一、
1. Enough has been said on this subject. 关于这一问题说得已经足够多的了。
2. No, thanks. I’ve had enough. 不，谢谢。我已吃饱了。(enough=
enough food)
【注意】当enough后的名词前有冠词、形容词性物主代词、指示代词或其本身就是代词时，要用介词of。如：
We’ve had enough of your coldness. 我们已经受够了你的冷漠。
二、enough作形容词，意思是“足够的;充分的”，常与for或不定式连用，可以作定语或表语。作定语置于被修饰的名词前后均可，前置时强调enough，后置时强调被修饰词。如：
1. (NMET95第22题题干) I hope there are enough glasses for each guest to have ______.
2. Five men will be quite enough. 五个人就足够了。
三、enough作副词的意思是 “十分地;充分地;足够地;充足地”，置于被修饰的形容词或副词之后，常与不定式或介词for连用 ，在句子中作状语，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
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. 当他们靠近烈火熊熊的大楼时，他们发现梯子不够长，够不着那些被火围困的人。
4. (NMET95第26题题干) —You were brave enough to raise objections at the meeting.
—Well, now I reGREt ________ that.
四、enough作感叹词时意思是“够了;停止;住手;不要再继续了”，用以表达不耐烦或恼怒。如：
You’ve been practising the violin all afternoon. Enough! 你整个下午都在练小提琴。够了！
五、用在“主语+cannot...+enough”句型中该句型形式上是否定句型，实际上表达的是肯定意义，意思是“再……也不过分；越……越……”。如：
I cannot thank you enough. 我对你感激不尽。（我怎么感谢你都不算过分。）
六、enough还可以用于以下的短语中
1． sure enough 果真；确实。如：
He said he would come, and sure enough he came. 他说要来，果然来了。
2． well enough 还不错； 还可以； 相当； 很； 极。如：
You know well enough. (口)你明明知道。(你心里明白。)
3． be good / kind enough to do sth. 劳驾； 务请做某事。如：
Be good / kind enough to reply early. 请早日赐复。
