/hu:; hu/
interrog pron
1 (used as the subject of a v to ask about the name, identity or function of one or more people 用作动词的主体, 用以询问人的姓名、身分或职位)
*Who is the woman in the black hat? 戴黑帽子的那个女的是谁?
* I wonder who phoned this morning.我不知道今天上午谁打来过电话.
* Who are the men in white coats? 穿着白大衣的那些男的是什么人?
* Do you know who broke the window? 你知道是谁把窗户打破的吗?
2 (infml 口) (used as the object of a v or prep 用作动词或介词的宾语)
*Who did you see at church? 你做礼拜时看见谁了?
* Who are you phoning? 你给谁打电话呢?
* Who shall I give it to? 我把这个给谁?
* Who is the money for? 这钱是给谁的?
3 (idm 习语) who am `I, are `you, is `she, etc, to do sth? what right, authority, etc have I, etc to do sth 我、你、她等有什么权利、资格等做某事
*Who are you to tell me I can't leave my bicycle here? It's not your house. 你凭什么不让我把自行车放在这儿? 这又不是你们家. (know, learn, etc) who's `who (be informed about) people's names, jobs, status, etc （知道）人的名字、工作、身分等; （了解）谁是谁
*You'll soon find out who's who in this department. 你很快就能弄清楚这个部门每个人的情况.

rel pron 关系代词
1 (a) (in clauses which define the preceding n 用于限定先行名词的从句中)
*the man/men who wanted to meet you 想要见你的人
* The people who called yesterday want to buy the house. 昨天打来电话的人想买这所房子.
(b) (in clauses which do not define the preceding n 用于不限定先行名词的从句中)
*My wife, who is out at the moment, will phone you when she gets back. 我们太太现在出去了, 等她回来给你去电话.
* Mrs Smith, who has a lot of teaching experience, will be joining us in the spring. 史密斯夫人很有教学经验, 她将在春天来和我们一道工作.
2 (used as the object of a v or prep 用作动词或介词的宾语)
(a) (in a defining clause, where it can be omitted 用于限定性从句中, 此时who字可省去不用)
*The couple (who) we met on holiday have sent us a card. 我们度假时遇到的那对夫妇给我们寄来一张明信片.
* The boy (who) I spoke to a moment ago is the son of my employer. 那个男孩, 就是我刚才和他说话的那个, 是我们雇主的儿子.
(b) (in a non-defining clause 用于非限定性从句中)
*Mary, who we were talking about earlier, has just walked in. 玛丽, 我们刚才还说她来着, 已经进来了. =>Usage at whom 用法见 whom.

pron
[Language: Old English;Origin: hwa]
used to ask or talk about which person is involved, or what the name of a person is
　Who locked the door?
　Who do you work for?
　Who's that guy with your wife?
　They never found out who the murderer was.
　She wondered who had sent the flowers.
who to ask/contact/blame etc
　He doesn't know who to vote for.
who on earth/in the world etc
(=used for emphasis when you are surprised, angry etc)
　Who on earth would live in such a lonely place?
　Who the hell are you?
used after a noun to show which person or which people you are talking about
　Do you know the people who live over the road?
　the woman who was driving
　She was the one who did most of the talking.
used, after a comma in writing, to add more information about a particular person or group of people that you have just mentioned
　I discussed it with my brother, who is a lawyer.
　Alison Jones and her husband David, who live in Hartlepool, are celebrating their golden wedding anniversary.
informal used to introduce a question that shows you think something is true of everyone or of no one
　We have the occasional argument. Who doesn't? (=everyone does)
　Who wants to come second? (=no one does)
who is sb to do sth?
spoken used to say that someone does not have the right or the authority to say or do something
　Who is she to order me around?
who's who
a) if you know who is who within a particular organization or group, you know what each person's name is and what job they do or what position they have
　I'm just getting to know who's who in the department.
b) a who's who of sth
a list of the important people within a particular organization or group - often used to emphasize that many important people are involved in something
　The list of competitors reads like a who's who of international tennis players.