is
everyone是不定代词,助动词相当于三单对待 have a good time译为玩的开心
而having 是“现在进行时”,所以是is
类似的anyone,someone,anybody,somebody,any(some)where等等,都是如此
is
everyone是不定代词,助动词相当于三单对待 have a good time译为玩的开心
而having 是“现在进行时”,所以是is
类似的anyone,someone,anybody,somebody,any(some)where等等,都是如此