how to do something When to do something Where to do sh.What to do...
问题描述：
how to do something When to do something Where to do sh.What to do...
分别中文,举例,中文
答
how to do sth = 如何做某事,如 how to run the machine = 怎样开这个机器；
when to do sth = 什么时候做某事,如 when to hold the meeing = 什么时候召开会议；
where to do sth = 在哪里做某事,如 where to plant trees = 在哪里栽树；
what to do = 做什么,通常用作不及物,如 I don't know what to do = 我不知道该怎么办.