为你解答。
These boys are (having great fun).
have fun,玩得开心。
你好,
可以填 :
having a good time
或者 enjoying themselves
或者 playing happily
或者 having great fun
These boys are __palying___ __very___ __happily___
These boys are __playing___ __with___ _joy____
These boys are __having___ __great___ _fun____
happy to play.
These boys are happy to play。
having great fun
你好,
这句可翻译成: These boys are playing happily.