求懂英语的解释一下这些分别是什么时态
1.{is
be {am + p.p（过去分词）
{are
2.
be {was +p.p
{were
3.have/has been + p.p
4.will be + p.p
be going to be + p.p
5.must/may/need/can/should/ + be + p.p
6.{is
be {am + being + p.p
{are