高三英语语法重要知识点：定语从句

2019年4月17日英语知识点 492

下面是yingyuzhoubaodaan.com高中频道整理的高三英语语法重要知识点：定语从句，希望能帮助大家做好知识点复习!

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