定语从句常见知识点

定语从句基本知识

关系副词when, where, why引导定语从句

where 表示地点，只能跟在表地点或场合的名词后。

where不在从句中做主语或宾语。

1 What is the name of the town where we stayed last night?

2 Think of a place where we can go for dinner.

3 Please leave the book at the place where it was.

4 Please leave the book where it was

when表示时间，只能跟在表时间的名词后。

1 Tell me the time when the train leaves.

2 July, when (=in which) we can go home for a rest, is coming soon.

3 I will never forget the days that/which I spent with your family.

why表示原因，通常跟在reason后引导定语从句。

1 I don’t know the reason why he left here.

2 This is the reason why (= for which) he cried.

3 The teacher was surprised at the reason (that/which) he explained for being

late.

介词+ 关系代词

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when表示时间，只能跟在表时间的名词后。 why表示原因，通常跟在reason后引导定语从句。

当先行词是way,reason,time 时，定语从句如需关系副词，可由that来引导，且that可省略。 当先行词是position,situation,stage,point等表抽象地点的词时，定语从句如需关系副词，可由where来引导.

We have reached a stage where we have almost no rights at all.

We were put into a position where we had to fight the government.

非限制性定语从句

注意

a，that, why不能在非限制性定语从句中使用。

b，As引导非限制性定语从句常位于句首, 指代整个的主句。常译为“正如”。

As引导的非限制性定语从句, 常位于句首, which不可以

限制性定语从句和非限制性定语从句

A, , 主句的意思就不完整或

失去意义。这种从句和主句的关系十分密切，写时不用逗号分开。限制性定语从句中作宾语的关系代词常可省略。

B, 非限制性定语从句和主句关系不十分密切,, 主

句的意思仍然清楚。这种从句和主句之间往往用逗号分开, 一般不用that引导。非限制性定语从句中, 关系词不可省略。如：

C, 大多数限制性和非限制性定语从句的先行词往往为某一个词或短语, 定语从句的先行词也可为整个主句, 此时非限制性定语从句常由which引导。

A middle-aged woman killed her husband, which frightened me very much.

A five-year-old boy can speak two foreign languages, which surprises all the people present.

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