whom

誰、何人正式；who 的受格

Whom did you speak to about the missing files?

關於那些不見的檔案，你跟誰談過？

誰、所……的人關係代名詞，正式

She is the colleague whom everyone trusts completely.

她就是大家都完全信任的那位同事。

其中……人、當中的……用於 of whom、among whom 等

Thirty people applied, most of whom had no experience.

有三十人應徵，其中大多數毫無經驗。

敬啟者書信用語

The reference letter simply began "To whom it may concern."

那封推薦信開頭只寫著「敬啟者」。