What great fun it was! fun前可不可以加a?为什么?

What great fun it was! fun前可不可以加a?为什么? What great fun it was!fun前可不可以加a?为什么? 为什么what great fun it is 这个句子里,great前没有a? 为什么是what great fun it is!而不是what a great fun it is! what a great fun/what great fun为什么不可以用how great fun It was great fun.感叹句 it+was+great+fun是什么意思 What a great fun it is to go surfing; What great fun it is t what a great fun it is to go fishing和what great fun it is to what great fun it is to go hiking!为什么因为fun是不可数名词不加a,而不说它抽象名词 It was great fun!还是：it sounds great fun? 英语的fun可数吗?是What a great fun it is!还是What great fun it is!