enough可以作形容词、副词和代词。作形容词时,意思是“充足的”、“足够的”,后面常跟for引导的短语或可数名词作定语,作表语;作副词的时候,意为“充足地”、“足够地”,可以用来修饰形容词和副词,且必须放在它们之后;作代词意为“足够”、“充足”,充当主语、宾语。
1.作定语:修饰不可数名词或可数名词复数,位置可前可后,例如:
(1)We have enough time/time enough to get to the station.我们有足够的时间赶到车站。
(2)Are there enough seats for four persons?有没有足够四个人的座位?
(3)We have enough food for a month.我们有足够维持一个月的食物。
2.作表语
(1)Six chairs should be enough.六把椅子应该足够了。
(2)That’s enough.Thank you.够了,谢谢。
enough作副词时,意为“充足地”、“足够地”,可用来修饰形容词和副词,且必须放在它们之后。
(1)I was foolish enough to believe her.我愚蠢到相信她。
(2)This room is large enough for us to sleep in.这个房间足够我们睡在里面。
(3)He knows the situation well enough.他对形势了如指掌。
(4)He has eaten enough.他已经饱了。(enough还可以修饰副词和动词,但是必须后置。)
enough作代词时,意为“足够”、“充足”,充当主语、宾语。当其作主语的时候,看作单数。
(1)Enough has been said on how to learn English well.关于如何学好英语已经说得足够多了。
(2)I have enough to do.今天我有足够多的事要做。