You is a good teacher这句话错在哪里?

Mrs Black is a teacher 这句话哪里错了 Dog is a good pet for a 7-year-old boy.这句话错在哪里? she is good at badminton.这句话错在哪里? this city is still a good place where to live?这句话错在哪里 xxx is a very good teacher 这句话对么? Mrs black is a teacher .She is very kind .这句话哪里错了 she is good teacher这句话对不对 I hope you to become a teacher.这句话哪里错了? Judged from his book,he is a teacher.这句话哪里错了 If you like English,which is good.这句话哪里错了 Are you my English teacher?Yes,I`m.这句话错在哪里? "My English teacher is very strict with her work"这句话错在哪里了