是看后面的形容词还是名词的前面是元音还是辅音字母?

比如这个：to answer （ ） easy question

to answer an easy question.

The reason that we use "an" instead of "a" is that we don't want to have to vowels to be together.

看开容词的首字母发音是不是元音，不是元音用a

eg: a beautiful girl ,就是不定冠词加形容词加名词

看形容词。