... enough + N + to do ...
結構︰主詞+動詞+enough+名詞+to-不定詞
說明︰此句型意為“有足夠的…可以做…”。該句型也可寫作“主詞+動詞+名詞+enough+to-不定詞”。 enough 在此做<形容詞>，修飾<名詞>，可置於該<名詞>之前或之後。
He has enough money (=money enough) to buy a car. 他有足夠的錢買一輛汽車。
He hasn’t enough sense to realize his mistakes. 他沒有足夠的辨別力去認識自己的錯誤。
It is a pity that he doesn’t have enough money to sponsor the project.
遺憾的是他沒有足夠的錢來支持這項計劃。
Will 2,000 dozens be enough for selling? 兩千打夠賣嗎?

... be good enough to ...
結構︰Would you be good enough+to-不定詞…?
說明︰此句型意為“請你…好嗎?”。本<句型>的意思和“Would you be so kind as to ...?”一樣， <語氣>較客氣。
Would you be good enough to turn the radio down a bit?請你把收音機的聲音關小一點好嗎?
Would you be good enough to keep silent? 請你保持安靜好嗎?
Would you be good enough to move a bit to the right? 請你往右邊移一點好嗎?

... how (+ N) + to do ...
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>，做其後 <不定詞片語>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>。<不定詞片語>中的<動詞>若為<及物動詞>，則後面要有<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? 我怎麼知道什麼該做，什麼不該做?
He showed me how to use the tape recorder. 他教我如何使用這台卡式錄音機。
What to do is one question, and how to do it is quite another.
應該做什麼和應該怎樣做是完全不同的兩個問題。
The trouble is when to start the business. 麻煩在於應該什麼時候開始這項工作。
We haven’t decided where to go for lunch. 我們還沒有決定去哪裡午餐。
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麼措辭。
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. 你應該知道該煮什麼來吃。
The problem is when to get the money we need. 問題是什麼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.
有這麼多的豪華汽車在此展出，我不知要買哪一輛才好。