who
pronoun /huː/
/huː/
Idioms - used in questions to ask about the name, identity or function of one or more people
（询问姓名、身份或职务）谁，什么人 - Who is that woman?
那个女的是谁？ - I wonder who that letter was from.
我不知道是谁来的信。 - Who are you phoning?
你在给谁打电话？ - Who's the money for?
这是给谁的钱？
- Who is that woman?
- used to show which person or people you mean
（表示所指的人） - The people who called yesterday want to buy the house.
昨天打电话来的人想买这座房子。 - The people (who) we met in France have sent us a card.
我们在法国结识的人给我们寄来了一张贺卡。
- The people who called yesterday want to buy the house.
- used to give more information about somebody
（进一步提供有关某人的信息） - Mrs Smith, who has a lot of teaching experience at junior level, will be joining the school in September.
史密斯太太将在九月份加入这所学校，她在初级教育方面颇有经验。 - And then Mary, who we had been talking about earlier, walked in.
随后玛丽走了进来，我们刚才还在谈论她呢。
compare whom - Mrs Smith, who has a lot of teaching experience at junior level, will be joining the school in September.
词源Old English hwā, of Germanic origin; related to Dutch wie and German wer.
Idioms
who am I, who are you, etc. to do something?
- used to ask what right or authority somebody has to do something
…凭什么；…有什么资格 - Who are you to tell me I can't park here?
你凭什么不让我在这儿停车？
- Who are you to tell me I can't park here?