whom和who都可用作疑问代词,who是主格,whom是宾格。另外whom和who同为定语从句的关系代词,如果定语从句的先行词是指人,我们用who或者whom作连接词,区别是who作从句的主语或宾语(通常在口语中),whom只能作从句的宾语。
whom和who作疑问代词
(1)Who saw the thief?
谁看见了那个小偷?
(2)Whom are you trying to fool?
你想愚弄谁啊?
Who are you trying to fool?(在日常口语中,常用who代替whom作宾语。)
你想愚弄谁啊?
(4)who不能直接用在介词后,whom可以。例如:
To whom is she writing?她在给谁写信?
whom和who引导定语从句
Is he the man who wants to see you?
他就是想见你的人吗?(who在从句中作主语)
He is the man whom I saw yesterday.
他就是我昨天见的那个人。(whom在从句中作宾语)