i am just a vampire.这句话对不?是a 还是an?

i am just a vampire.这句话对不?是a 还是an? 英语翻译I am a vampire I have lost my fangs I am a vampire I am am i just a I am not a superman,I was just an ordinary I am a teacher.这句话a teacher是表语还是teacher是表语 I am an American还是I am an American man那句话对? I am just a corpse. i am just a chubby I just a boy对吗?还是要I am just a boy? I am going to school just right 这句话是对的么? I am a student.对还是I am student. I am a boy.回答我也是.是Neither am I 还是either am i.哪个对为什么求解.