have you finished your homework?Yes, I have. No, I haven't.
have you had lunch?Yes, I have. No, I haven't.
have you writing teh composition?Yes, I have. No, I haven't.
Have you missed the movie? Yes, I have. No, I haven't.
当have放句首提问时,相当于have为
助动词,用
现在完成时,谢谢采纳~