whom和who都可用作疑問(wèn)代詞,who是主格,whom是賓格。另外whom和who同為定語(yǔ)從句的關(guān)系代詞,如果定語(yǔ)從句的先行詞是指人,我們用who或者whom作連接詞,區(qū)別是who作從句的主語(yǔ)或賓語(yǔ)(通常在口語(yǔ)中),whom只能作從句的賓語(yǔ)。

(1)Who saw the thief?
誰(shuí)看見(jiàn)了那個(gè)小偷?
(2)Whom are you trying to fool?
你想愚弄誰(shuí)啊?
Who are you trying to fool?(在日常口語(yǔ)中,常用who代替whom作賓語(yǔ)。)
你想愚弄誰(shuí)啊?
(4)who不能直接用在介詞后,whom可以。例如:
To whom is she writing?她在給誰(shuí)寫(xiě)信?
Is he the man who wants to see you?
他就是想見(jiàn)你的人嗎?(who在從句中作主語(yǔ))
He is the man whom I saw yesterday.
他就是我昨天見(jiàn)的那個(gè)人。(whom在從句中作賓語(yǔ))