everything,something,anything,nothing,everybody这些不定代词作主语时,反义疑问句的主语是什么everything,something,anything,nothing,everybody,somebody,anybody,nobody这些不定代词作主语时,反义疑问句的主语是什么

陈述部分主语是指示代词或不定代词everything, that, nothing, this, 疑问部分主语用it。　　Everything is ready, isn't it?
陈述部分主语是不定代词everybody, anyone, somebody, nobody, no one 等，疑问部分常用复数they，有时也用单数he。
　　Everyone knows the answer, don't they?　(does he?)
　　Nobody knows about it, do they? (does he?)

指人的代词，一般用they, 指物的代词，一般用it

everything,something..用it
everybody,...,一般用they,但也可以用he或she