American用a还是an为什么
用 a American 还是 an American
American前面用a还是an
是a American还是an American
American前加a还是an?
an American boy 为什么冠词用an?
I am an America(n) boy.用America还是American?
useful前面用an还是a?为什么?
----American boy (a/an/the)
She is an American girl 还是 She is American girl
应该是are you american还是在american前加an?
she is an American.还是she is American
“American” 和 “university”这两个名词前加 a 还是 an ,说明理由.