广州新东方酷学酷玩夏令营  英语语法课堂 讲解不定冠词的用法
1指一类人或事，相当于a kind ofa plane is a machine that can fly.

2第一次提及某人某物，非特指a boy is waiting for you.有个男孩在等你。

3表示“每一”相当于every，onewe study eight hours a day.

4表示“相同”相当于the samewe are nearly of an age.

5用于人名前，表示不认识此人或与某名人有类似性质的人或事— hello, could i speak to mr. smith?

—sorry, wrong number. there isn't______ mr. smith here.

a. 不填 b. a c. the d. one

that boy is rather a lei feng.(活雷锋)

6用于固定词组中a couple of, a bit, once upon a time, in a hurry, have a walk, many a time

7用于quite, rather, many, half, what, such之后this room is rather a big one.

8用于so(as, too, how)+形容词之后she is as clever a girl as you can wish to meet.

9用于抽象名词具体化的名词前success(抽象名词)→a success(具体化) 成功的人或事

a failure 失败的人或事 a shame 带来耻辱的人或事

a pity 可惜或遗憾的事 a must 必需必备的事

a good knowledge of 精通掌握