Question

a rain day与a raining day的区别

如上

Answer 1

rain是名词，雨 不可数名词
也是动词，下雨
EG:
Rain is so snorty！ 雨真令人讨厌。
Today rain . 今天下雨了。

raining是形容词 完全等同rainy day 意为 雨天、下雨的
Yesterday was raining.
Yesterday was rainy day.

rain 可作动词也可做名词
－动词：It will rain today.今天会下雨
—名字：The rain is smaller now.现在雨下小了。

raining是rain作为动词的进行时态
It is raining heavily outside. 现在外面雨很大。

rainy是形容词
It is a rainy day. 今天是个雨天

估计初中的填空选择会这样出题：
I can go swimming with you tomorrow because the weather report said it will _____. （这里填rain，为动词）
I can go swimming with you tomorrow because the weather report said it will be a ____ day. (这里填rainy。为形容词)
I can go swimming with you today because it is _____ outside. (这里填raining，动词进行时态)