过去完成进行时（had been doing)的被动语态是什么？ 过去完成进行时和过去完成时有什么区别？请举例说明

Question

我错了，其实没有被动语态

Answer 1

被动---had been being done
过去完成时：过去某段时间完成的一个动作，一般用had +过去式
以过去某个时间为标准，在此以前发生的动作或行为，
或在过去某动作之前完成的行为，即“过去的过去
如：
As soon as we got to the station, the train had left
当我们到达车站是，火车已经开走了
（我们到达车站时那个动作都已经是过去了，火车开走的时候在我们到达的时候就已经发生了，所以要用过去的过去，即过去完成时）

过去完成进行时： 过去一段时间内持续进行的一个动作，had+been+doing
过去一段时间内一直在做的事情,现在已经终止了
如：
I had been learning English three years ago.
三年前我一直在学英语(但现在没学了);

Answer 2

1 had been being done
2 He had finished his homework when his mother came back. 妈妈回家时已经做完作业了
He had been finishing his homework when his mother came back. 还没做完，一直在做

Answer 3

被动语态
一、各种时态的被动语态举例
一般地讲，被动语态可用于英语的各种时态。为了能准确地运用被动语态，重点是要掌握be动词的各种时态变化。各种时态的被动语态举例如下：
1、一般现在时的被动语态. am / is / are + 动词的过去分词
Our classroom is cleaned every day.
This car is made in China.
2、一般过去式的被动语态: was / were + 动词的过去分词
His desk was cleaned just now.
The station was built in 1928.
3、现在进行时的被动语态: am / is / are + being + 动词的过去分词
A new factory is being built in our city now.
Some trees are being cut down in the park.
4、过去进行时的被动语态: was / were + being + 动词的过去分词
A new factory was being built in our city at that time.
Some babies were being looked after by Miss Chen last year.
5、一般将来时的被动语态:
(A) will / shall + be + 动词的过去分词
(B) am / is / are + going to be +动词的过去分词.
Some new factories will be built in our city this year.
Your watch is going to be mended in an hour.
6、过去将来时的被动语态:
(A)would / should + be + 动词的过去分词
(B)was / were +going to be + 动词的过去分词.
She said that some new factories would be built soon in our city.
He thought that your watch was going to be mended after an hour.
7、现在完成时的被动语态:have / has + been + 动词的过去分词
Some new factories have been built in the city since last year.
Your watch has been mended already.
8、过去完成时的被动语态:had + been + 动词的过去分词
He said that some new factories had been built in the city.
I didn’t know that my watch had been mended .
9、含情态动词的被动式：can/may/must + be + done
He can not be found. / I must be paid for this.
二、如何将主动语态变成被动语态
1、从句子意义上说，就是重新找出“什么事物”是“被完成”的。
例1.
主动语态：人们说英语。People speak English in many countries.
被动语态：英语被说。　English is spoken in many countries..
例2.
主动语态：我们造这座桥。We built this bridge last year.
被动语态：这座桥被建造。This bridge was built last year.
2、从语法的角度说，把原句的宾语改成主语。
例1.
主动语态：小刘邀请你(宾语) Xiao Liu has invited you to a lunch party.
被动语态：你(宾语)被邀请。 You has been invited to a lunch party by Xiao Wang.
例2.
主动语态：你不准带走杂志(宾语) You must not take these magazines out of the reading-room.
被动语态：杂志(宾语)不准被带走.These magazines must not be taken out of the reading room.
例3.
主动语态：他们授给他(宾语)一枚奖章(宾语).They gave him a medal for his wonderful work.
被动语态：他(宾语)被授予一枚奖章. He was given a medal for his wonderful work.
被动语态：一枚奖章(宾语)被授给了他.A medal was given to him for his wonderful work.