2．如果which在从句中作“不及物动词+介词”的介词的宾语，注意介词不要丢掉，而且介词常放在关系代词which的前边，但有的则放在它原来的位置。

1．关系代词做从句的主语时，从句谓语动词的人称和数要与先行词保持一致。

4. that既可代表事物也可代表人。

关系代词在从句中作主语时不能省略，而当关系代词在从句中作宾语时，常常省略。

特别提示：

2. whom指人，在定语从句中充当宾语，常可省略。

(1) Mr. Liu is the person (whom) you talked about on the bus.

(2) Mr. Ling is just the man whom I want to see.

注意：关系代词whom在口语和非正式语体中常用who代替，可省略。

(3) The man who/whom you met just now is my friend.

•　　　 3. which指物在定语从句中做宾语时可省略

•　　　 (1) Football is a game which is liked by most boys.

•　　　 (2) This is the pen (which) he bought yesterday.

1. who指人在从句中做主语

(1)　The boys who are playing football are from Class One.

(2)　Yesterday I helped an old man who had lost his way.

限定性定语从句

2．你能划出下面句子中的定语从句吗？

As a Global Environmental Ambassador(大使) , Gong Li urges the public to give up habits that are harmful to the environment .

1．比一比，看看谁想出的含有定语从句的句子最多？

4、定语从句分为限定性定语从句和非限定性定语从句。

3、先行词：被定语从句修饰、限定的词或短语，称为先行词。