【改错】His son is enough old to go to school. (×)

【解析】enough作副词时,意为“足够地”“充分地”“相当地”“很”等意思,修饰形容词、副词时,必须放在这些词之后,结构为“adj/adv + enough”, 表示“足够…的”。例如:

①Liu Xiang runs fast enough.刘翔跑得足够快了。(修饰副词fast)

②The room is big enough.这个房间足够大了(修饰形容词big)

【改正】本题应该为:His son is old enough to go to school. (√)

他的儿子到上学的年龄了。(年龄足够大,可以上学了)

【知识拓展】除此以外,还要注意enough以下用法:

1. enough做形容词,意为“足够的”,修饰名词时,一般要放在名词之前。(有时可放名词之后,但不必考虑)。例如:

①15 minutes is enough time for you to have a coffee.你喝杯咖啡15分钟足够了。

②I have enough money to pay for the taxi.我有足够的钱付车费。

③Have we got enough sandwiches for lunch?我们午餐的三明治够吃吗?

2.用作代词,意为“足够;充分”。例如:

①Enough is enough.适可而止。(谚语)

②―Would you like another piece of bread?你想再来一块面包吗?

―I have had enough. Thank you very much.我已经喝够了,非常感谢。

【常用句型】

“形容词/副词 +enough +(for +sb. ) +to do”结构:“对某人来说,足够....可以...”。

The book is easy enough for you to read. 这本书很简单,你们可以看懂。

从词性角度分析enough的核心用法