高中英语语法精讲精练---名词性从句

高中英语语法精讲精练----名词性从句

一、名词性从句的语法功能与分类

在复合句中起名词作用的从句叫名词性从句(Noun Clauses)。名词性从句的功能相当于

名词或名词词组, 它在复合句中能担任主语、宾语、表语、同位语、介词宾语等，因此根据

它在句中不同的语法功能，名词性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。

主语从句：如果一个句子在复合句中充当一个主语，那么这个句子就是主语从句。

1) What he is going to do is not clear.

2) Who will be our monitor hasn’t been decided yet.

宾语从句：如果一个句子在复合句中用作宾语，那么这个句子就叫做宾语从句。

1) Jack said that he had something important to do.

2) I want to know if/whether there is a train to Beijing.

表语从句：如果一个句子在复合句中用作表语，那么这个句子就叫做表语从句。

The trouble is that I have lost his address.

同位语从句：用作同位语的从句叫做同位语从句。

一般情况下同位语从句跟在某些名词，如news，idea，fact，word（消息），question，

thought，doubt，order，promise，hope，message，information等的后面，用以说

明该名词所表达的具体内容。关联词多用从属连词that。

1) They were all very much worried over the fact that you were sick.

2) Where did you get the idea that I could not come?

3) Early in the day came the news that Germany had declared war on Russia.

【注意】that引导的同位语从句与定语从句的区别

☆定语从句是修饰限制它前面的名词，因此，它是属于形容词性从句。而同位语从句属于名词性从句，它是用来说明它前面的名词内容的，或者说是解释前面名词

的内容。

换而言之：

同位语从句和先行词是同等的关系；而定语从句是用来修饰先行词，是从属的关

系。