is cooking (a fun)?为什么不写funny

is cooking (a fun)?为什么不写funny That is a funny time for breakfast.这个句子中的funny为什么不是填fun? The mall is a really fun place to go.为什么用fun而不用funny?fun是名词、 Cooking is fun? cooking is fun... what fun day it is?为什么用fun,不用funny What an _____ story it is?A.funny B.interesting C.fun 为什么?、 The trip is ___.We have great ____ A fun,funny B funny,funny it is _____to have a picnic A 、fun B、funny 为什么说a fun day 不说a funny day The Downtown is always ( ).A fun B funny It is great ___.A.fun B.funny