句型转换
（1） His mother works in a hospital.(就画线部分提问)
_____   ______his mother work.
（2）Robin is in the park.(变为一般疑问句)
_____Robin in the park?
（3）Can you help me one day?(作肯定回答)
_____,I______.
（4）They are sitting on the grass. (变为一般疑问句)
———they_____on the grass?