簡單地說就是他們所充當?shù)木渥映煞质遣灰粯拥臉菍?2
who 可以做主語,又可以做賓語
whom只能做賓語
who和whom在定語從句中作關(guān)系代詞時：
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(guān)系代詞whom在口語和非正式語體中常用who代替,可省略