以借助于先行词it后置.如:
Who cleaned the meeting room is unknown.
It’s still a question when we shall have our sports meet.
It is uncertain whether he will come.
注意:在疑问句中,wh-疑问词所引导的从句不能位于句首,如:
Is it known where she went?
⑶主语从句也可由名词性关系词引导,这类从句只能位于句首,如:
Where she went was Los Angeles.
What will be,will be.
Whomever you invite will be welcome.
2.宾语从句
⑴宾语从句可用that引导,这时that仅起连接作用,不充当从句中的成分.如果连接词
要在从句中起语法作用,就要使用连接词what等来引导从句.
I believe that he is honest.
We fully understood what he meant.
⑵有些形容词的后面也可跟宾语从句.这类形容词有:certain,afraid,aware,sorry,sure,
worried等.如:
I’m afraid that you are wrong on this point.
I am aware that you have been exceptionally kind to me.
⑶宾语从句也可以用how,when,who,which,where,why等词引出,此时即使主句是一
个疑问句,宾语从句也必须保持陈述句的语序.如:
Go and ask why he was late yesterday.
Can you tell me where the hospital is?
⑷跟在介词后面的宾语从句一般不能由that来引出,只限于except,in,but,besides,save
等五个介词的宾语从句,其它介词后面不能跟由that引出的宾语从句,而只能跟由what,how,
whether等引出的宾语从句.
You are wrong in that you took effect for cause.
I would go with you,except that I have to work that day.
They were arguing about what was to be done.
I’m thinking of whom I should ask for help.
3.表语从句
表语从句通常由that引出,当然how,why,where,when等也可以引出表语从句.常见的
表语从句有下面两种句型:
⑴"The reason…that":表示“原因是……”.如:
The reason for leaving was that it was too cold.
⑵"It (This,That) is because…":表示“这是因为……”,“这是由于……缘故”.如:
This is because iron contains more carbon than steel.
4.同位语从句
同位语从句表示与之同位的名词中心词的实际内容.
⑴同位语从句起进一步解释说明先行词的作用,通常由that引导.同位语从句的先行词
通常是一些抽象名词,如:appeal,idea,truth,fact,theory,belief,plan,hope,proposal,rumor,
suggestion等.
There is truth in the old saying that necessity is the mother of invention.
⑵由wh-疑问词引导,如:
I have no idea when he will come.
It is difficult to answer your question why I did it.
⑶由名词性关系词引导,如:
Fame and fortune—what others sought after with zest—was all rubbish to him.
⑷注意同位语和that引导的定语从句的区别:that在同位语从句中只起引导从句的作用,
本身并无意义,也不在句子中担当任何成分;而定语从句的that既引导从句又充当句子成分.
The news that he intended to come gave us much pleasure.(同位语从句,that不作句子成
分.)
He is the best speaker that addressed the meeting.(定语从句,that在从句中作宾语,指代
的先行词是主句中的主语.)