冠词 一、不定冠词的用法 1.泛指某一类人或事物，相当于any。 A square has four sides. 2.泛指某人或某事物。 A bad workman quarrels with his tools. 3.表示一个，相当于one。 I have a mouth，a nose and two eyes. 4.表示“每一”。 Take this medicine three times a day. 5.表示“同一”，相当于the same。 The two boys are of an age. 6.用在某些抽象名词前，表示“一种、一类、一份、一场、一 阵”等。 They were caught in a heavy rain. 7.用于专有名词之前表示某一个。 A Mr. Li is asking to see you at the school gate. 8.用于某些固定词组中。 a few ，a lot of ，a bit ，have a rest ，take a bus ，have a good time ，live a happy life 【说明】a和the
