I`m teacher 和 I`m a teacher 有什么区别?如题,谁能系统地给我讲一下?到底那个答案是对的？给我弄晕了。说错的人，拿出证据

问:I'm a teacher如何变为否定和疑问句. I‘m a teacher and I’m Chinses 中文是什么 I'm a man teacher.复数形式 I'm a teacher问题是什么? I,m a English teacher哪里有错? I'm a teacher的复数形式 i'm a teacher 改成复数句子 I'm a teacher ( )the woman is a teacher ,too. Are you a teacher or engineer?A,Yes ,Im a teacher B,Im an engineer C,NO,Im an engineer D Im teacher （ ）are you?i m your teacher.（ ）are you?i m a tea（ ）are you?i m your teacher.（ ）are you?i m a teacher. Are you a teacher?A I am B Yes,I'm C I'm not D No,I'm not I'm going to be a teacher.写问句 Are you a teacher?No,I 'm not. my name is miss I'm a teacher and Chinese. No.I'm from Engand Are you a teacher,too? I'm a teacher.变成一般疑问句?怎么改? I'm a teacher as you know,aren't you? i'm a teacher at the school on the corner