You use whom after certain words, especially verbs and adjectives, to introduce a clause where you talk about the name or identity of a person or a group of people.
近义词
who
双语例句
例：
He asked whom I'd told about his having been away.
他问我对谁说过他不在的事。
PRON. 代词
1.?用在关系从句的句首，具体指明被谈论者或给出更多相关信息等
You use whom at the beginning of a relative clause when specifying the person or group of people you are talking about or when giving more information about them.
双语例句
例：
One writer in whom I had taken an interest was Immanuel Velikovsky.
伊曼纽尔·韦利科夫斯基是一位令我感兴趣的作家。
QUEST. 疑问词
1.?谁（用于询问姓名或身份）
You use whom in questions when you ask about the name or identity of a person or group of people.