there will be a birthday party on saturday 对划线部分提问

问题描述:

there will be a birthday party on saturday 对划线部分提问

there will be a birthday party on saturday 对划线部分提问
如果对on saturday划线部分提问 :When will there be a birthday party?
如果对birthday划线部分提问 :What party will there be on saturday?

When will there be a birthday party?