what great fun it is to go hiking!为什么因为fun是不可数名词不加a,而不说它抽象名词具体化呢?还是因为fun不属于抽象名词具体化的范畴?

为什么是what great fun it is!而不是what a great fun it is! 英语的fun可数吗?是What a great fun it is!还是What great fun it is! what great fun it is+to do sth 吗 what great fun it is ____ (sit )on the balcony what great fun it is to go hiking in such fine weather!和what a great fun .!哪个对?为什么? fun 可数吗,What.a great fun it is .正确吗 为什么what great fun it is 这个句子里,great前没有a? ——it is to jump into a river in summer a how fun b how funny c what a great fun d what great fun __ it is to play with snow in winter!A How fun B what a fun C How great fun D what great funA 不行吗 How+adj 英语it is to jump into a river in summer!A how fun B how funny C what great fun D what a great fun为什么 请问那个正确 What a great fun it is to go surfing; What great fun it is to go surfing 请问那个正 what great fun it is to go camping in such fine weather,为什么不说what a great fun it is to gocamping in such a fine weather? （ ）it is to meet old friends in a strange place!A.what great fun B.what a great fun C.how great fun D.how a great fun it is great fun后应加什么时态 It is great fun啥意思? What ___________ it is to go hiking in __________ weather!A.a great fun; such fine B.great fun; such a fine C.great fun; such fine D.a great fun; such a fine ___________ it is to play football every afternoon A.What great fun B.How a funC.What a great fun D.How funnny it is a great fun to do sth.还是it is great fun to do sth