高中英语语法不定冠词的用法

不定冠词的用法1、 泛指人或事物的类别，相当于any, 如:

A hammer is tool. A steel worker makes steel.

2、 泛指某人或某物。

A boy is waiting for you. There is a book on your desk.

3、 表one或every。

We work 8 hours a day. I go home twice a month.

4、 表示the same 的意思。

Birds of a (= the same) feather flock together; people of a kind come together.

5、 用在不可数名词前

a)(用在物质名词前)一种，一份

A large coffee for me. It was a wonderful tea.

b)(用在某些表示风、雨等的名词前)

It was clear daylight now and a fine rain was falling. There is a cold wind this morning.

c)(用在抽象名词前)一种

That is a great disappointment. It’s a pleasure to work with you.

6、 (用在某些专有名词前)某个叫…的人，一张…的画，一个象…的人等。

I saw a Mrs. Smith on the 12th at 2:00. He had a Van Gogh in the dining-room.

What a strange London they saw! He’s a living Lei Feng.

7、 用于某些固定词组中。

a few, a little, a good many, a lot of, all of a sudden, as a rule, have a cold等。

8、 在元音音素开头的名词前应用an, 如an apple, an English book。要以发音为准，并非以元音字母而定。如a university, an hour, an “h”, an X-ray examination.

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