have fun doing sth. 开心地做某事== enjoy oneself doing sth=have a good time doing sth
如:1.The kids are having fun playing in the park now.孩子们正在公园里开心地玩
2.we have fun playing football in the afternoon.我们今天下午踢足球很开心
追问you'll 什么意思?
追答“你将”的意思啊
例如:You'll have fun playing in the park .你将会在公园里玩得很开心