第1个回答 2013-06-27
以元音开头的名词前和单词拼写以辅音字母开头,但该词的读音是元音开头都要用an 答案补充 泛指人,事或物的类别,相当于any 如: A plane is a machine that can fly. 用 a.
泛指某人或某物,如:A boy is waiting for you.
表示one或者every ,如:I have a mouth,a nose and two eyes.
用于固定词组,如:a few,alittle,a lot of 答案补充 用an 的。I have an apple apple 元音开头的名词
an hour 辅音开头发的元音