一、语法图解
二、语法突破
1．定义
过去完成时的被动语态表示过去某个时刻正在进行或者发生的被动动作。谓语动词的主语是动作的承受者而不是发出者。
The goods were being uploaded when we arrived at the airport.
当我们到达机场时，货物正在被装载。
2．构成
(1)肯定句：主语＋was/were＋being＋及物动词的过去分词(＋by＋动作的执行者)
Another bridge was being built over the Changjiang River then.
那时长江上正在建造另一座大桥。
(2)否定句：主语＋was/were＋not＋being＋及物动词的过去分词(＋by＋动作的执行者)
The TV set was not being fixed by him this time yesterday.
昨天这个时候他没有修理电视机。
(3)一般疑问句：Was/Were＋主语＋being＋及物动词的过去分词(＋by＋动作的执行者)?
Was a new library being put up in their school just then?
他们学校当时正在建一座新图书馆吗？
(4)特殊疑问句：疑问词＋was/were＋主语＋being＋及物动词的过去分词(＋by＋动作的执行者)?
What was being done to the machine then?
那时正在对这台机器采取什么措施？
根据要求进行句型转换
①The boy's father was scolding him when his mother came back.
→The boy was being scolded by his father when his mother came back.(改为被动语态)
②His car was being repaired when I came in.
→His car was not being repaired when I came in.(改为否定句)
③The man was being questioned by the policeman at that time.
→ Who was being questioned by the policeman at that time? (对The man进行提问)
3．基本用法
(1)过去进行时的被动语态强调的是在过去的某个时间点正在进行的被动动作。常与过去进行时被动语态连用的时间状语有：then，at this time yesterday，at that moment，yesterday afternoon，in 1998及when，the moment等时间状语或引导的时间状语从句。
Trees were being planted by them at this time yesterday.
昨天这个时候他们正在植树。
The president was being interviewed by the presenter the moment I entered the office.
当我走进办公室的那一刻，总统正在接受主持人的采访。
(2)过去进行时的被动语态与一般过去时的被动语态的区别：过去进行时的被动语态强调动作发生的过程，一般过去时的被动语态强调动作的结果。
Several patients were being treated in the local hospital then.(表示被动进行的动作)
当时有几个病人正在当地医院接受治疗。
Several patients were treated in the local hospital then.(表示过去发生的动作)
当时有几个病人在当地医院接受治疗。
