按要求写句子。

1. The math books are on the desk.(改为否定句)

    The math books               on the desk.

2. The video tapes are in the bookcase.(对画线部分提问)

                 the video tapes?

3. My hat is on the chair．(改为一般疑问句并作否定回答)

               hat on the chair?  No,              .

4．Is that her plant?(改为复数句)

                 her         ?

5. Is it on the floor?(改为复数句)

                 on the floor?