一、作形容詞 enough作形容詞時，意思是“充足的”、“足夠的”，后面常跟for引導的短語或可數(shù)名詞。

　　1、作定語。

　　修飾不可數(shù)名詞或可數(shù)名詞復數(shù)，位置可前可后，例如：

　　(1) We have enough food for a month. 我們有足夠維持一個月的食物。

　　(2)We have enough time/time enough to get to the station.我們有足夠的時間趕到車站。

　　(3)Are there enough seats for four persons? 有沒有足夠四個人的座位?

　　2、作表語。例如：

　　(1)That’s enough.Thank you. 夠了，謝謝。

　　(2)Six chairs should be enough.六把椅子應該足夠了。

　　二、作副詞 enough作副詞時，意為“充足地”、“足夠地”，可用來修飾形容詞和副詞，且必須放在它們之后，例如：

　　(1)I was foolish enough to believe her.

　　我相信了她，真是太傻了。

　　(2)This room is large enough for us to sleep in.

　　這個房間足夠大，我們可以睡.(不可說enough large) (3)He knows the situation well enough.

　　對他情況了解得非常清楚。(不可說enough well”) (4)He has eaten enough. 他已經(jīng)飽了。(enough還可以修飾副詞和動詞，但必須后置。)

　　三、 作代詞 enough作代詞時，意為“足夠”、“充足”，充當主語、賓語.當其作主語時，看作單數(shù)。例如：

　　(1)Enough has been said on how to learn English well.

　　關于如何學好英語已經(jīng)說得足夠多的了。 (2)I have enough to do today. 今天我有足夠多的事要做。

　　四、 當enough和另一形容詞同時修飾一個名詞時，有兩種不同的位置。

　　enough放在形容詞之后，此時，enough修飾形容詞時，結構為“adj.+ enough+名詞”, 表示“足夠…的…”, 如：

　　(1) a large enough room一間足夠大的房間 (2) a deep enough well 一口足夠深的井 五、專項練習

　　1、He ran and ran, but he couldn’t run_____ to catch the bus.

　　Fast enough B. enough quick C. enough fast D. enough quickly

　　2、Mike is only 15 years old. He is not ______ to get a driver’s license. A、old enough B. enough old C. young enough D. enough young 3、He is______ school.

　　A、old enough going to B. enough old to go to C、old enough to go to D. enough old going to 4、He walked______. I couldn’t _____ with him

　　A. fast enough„catch on B. fast enough„catch up C. enough fast „catch on D. enough fast„catch up 六、參考答案 1---4 CBBB