怎么判断英语动词有没有被动语态？学好动词英语就学好了一半

（基本助动词和及物动词的定义可参见往期文章学好动词英语就学好了一半：动词分类）

人称、数和时态的变化是通过be的变化表现出来的。各种时态的被动语态如下表：

去掉上表中表示被动的done，与下面时态表格对比。(参见往期文章9种时态=3时间 X 3状态)

两张表对比可以看出：

is=does, was=did, will be=will do,

is being=is doing, was being=was doing,

has been=has done, had been=had done.

为什么呢？因为be本质上也是动词，这就是前面所说的被动语态时态变化通过be的变化体现。

1) By the end of last month, the shop had been robbed at least three times.

到上月底，这家店已经被抢了至少三次了。

2) They will move into the building which is being built.

他们将搬进这栋正在被建造的楼。