一、用法不同
1、who
pron. (代词)
1)who用作疑问代词时,意思是“谁”,一般只用来指人,在句中用作宾语或主语。
2)who用作限制性或非限制性的关系代词,意思是“…的人,那个…”“他,她,他们”,在句中作主语。
3)指某一组织机构的成员时也可用who,此时应用复数形式的谓语。
2、whom
pron. (代词)
1)whom是who的宾格,在正式文体中常作宾语,用作疑问代词或连接代词时非正式文体往往用主格代替,若紧跟在介词之后则只能用whom。若在从句中用作表语则只能用who,不能用whom。
2)whom用作关系代词引出定语从句修饰指人的先行词时意思是“他,她,他们”,在定语从句中作宾语,通常被省略或用who, that代替。
3)whom用于非限制性定语从句中作动词或介词的宾语时不能省略。
二、词源不同
1、who,直接源自古英语的hwa,意为谁。
2、whom,直接源自古英语的hwam,意为谁(宾格)。
三、词性不同
1、who既可以做代词也可以作连词,意思是谁。
如:Who do you think you are?
你以为你是谁?
2、whom是who的宾格形式,表示...的人。
如:I don't know whom he has in mind for the job.
我不知道他想让谁来做这项工作。
who whom 都指代人. who 可作定语从句的主语和宾语,whom只作宾语.
作宾语时who/ whom都可以省略 .
当关系代词前有介词时,用介词+Whom 结构.如
He is the boy who came to our class yesterday
He is the boy (who / whom) I helped yesterday
He has a sister of whom he is proud
who引导定语从句时,在其中充当主语;
whom 引导定语从句时,在其中充当宾语。
就是这样。
如: Tom is a man whom I respect so much. (whom 充当宾语)
Tom is a man who is hard--working. (who 充当主语)
who: 主格, 在从句中作主语
The student who answered the question was John.
whom: 宾格,在从句中作宾语
Chaplin, for whom life had once been very hard, was a success as an actor.
He is the student whom you think to be worthy of your praise.
He is the student who you think is worth praising.
定语从句中, 作主语用who
作宾语,用whom/ who
介词后面用whom