英语语法问题是have great fun 还是have a great fun

很有趣的正确表达是：

have great fun

语法说明：

不可数名词前面不能用不定冠词a或an来修饰。

词汇解释：

fun

|fʌn|

[不可数名词] enjoyment; pleasure; a thing that gives enjoyment or pleasure and makes you feel happy 享乐；乐趣；快乐；享乐的事

例句：

‘What fun! ’ she said with a laugh.

“真开心呀！”她笑着说。

It's not much fun going to a party on your own.

独自一人参加聚会没什么意思。