I am a englishteacher in this school. 怎么改写成一般疑问句?怎么回答?

Are you a English teacher in this school?
Yes ,I am.回答是原句,就说明疑问句是正确的.

Are you an english teacher in this school ?

Yes,i'm

Not i'm not

Are you a englishteacher in this school?
Am I a englishteacher in this school？

be动词跟主语互换