倾盆大雨：
The roads are flooded after a period of exceptionally torrential rain.
很多地方的道路都被淹了，通不了车。
As soon as I got outside, it started pouring.
我刚一出门就开始下大雨。
It was pouring with rain and I had forgotten my umbrella.
大雨瓢泼，但是我却忘记带伞了。
It's really coming down out there!
外面雨下得好大啊。

毛毛雨：
I like the rain, especially when it's drizzling.
我喜欢下雨，尤其是毛毛雨。
It's just spitting.
毛毛雨而已。

阵雨：
I had thought it was just a shower.
我以为这雨只下一阵的。
We got caught in a downpour.
我们被一场阵雨困住了。
I got soaked walking home just now.
刚刚走回家的时候淋得湿透的。
I got soaking wet.
我淋得湿透了。
It's been raining on and off all day.
这雨断断续续下了一天。