Is she a teacher?--No,but she used to.此句后要be吗?这是一个对话.我不知道是用she used to be 还是she used to?

she is a teacher Is she a teacher? Is she a teacher she is a teacher. she is a teacher. ( )is she?she is a teacher. Is she a teacher?是什么意思 She is a teacher.(改为一般疑问句) She is a teacher 变一般疑问句 she is a teacher.变复数 she is a teacher 改为复数句 my aunt is a teacher.she ____english ()()your mother ()?She is a teacher . She is a English teacher.改错 She is a good teacher复数句 She is a teacher.(改为否定句 She is r___ a good teacher. she is a good teacher.的复数