who引導限定性定語從句，who可作主語，也可作賓語。例句：

一：關係代詞who作主語:

當定語從句的先行詞指人時，用關係代詞who來引導,也可以用that引導.

1.The man who/that gave a talk is an old scientist.

2.Do you know the girl who/that just cam in?

二：關係代詞作who賓語,常用whom來引導,關係代詞也可以省略

1.The tall man (who/whom/that/省略) you just shook hads with is Tom's father.

2.Is that the man (who/whom/

that/省略)you want to see?

who引導的定語從句名言：

1.People who cannot find time for recreation are obliged sooner or later to find time for illness.

沒有時間娛樂的人， 遲早得

2. He who lives with his memories becomes old. He who lives with plans for the future remains young.

終日懷舊催人老， 計劃未來葆青春。

3. He who has good health is young, and he is rich who owes nothing.

健康葆青春， 無債即富足4.Happy is he who only desires what he may and does what he ought.He who does not rise early never does a good day's work. 起床不早，一天的工作幹不好。