It's great fun playing with him. play为什么要用ing形式
问题描述：
It's great fun playing with him. play为什么要用ing形式
答
great fun后加动名词。所以是playing.
答
It's great fun + doing sth.
这是固定句型没有为什么。。。
答
很高兴能够在这里回答你的问题,这道题的正确答案应该为：
It's fun doing sth
固定句型,做某事很有趣