what: 什么;多少
He knew, almost without looking at it, what ring it was.
他几乎连看也没看一眼便知道是什么戒指
where: 去向;在什么地方
I wager you told him where you were going before he told you where he was going.
我敢打赌,在他告诉你他到什么地方去以前,你一定先把你的去向告诉他了。
when: 什么时候,几时
When did you see him?
你几时见到他的?
whom: 谁
Whom do you wish to see?
你想见谁?
how: 怎样,怎么; 用什么手段、方法〔疑问副词和连接副词两用〕
How would the relative velocity be altered if B were ahead of A?
假如B在A前面,那么相对速度怎样改变呢?