精选优质文档-倾情为你奉上主+系+表结构练习题例子I am a teacher. 否定:I am not a teacher. (直接在be动词后面加not)一般疑问:Are you a teacher? (be动词和主语互换位置)特殊疑问:What are you? (针对划线部分提问)练习:1. He is a postman. 8. -Is she your sister? 否定:_ - _ (是的) 一般疑问:_ - _不是的)特殊疑问:_ 2. They are from Hunan. 9. -What is that?