It is warmer today than it was yesterday.这句话去掉 it was It is warmer today than yesterday.这句话对吗?为什么?

问题描述:

It is warmer today than it was yesterday.
这句话去掉 it was It is warmer today than yesterday.这句话对吗?为什么?

不能去掉 去掉以后句子就不完整了 就没主语和谓语了