The man who I just talked to is our headmaster.

The person (whom) you met on the bus is Mr Zhang.

He is the man whom / who I saw yesterday.

Football is a game which is liked by most boys.

This is the car (which) he bought yesterday.

A plane is a machine that / which can fly.

The man that / who is standing there is his father.

A child whose parents are dead is called an orphan.

I'd like a room whose window faces south.

The classroom whose door is broken will soon be repaired.

= The classroom the door of which is broken will soon be repaired.

As也可作关系代词, 常用于下列结构: as......as, so....as, such....as, the same....as.

I have the same watch as (have).

I have never heard such an interesting story as he tells.

二. "介词 + 关系代词" 引导的定语从句

The school (that / =which) he once studied in is very famous.

= The school in which he once studied is very famous.

Tomorrow I will bring here a magazine (that / which) you asked for.

= Tomorrow I will bring here a magazine for which you asked.

含有介词的动词短语一般不拆开使用, 如look for; look after; take care of等.

This is the watch which / that I am looking for.

若介词放在关系代词前, 关系代词指人时用whom, 不可用who或者that; 指物时用which, 不能用that; 关系代词是所有格时用whose.

The man with whom you talked is my friend. (T)

The man who / that you talked with is my friend. (F)

三. 关系副词引导的定语从句