2017中考英语总复习课件专题8:冠词(共19张PPT) •考点一:不定冠词a / an的基本用法 •(1) 泛指某一类人或某一类事物。如: •An elephant is much taller than a dog. •大象比狗高多了。 •(2) 用于序数词前,表示“又一,再一” 。如: •I have seen the film. But it is so interesting that I want to see it a second time. •我已经看过那部电影了,但它如此有趣以至于我想再看一次。