十二、定语从句

I. 定语从句起了形容词的作用，在句中修饰一个名词或代词。被修饰的词叫做先行词，引导定语从句的词叫关系词，他的作用一是放在先行词与定语从句中间起了连接作用，二是在从句中担当一个成分，并与先行词保持数的一致。

关系词 先行词 从句成分 例 句 备 注 关系代 词 who 人 主语 Do you know the man who is talking with your mother? whom, which和that在从句中做宾语时，常可以省略，但介词提前时后面关系代词不能省略，也不可以用that whom 人 宾语 Mr. Smith is the person with whom I am working

The boy (whom) she loved died in the war.. whose 人或物 定语 I like those books whose topics are about history.

The boy whose father works abroad is my deskmate. that 人或物 主语，宾语 A plane is a machine that can fly.

She is the pop star (that) I want to see very much. which 物 主语，宾语 The book (which) I gave you was worth $10.

The picture which was about the accident was terrible. as 人或物 主语，宾语 He is such a person as is respected by all of us.

This is the same pen as I lost yesterday. as做宾语一般不省略 关系副 词 when 时间 时间状语 I will never forget the day when we met there. 可用on which where 地点 地点状语 This is the house where I was born. 可用in which why 原因 原因状语 I can't imagine the reason why he turned down my offer. 可用for which II. that与which, who, whom的用法区别