"I do it for the fun of it"
"he is fun to have around"
"he became a figure of fun"
"he said it in sport"
"she asked for money and then the fun began"
"they began to fight like fun"
"her playfulness surprised me"
"he was fun to be with"
Have fun!
玩个痛快!
You're sure to have some fun at the party tonight.
今晚的宴会你必定会玩得很开心。
We have a lot of fun in the park.
我们在公园里玩得很快活。
have fun (in) v-ingI had great fun playing cards with them.
我和他们玩纸牌非常有趣。