题目内容：

they are cleaning the windows.(改为一般疑问句） Tom is working.(改为一般疑问句）
Jim is singing.(改为否定句）
Kate is dancing.(划线部分是dancing,对划线部分提问）
She is sitting near the window .(划线部分是 near the window,对划线部分提问）

优质解答

1 Are they cleaning the windows?
2 Is Tom working?
3 Jim isn't singing.
4 What is Kate doing
5 Where is she sitting