enough用作名词时主要在句中用作主语或宾语。

have had enough of
不能〔不愿〕再容忍… be unable or unwilling to tolerate sth/sb any more
I'm surprised you haven't had enough of him yet.我很惊讶你还能忍受他。
I've had enough of their continual chatter.我已厌烦了他们喋喋不休的闲谈。

Not enough is known about this subject.对这个问题的了解还不够。
I've had enough, thank you.我吃饱了,谢谢。

［同义词］ adj. abundant, adequate, plenty
［反义词］ adj. inadequate
［词源］＜中古英语enongh(足够)

1.enough作形容词时,意思是“足够的,充分的”,在句中多作定语,一般修饰复数名词或不可数名词,可置于所修饰的名词之前,也可置于所修饰的名词之后。后者属于旧式用法。
2.当主语是it或是特定数量时, enough也可用作表语,其后常接for引起的短语或动词不定式。
3.enough用于修饰表示坏的品质的名词(如cheek, conceit, impudence)时,一般放在这些词的后面。

用作定语
▲～+n.
We have enough salesmen to cover the area.我们本地区有足够的售货员。
We have enough money to buy a car.我们有足够的钱购买一辆小汽车。
There's not enough food among a crowd like this.没有足够的食物分给这么一群人。
Did you have enough time?你的时间充裕吗?
▲n.+～
The fellow has cheek enough.那家伙脸皮厚。
We don't have time enough to finish the work.我们没有足够的时间去完成这项工作。
用作表语
▲S+be+～
Five men will be quite enough.五个人就足够了。
▲S+be+～+for n./pron.
￡200 isn't enough for all my expenses.200英镑不够我全部的开销。
Two apples is/are enough for me.两个苹果对于我足够了。
▲S+be+～+to-v
If each of us kicks in a small amount, it'll be enough to buy things for the party.我们每一个人捐一点钱的话,就足够买联欢会所需要的东西了。

enough, adequate, ample, sufficient
参见adequate条。

1.enough用作副词时,意思是“足够,充分”,一般应放在所修饰的形容词、副词或动词的后面。
2.enough还可作“相当地”“还可以地”解,这时在语气上起弱化作用,即语气上比不加enough时为弱。

curiously〔oddly, strangely〕 enough
稀奇的是… it is very curious, etc. that...
Strangely enough,I, too, met him yesterday.真够怪的,我昨天也遇见了他。

sure enough
果然 as expected
He said he would come,and sure enough he came.他说过要来,果然,他来了。

I was nearly drowned last night, but was fortunate enough to be saved.我昨天夜里差一点淹死,但真走运,有人把我救了。
Is this room large enough?这房间够大吗?
He plays well enough for a beginner.对于初学者来说,他弹奏得相当不错。
I don't like these pictures enough.我不太喜欢这些画。
I don't know him well enough to ask him for help.我和他不够熟,不便请他帮忙。
He didn't run fast enough to catch the train.他跑得不够快,没有赶上火车。
Would you be kind enough to let us know the date of your arrival?请你把到达的日期告诉我们好吗?
He isn't good enough for the exam.他功课不太好,考不及格。
The river is deep enough for swimming.在这条河里游泳水够深。