为什么是an American woman不是an America woman

为什么是an American woman不是an America woman He speaks English as though he were an American.为什么是he were而不是he was There is going to be an American film tonight中的American为什么是主语在学牛津英语9AUnit1句子成分那里,我不懂这个,还有,哪位老师可以教一下我如何快速划分句子成分 Chaplin,for （whom) life had once been very hard,directed a film about life in an American factory.括号中为什么是whom. She is an American. She is an American. an american friend是什么意思? 是a American还是an American 什么是 African-American 什么是american eudcation system an NBA basketball game为什么是“an”? I'm(A) an English(B).He is an American(C).错误的为 [她]is an American girl She is an American ,__________? Joan is an American girl .. ----American boy (a/an/the) an American boy 为什么冠词用an? an hour的不定冠词为什么是an为什么是AN不是A