1. Enough has been said on this subject. 關於這壹問題說得已經足夠多的了。
2. No, thanks. I've had enough. 不，謝謝。我已吃飽了。(enough=
enough food)
註意當enough後的名詞前有冠詞、形容詞性物主代詞、指示代詞或其本身就是代詞時，要用介詞of。如：
We've had enough of your coldness. 我們已經受夠了妳的冷漠。
二、enough作形容詞，意思是"足夠的;充分的"，常與for或不定式連用，可以作定語或表語。作定語置於被修飾的名詞前後均可，前置時強調enough，後置時強調被修飾詞。如：
1. (NMET95第22題題幹) I hope there are enough glasses for each guest to have ______.
2. Five men will be quite enough. 五個人就足夠了。
三、enough作副詞的意思是 "十分地;充分地;足夠地;充足地"，置於被修飾的形容詞或副詞之後，常與不定式或介詞for連用 ，在句子中作狀語，表示程度。如：
1. (NMET93) -Mum, I think I'm ________ to get back to school.
-Not really, my dear. You'd better stay at home for another day or two. (Key：C)
A. so well
B. so good
C. well enough
D. good enough
2. (NMET98)If I had ________, I'd visit Europe stopping at all the small interesting places. (Key：A)
A. a long enough holiday
B. an enough long holiday
C. a holiday enough long
D. a long holiday enough
3. When they reached the burning building they found that their ladders were not long enough to reach the people who were trapped. 當他們靠近烈火熊熊的大樓時，他們發現梯子不夠長，夠不著那些被火圍困的人。
4. (NMET95第26題題幹) -You were brave enough to raise objections at the meeting.
-Well, now I regret ________ that.
四、enough作感嘆詞時意思是"夠了;停止;住手;不要再繼續了"，用以表達不耐煩或惱怒。如：
You've been practising the violin all afternoon. Enough! 妳整個下午都在練小提琴。夠了！
五、用在"主語+cannot...+enough"句型中該句型形式上是否定句型，實際上表達的是肯定意義，意思是"再……也不過分；越……越……"。如：
I cannot thank you enough. 我對妳感激不盡。(我怎麽感謝妳都不算過分。)
六、enough還可以用於以下的短語中
1. sure enough 果真；確實。如：
He said he would come, and sure enough he came. 他說要來，果然來了。
2. well enough 還不錯； 還可以； 相當； 很； 極。如：
You know well enough. (口)妳明明知道。(妳心裏明白。)
3. be good / kind enough to do sth. 勞駕； 務請做某事。如：
Be good / kind enough to reply early. 請早日賜復。