当陈述部分的主语是everyone,everybody, someone, nobody, no one,none, anyone, somebody等合成不定代词时, 在非正式文体中,附加疑问句中的主语通常用he或they。例如:
Someone opened the door, didn't he/they? 有人开了门,是不是?
Nobody went to the cinema, did they? 没人去看电影,是吗?
当陈述部分的主语是everything, nothing, something, anything等合成词,附加疑问句中的主语用it。例如:
Nothing serious happened, did it? 什么事情也没有发生,对吗?
Everything is ready, isn't it? 一切准备就绪了,不是吗?