This is my teacher.怎么变为一般疑问句?

This is my teacher.怎么变为一般疑问句? This is my coat .变为一般疑问句 This is my book 变为一般疑问句 This is my mother 变为一般疑问句 This is my teacher变成一般疑问句.He is from the U.S.A.变为复数 Miss liu is my math teacher.变为一般疑问句 My father is a good teacher.(变为一般疑问句） This is my shirt.（变为一般疑问句） This is my teacher.(变一般疑问句） this shirt is expensive 变为一般疑问句怎么改 This is your room.变为一般疑问句 He is my teacher?改为一般疑问句 应该怎么改?