同学你好，该知识点来自沪江网校《新概念英语第二册【天猫专享】》的课程，想要更系统的学习，欢迎进入课程学习。不仅可以和更多的同学一起学习，而且还有老师、助教随时的学习指导和知识点解答哦。

同学好：
被动语态相当于汉语里的“被”字句，即表示“... 被...”。
被动语态的核心结构是”be+过去分词“，其中的be会随着时态有变化。
常用的时态的被动语态结构如下——
1 一般现在时（am/ is/ are +done）  
English is spoken by lots of people in the world. 世界上的许多人都说英语。  
Class meeting is held every Thursday. 每周四都举行班会。
The classroom is cleaned by the students every day. 学生们每天都打扫教室。  

2 一般过去时(was/ were +done)  
The cup was broken by the boy. 杯子被那个男孩打碎了。  
He was saved at last. 他最终获救了。  
My bike was stolen. 我的自行车被偷了。    

3 一般将来时(will/ shall be +done)
A speech will be given this afternoon. 今天下午有一个演讲。  
A new road will be built next year. 明年要修一条新马路。  

4 过去将来时 (would be +done)
I thought thousands of people would be helped. 我认为将有数千人得到帮助。  

6 现在进行时 (am/ is/ are being +done)
The problem is being discussed now. 问题正在被讨论。  
A bus is being pushed by the passengers. 路人正在推一辆公共汽车。  

7 过去进行时 (was/were being +done)
The machine was being repaired at this time yesterday. 昨天这时，机器正在被修理。

8 现在完成时(have/ has been + done)  
Two hundred trees have been planted by now. 到现在为止，已经种了二百棵树了。  
The book has been read many times by me. 这本书已经被我读了许多遍了。  

9 过去完成时(had been+done)  
They said they had been invited to the party. 他们说已经被邀请参加晚会了。  
She found the house had been destroyed by the storm. 她发现房子已经被暴风雨摧毁。  
He had been tortured by the illness for many years before he died.   他在去世前已经被疾病折磨很多年了。

10 含有情态动词的被动语态 (情态动词+be+过去分词)
Tables can be made of stone.桌子可由石头制造。  
Tables could be made of stone at that time. 那时桌子可由石头制造。（一般过去时）  
Can tables be made of stone? 桌子能用石头制造吗？（疑问句）

祝学习愉快！