(1)谁(what person or people)(作疑问词)：W～is that woman over there/told you that/would like to come? 那边的那位妇女是谁/谁告诉你的/谁愿意来? I wonder/don't know～took my umbrella. 我想知道/不知道谁拿了我的雨伞。I don't know～to ask advice from. 我不知道该向谁征求意见。W～are you going to invite/did she see a moment ago? 你要邀请谁/她刚才看见谁了?

(2)……的人(that person or those people)(作关系词)：My brother is a technician～works in a garage. 我兄弟是在汽车修理厂工作的技师。It was he/There was a man (～) I want you to meet. 他就是我想让你见的人/有一个人我想让你见见。It is he～wants to see you/left first. 就是他想去看你/第一个离开的。The thief，～was arrested，confessed that he stole the car. 那个贼被捕了，他供认自己偷了汽车。The boss，～they were talking about just now，was very hard on them. 他们刚才议论的那位老板对他们十分严厉。We met the president，～the newspaper had reported， was gravely ill. 我们见到了总统，报纸曾报道说他病得很厉害。

who am I/are you/is she to do sth? 我/你/她有什么权利或资格做某事：W～are you to tell me not to do this? 你有什么权利不让我做这件事?W～is he to speak to us in such a rude manner? 他有什么权利这样粗鲁地对我们讲话?

who's who 1)谁是谁： I don't know yet～is～in this company. 在这个公司里我现在还不知道谁是谁。2)名人录(大写)：You can find his name in W～'s W～. 你可以在名人录上找到他的名字。