句型转换
Grace likes bananas .(改否定句)
Grace                         bananas.
This is a box.  (改为复数形式)
          are             .
Your hat is on the desk. (对划线部分提问)
          is             hat?
The black trousers are 50 yuan. (对划线部分提问)
                    are the black trousers?
Thank you for your help.(改为同义句)
Thank you for                      .