結構︰…how/what/when/where/which/whose(+名詞)+to-不定詞…
說明︰此句型意為“應該如何做/何時做/何地做/做哪些事…”。what,whom,which 為疑問<名詞>,做其后 <不定詞詞組>中<動詞>的<受詞>,否則就做<介系詞>的<受詞>.how,where,when,why均為<疑問副詞>.<不定詞詞組>中的<動詞>若為<及物動詞>,則后面要有<受詞>;若為<不及物動詞>,則不需要<受詞>.
How do I know what to do and what not to do?
我怎么知道什么該做,什么不該做?
He showed me how to use the tape recorder.
他教我如何使用這臺卡式錄音機。
What to do is one question, and how to do it is quite another.
應該做什么和應該怎樣做是完全不同的兩個問題。
The trouble is when to start the business.
麻煩在于應該什么時候開始這項工作。
We haven't decided where to go for lunch.
我們還沒有決定去哪里午餐。
I don't know which advise to follow.
不曉得該聽誰的勸告。
I learned what expressions to use in public.
我懂得在公共場所中應使用什么措辭。
How to begin is more difficult than where to stop.
如何著手遠比在何處結束來得困難。
You should know what to cook to eat.
你應該知道該煮什么來吃。
The problem is when to get the money we need.
問題是什么時候能得到我們所需要的錢。
There are so many fancy cars on display here that I don't know which to buy.
有這么多的豪華汽車在此展出,我不知要買哪一輛才好。