It ____ (rain)heavily now.It is much heavier than it ___ (be)yesterday.

问题描述:

It ____ (rain)heavily now.It is much heavier than it ___ (be)yesterday.
横线上填什么?为什么?整句的翻译

is raining
was
现在雨下得很大.比昨天大多了.为什么?now 决定了使用现在进行时。yesterday决定了使用过去时。