who后一定用单三吗？比如who are you？who are your parents play with?

Question

如题所述

Answer 1

不一定。要看主语是什么。如，
Who is the boy？Who does the boy live？
这两个问句均用单数，因为主语是单数第三人称the boy。
Who are you？Who are your parents play with？句子主语是you 和your parents，只能用复数形式。
此外，who 还可引导从句。如：
I don't know the boy who helps us repair the machine.此句中who引导定语从句,指的是the boy,故从句中谓语动词用help的三单现形式.
又如:
I don't know the boys who help us repair the machine.

Answer 2

要看后边。
定语从句要看被修饰的词。