将要下雨了英语怎么说

在英语中，“将要下雨”的意思可以用"it's going to rain"表示。例如：
I think it's going to rain. Let's take an umbrella with us.
The weather forecast said that it's going to rain this afternoon.
I hope it's not going to rain tomorrow. We have a picnic planned.
这句话的来源源于英语中的动词“to go”，它有“去”的意思，在这里可以理解为“正在发生”。例如：
The train is going to leave in five minutes.
She is going to have a baby next month.
The party is going to be a lot of fun.
因此，“it's going to rain”的意思就是“雨将要下”。