It is raining heavily but I don't have an umbrella with me.

下着大雨，但我没有带伞。

It is raining heavily, but none of the students are late for school.

雨下得很大，但是没有人迟到。

It is raining heavily; why don't you turn on the windshield wipers?

下这么大的雨，你怎么不打开雨刮器呢？