被动语态(passive voice)是动词的一种形式，用以说明主语与谓语动词之间的关系。英语的语态共有两种：主动语态和被动语态。主动语态表示主语是动作的执行者，被动语态表示主语是动作的承受者。被动语态是动词的一种特殊形式，一般来说，只有需要动作对象的及物动词才有被动语态。
1、主动：We have studied English for 3 years at the spare-time school.
被动：English has been studied by us for 3 years at the spare-time school.
我们已经在学校里学了三年英语了。
2、主动：They had produced 100 tractors by the end of last year.
被动：100 tractors had been produced by the end of last year.
到去年年底他们已生产出一百台拖拉机。
3、主动：They have set up a power station in their home town.
被动：A power station has been set up in their home town.
他们的家乡建立了一座发电站。
4、主动：They have warned us to be careful of rats.
被动：We have been warned to be careful of rats by them.
他们已提醒我们要注意老鼠。
5、主动：People have piled plastic bags full of rubbish in streets.
被动： Plastic bags full of rubbish have been piled in streets.
人们把装满垃圾的塑料袋子堆放在街上。
6、主动：We have used nuclear energy to produce electricity.
被动：Nuclear energy has been used to produce electricity by us.
核能被我们用来发电。
7、主动：No one has ever beaten him at tennis.
被动：He has never been beaten at tennis.
就网球来说还没有人是他的对手。
8、主动：Somebody had cleaned my shoes.
被动：My shoes had been cleaned by somebody.
有人已把我的鞋子擦了。
9、主动：When I returned I found that they had towed (tow) my car away, I asked why they had done this and they told me that it was because I had parked it under a "No Parking Sign".
被动：My car had been towed away. I asked why this had been done and told that...it had been parked under a "No Parking Sign".
当我回来时，发现我的车被拖走了。我问他们为什么这么干。他们告诉我说因为我把车停在“禁止停车”的区域。
10、主动：They had build three ships by last December.
被动：By last December three ships had been built by them.
到去年年底他们已建造了三艘船。
