外面雪下的很大用英语怎么说

The phrase "It's snowing heavily outside" is used to describe a heavy snowfall. The phrase "it's snowing" is used to describe the general act of snow falling from the sky, while "heavily" is used as an adverb to describe the intensity of the snowfall.

"It's snowing heavily" is a simple sentence in English, Heavily is used as an adverb to describe the verb snowing. Heavily means to a great degree or in large amount.

Examples:

It's snowing heavily outside, I don't think I'll be able to make it to work today. (外面雪下的很大，我觉得我今天上不了班。)
The forecast says it's going to snow heavily tonight, so make sure to stock up on groceries. (天气预报说今晚会下大雪，所以一定要去买好食物。)