whose 是所有格,意思是“谁的”,先行词指人或物,在定语从句中充当定语。后面一般跟名词。
whom 是who的宾格,意思是“谁”,先行词指人,在定语从句中充当宾语。
举例:
(1)The man who is talking with my father is our headmaster.
(who指the man,从句中做is talking with的主语)
(2)The man whose son is a doctor is our headmaster.
(whose指the man,从句中做son的定语,即the man's son)
(3)The man whom my father is talking to is our headmaster.
(whom指the man,从句中做is talking to的宾语)
who可以指代主句中的人称性质的主语或宾语;
whose是指代主句中的物主代词,像是her,his,their;
whom只能指代主句中的人称性质的宾语。