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who, which引导的定语从句

who, which引导的定语从句
在复合句中,修饰某一名词或代词的从句叫定语从句。

它的作用相当于一个形容词。

定语从句通常位于它所修饰的名词或代词之后,这一名词或代词叫先行词,引导定语从句的关联词为关系代词(副词)。

这里主要介绍关系代词who与which的用法。

关系代词who(whom)和which均可引导定语从句,who用来指人,而which指物,在从句中充当主语或宾语。

请看例句:
We shall never forget Mr Li who taught us English in the middle school. 我们永远不会忘记中学时教我们英语的李老师。

(who在从句中作主语) The man who(m) you saw last week has left the town. 上周你看见的那个人已离开这个城镇了。

(whom也可用who, 在从句中作saw的宾语)【温馨提示】关系代词在从句中作宾语时,常可省略。

如:
He told a story which moved us deeply. 他讲了一个使我们深受感动的故事。

(which在从句中作主语)
This is a reason which we must not forget. 这是
(which在从句中作宾语)我们不能忘记的一个原因。

需要指出的是关系代词which和that都可指物,一般情况下可以互换。

如:
The house which / that you lived in is a very old building. 你住的那个房子是座古老的建筑。

但在下列情况中,通常用which, 不用that。

当先行词有指示代词修饰时。

如:
The lady did not want that one which smelt terrible. 那位夫人不要气味难闻的那个。

当关系代词前有介词时。

如:
The room in which my family live used to be a garage.我家住的房间以前是个车库。

当先行词本身为that时。

如:
That which you told him about is what we want to know. 你告诉他的正是我们想知道的。

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