who 引導的定語從句,WHO 代的是從句中的主語,所以要用who而不是whom
看缺什么成分,缺主語用Who缺賓語用whom
1.who指人,在從句中做主語
(1) The boys who are playing football are from Class One.
(2) Yesterday I helped an old man who lost his way.
2. whom指人,在定語從句中充當賓語,?？墒÷?
(1) Mr. Liu is the person (whom) you talked about on the bus.
(2) Mr. Ling is just the boy whom I want to see.
注意：關系代詞whom在口語和非正式語體中常用who代替,可省略.