来源:网络资源 2022-10-17 17:39:04
不定冠词的用法
a 用于辅音音素起首的单词前,an 用于元音音素起首的单词前。
1、当第一次提到某人或某物时,用 a 或 an 起介绍作用,如:
What is this? It is a bus.
Who is she? She is a doctor.
2、表示泛指一类人或物
A snake is a cold-blood animal; A plane is a machine that can fly.
3、表示某一类人或事物的任何一个,如:
She is a teacher;That is an apple;There is an elephant in the zoo.
4、可用于某些词组,是该词组不可缺少的组成部分。
如: a long time,a little,a few,at a time,have a try,take a chance
5、表示“每一个”的意思。
如:three times a day
6、可用于抽象名词之前,使抽象名词具体化。
如: I am quite at a loss; The little child is a joy to his parents.
7、用于物质名词之前,使物质名词普通化。
如: He drew out a tin of pine cone. They made a fire to get warm.
注意:
1、不定冠词 an 用在以元音(不是字母,而是发音)起首的名词或其他以元音起首的词之前,不定冠词 a 用在以辅音起首的名词或其他以辅音起首的词之前。
2、u 和 h 有时在单词中发元音,有时却读作辅音或不发音。如:
I have been waiting for an hour;
He is an honest young fellow;
A hammer is a useful fool.
3、英语中有些字母,如a, e, i, o, f, h, l, m, n, r, s, x。由于它前头第一个音是元音,所以在单独使用或作缩略词的第一个字母时,应使用“an”,如:
There is an “n” in the word “no”.
An MP means a member of parliament.
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