用be动词的适当形式填空.3.It --- hot yesterday.Yes.But it --- cool today.

问题描述:

用be动词的适当形式填空.3.It --- hot yesterday.Yes.But it --- cool today.

  yesterday----昨天,说明是过去的情况,所以这里是was。
  today------今天,说的是现在的情况,所以是is。
  It -was- hot yesterday.
Yes.But it -is- cool today.

was is

was,is
昨天很热.——是的,但是今天很冷
前半句用了yesterday,要用过去时,后半句说到today,是现在的情况,用一般现在时

was
is