被动语态讲解如下：
一、动词语态
动词语态包括：主动语态 和 被动语态
主动语态：表示 “主语做…”; 主语是动作执行者； 
被动语态：表示“主语被…”;  主语是动作承受者；
The fisherman caught the fish. 
渔夫抓住了那条鱼。
[渔夫抓…，表示主语做….，主动语态]
The fish was caught by the fisherman. 那条鱼被渔夫抓住了。
[鱼被抓, 表示主语被…, 被动语态]

二、被动语态的构成
主语 + be动词+ 动词过去分词
The room is cleaned by Amy.
房间被Amy打扫。
The car was driven by an old man.
这辆汽车被一位老人开着。


一般现在时：主语 + am/is/are + 过去分词
I am called Jack.
我被叫做杰克。
He is called Jack.
他被叫做杰克。
They are made in China.
他们产于中国。
[在中国被生产]

一般过去时：主语+ was/were +过去分词
I was taken to a park.
我被带到一个公园。
They were taken to a park.
他们被带到一个公园。

一般将来时：主语+ will be + 过去分词
He will be taken to a park.
他将被带到一个公园。
They will be taken to a park.
他们将被带到一个公园。

现在完成时：主语+have/has been +过去分词
He has been taken to a park.
他已经被带到了一个公园。
They have been taken to a park.
他们已经被带到了一个公园。

含情态动词：主语+情态动词+be+过去分词
[can、may、must、should等都是情态动词]
An exam may be given by our teacher today.
我们的老师今天可能会组织考试。  
[考试被组织]
Anna can be saved by the doctor.
Anna能够被医生拯救。
[医生能够救Anna]