精选优质文档-倾情为你奉上冠词用法及练习(附答案)(一). 不定冠词的用法 1. 用在可数名词前表示 “一个” 相当于“one”(类指)。 There is a book on the desk. Ill return in a day or two.2.用在专有名词前,表示“某一个” 相当于“a certain”. A Mr. White is waiting for you downstairs.3. 表示 “一类” 相当于“any”(泛指). A horse is a useful animal.4. 表示 “每一” 相当于“per”. The doctor asked me to take the medicine three times a day. The envelopes are one yuan and twenty fen a dozen5. 用在某些固定词组中. a bit, a few, a little, a lot of, a piece