今天有大雨,英文可以说是 "It's raining heavily today"。

这句话的来源是英语中常用的表达方式,"it's raining" 表示正在下雨,加上副词 "heavily" 表示下得很大。

下面是一些英文例句及其中文翻译:

"I can't go out, it's raining cats and dogs." (我不能出门,外面大雨倾盆。)
"I forgot my umbrella at home, and now I'm getting soaked in the rain." (我把伞忘在家里了,现在我被雨水淋湿了。)
"The forecast says it's going to rain all day." (天气预报说今天一整天都会下雨。)