who
01
誰
used in questions to ask about the name or identity of one person or several people
例
Who are those people sitting at the back?
誰が後ろに座っている人たちですか ?
02
誰, その人
used to refer to people or animals with names
例
The person who is standing over there is my brother.
あそこに立っている人は私の兄です。
03
誰, その人
used to represent a person as the subject or object of verb or preposition in a sentence
例
I know who did it.
私は誰がそれをしたのか知っています。
