英语中不定冠词只有两个，即a,an。虽然它们拼写简单，但其用法却很多。现简述如下一表示数量“一”。例如：Thisisabook.这是一本书。Ihaveanapple.我有一个苹果。二笼统地指某人或某物，但不具体说明。例如：Agirlwantstoseeyou.有个女孩想见你。三指某一类人或事物中的任何 There are only two indefinite articles in English, namely a, an. Although they are simple to spell, they are used in many ways. A brief description will now be given of the number “one”. For example: Thisisabook. This is a book. Ihaveanapple. I have an apple. The second is generally referring to someone or something, but does not specify. For example: Agirlwantstoseeyou. A girl wants to see you. Three fingers refer to any kind of person or thing