please have fun during the tour.为什么不能填have a fun、have funny、?

please have fun during the tour.为什么不能填have a fun、have funny、? have fun have fun have fun的近义词have fun是什么? have much fun还是 have many fun have fun doing sth have fun in doing have a fun have great fun. have great fun have fun doing造句 have fun同义词 have fun with Did you have fun? have fun doing sth. have fun 怎么翻译 Have Some Fun 歌词 have fun =什么