为什么用a heavy rain,rain是可数名词吗?

为什么用a heavy rain,rain是可数名词吗? What a heavy rain!What a heavy rain!rain可以换成raining吗?为什么?. 为什么a heavy rain一场大雨要用heavy来修饰 There seems to be a heavy rain 还是There seem to be a heavy rain?为什么？ A heavy rain,不加不定冠词A是否成立,为什么? The heavy rain was accompanied by a strong wind.为什么用by而不用with 为什么是 what a heavy rain?rain 不是不可数的么,为什么加 a rain雨是可数名词还是不可数名词?.为什么我见过a heavy rain? what a heavy rain!(用how改写感叹句) heavy rain there is a rain,it rains___.(heavy) a heavy rain 可以这样说吗? 英语翻译下文 A heavy rain today There was a heavy rain(同义) a heavy rain 可以这样说吗? we were caught in a heavy rain. The area was______by a flood following the heavy rain.rain.为什么横线部分只能填struck,而不能用attacked Because he was cought in the heavy rain ,he was wet.另一种形式（ ）in heavy rain,he was wed.为什么那么填A caught B catching