whom

whom /huːm/ W1 pronoun

XXthe object form of ‘who’, used especially in formal speech or writing 谁，什么人〔who的宾格形式，尤用于正式讲话或书面语中〕

Desperate for money, she called her sister, whom she hadn’t spoken to in 20 years.

因为急需用钱，她就给姐姐打了电话，她们已经20年没说过话了。

She brought with her three friends, none of whom I had ever met before.

她带来三个朋友，没有一个是我以前见过的。

In everyday spoken or written English, people usually use who rather than whom: 在日常英语口语或书面语中，人们一般用who，而不用whom

Who did you send it to?

你把它寄给谁了？

Whom is usually used only in the phrases one of whom, none of whom, some of whom etc. whom一般只用于one of whom，none of whom，some of whom等短语中。

Examples from the Corpus

whom• I spent two hours talking to Kaz, whom I'd met only once before.• She had three lovers, none of whom knew about the others.

Origin whom

Old English hwam

Chinese

Corpus