主语是单数时,谓语动词一般是单数,但有时因谓语动词之后有复数名词,谓语动词也可用复数; what引导宾语从句时,常置于谓语之后,用作表语时,放在系动词之后。what还可引导让步状语从句,意思是“不管…”。还可接动词不定式短语。
what有时候可解释为whatever，表示“不管怎么样”。
例句：
For what do we live, but to make sport for our neighbours, and laugh at them in our turn?
我们活着是为了什么？不就是给邻居当笑柄，再反过来笑他们。
Instead of complaining about what's wrong, be grateful for what's right.
别抱怨不好的.事，要对好的事心存感恩。
A fellow doesn't last long on what he has done. He's got to keep on delivering as he goes along.--Carl Hubbell, Baseball Player
靠过去完成的无法让人保有成功，必须在路上持续交出成绩。