you are a student 为什么不对?但可以说I am a student .究其原因请详解．谢了you are a student .好象应该是不加a 的．到底是什么呢？请求得到确切答案

Are you a student? Are you a Chinese student? 是you are a student还是you are student? you is a student.还是you are a student. You are a student.Is( ) sister a student,too? Are you a student? 什么意思 Are you a student 否定回答 Are you a student肯否定回答 Are you a student?做否定回答 You are a good student.(答句) You are a good student.怎样翻译 Are you a student 变否定句 Are you a student?是什么调 Are not you a high school student? Are you a student?否定回答 I ( )( )(相信)you are a good student Are you a university student?实际回答 You are a hard-working student是什么意思?