疑问代词+动词不定式有哪些例句?（初二水平）

what to do /be
how to do/be
where to do
when to do
至于例句,这个直接造句就可以了.
如：I don’t know what to do\how to do it.
Could you tell me where to go to the nearest park?
I would like to know when to start.