rain可数吗
1. rain意为“雨，下雨”通常用作不可数名词［U］,不必要加不定冠词。如：
Rain comes from the clouds. 雨从云中来。
We've had too much rain this summer. 今年夏季雨下得太多了。
It looks like rain. 好像要下雨了。
2. 表示“一场雨，一阵雨或某种类型的雨”时，用作可数名词［C］，这时用形容词修饰。如：
We are having a light rain. 我们这儿正下着小雨。
There was a heavy rain last night. 昨晚下了一场大雨。
The river rises after heavy rains. 大雨过后河水升高了。
