did you have fun watching the game 里面为什么用watching 而不是 watch
问题描述：
did you have fun watching the game 里面为什么用watching 而不是 watch
答
这是固定的结构 have fun doing sth.做某事很有乐趣,很享受做某事
就像 have difficulty/ trouble （in) doing sth.做某事很困难,也是固定结构