A主格
用who或that，通常用who：
The man who robbed you has been arrested.
搶劫你的那個人已經被逮捕了。
The girls who serve in the shop are the owners daughters.
在店裡接待顧客的那幾個女孩都是店老闆的女兒。
Only those who had booked in advance were allowed in.
只有那些預先訂票的人可以進去。
Would anyone who saw the accident please get in touch with the police?
凡親眼看見發生事故的人請與警方聯絡。
但是在all，everyone，everybody，no one，nobody和those後面，也可用that替代who：
Everyone who/that knew him liked him.
認得他的.人都喜歡他。
Nobody who/that watched the match will ever forget it.
看了這場比賽的人都不會忘記它。
B動詞的賓語
用whom，who或that。
指人的關係代詞的賓格形式是whom，但這被認為是十分正規的說法。在口語中經常使用who和that來代替whom(that 比who更常用);更加普遍的是索性把賓格關係代詞省略：
The man whom I saw told me to come back today.
