不定冠词

不定冠词有两种形式:a和an

a 用于辅音 (不一定是辅音字母)开头的名词前,如:a teacher/university/house

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an 用于元音(不一定是元音字母)开头的名词前,如:an apple/hour/egg/orange

不定冠词的用法:

1.表示某类人或事物当中的一个,如:

Her brother is a college student.

2.表示数量:即表示数量"一",如:

A year is divided into twelve months.

3.表示同一性,说明事物的同一特征,大小,程度或性质。如:

This hat and that one are of a shape.

4.指事物的单位,相当于every any, 如:

She kept on writing to her parents once a month.

不定冠词的常见词组搭配:a lot of ; a good many; as a result; as a matter of fact

定冠词the 的常见用法:

1. 特指某人或某物时

(1)特指上文已提过的人或物。如:

He came across an old friend in a shop. The friend was now a general manager.

(2)特指双方都知道的人或物。如:

Did you park the car at the corner?

(3)特指形容词高级、比较级所修饰的某个确定的人或物。如:

He chose the bigger orange, but she chose the smallest one.

2.世界上的名词及乐器名词前,如:

The earth is bigger than the moon, but smaller than the sun.

Do you like to play the piano the violin?

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