被动语态的主要结构,被动语态的结构

网友回答

被动语态的构成：
被动语态的基本构成是“助动词be+及物动词的过去分词+(by)”。be 本身无词义，但有时态、人称和数的变化。by通常紧跟在被动句谓语动词之后，有时也可省。
现在：
1.一般现在时 am/is/are + done
2.现在进行时 am/is/are + being done
3.现在完成时 have/has + been done
过去：
1.一般过去时 was/were + done
2.过去进行时 was/were + being done
将来：
一般将来时 shall/will + be done
被动语态句式：
1.肯定：主语+be+过去分词+(by) The cars are made by them.
2.否定：主语+be+not+过去分词+(by) The cars are not made by them.
3.一般疑问句：Be+主语+过去分词+(by) Are the cars made by them?
4.含有情态动词的被动语态：主语+情态动词+(not)+be<原形>+过去分词+(by)
被动语态的用法：
1.强调动作的承受者 eg. Her bike is stolen.
2.淡化动作的执行者（没有说明、没必要指出、不知道） Eg. This coat is made of cotton. 这件大衣是棉制的。
3.动作的承受者是谈话的中心 eg. The picture was drawn by a boy under eight.

网友回答

1、动词一般现在时被动语态
　　am/is/are+过去分词
　　English is widely used at international meetings.英语在许多国际会议上广泛使用。
　　Computers are sold in the shop.那家商店出售电脑。
　　2、动词一般过去时被动语态
　　was+过去分词
　　were+过去分词
　　Many new buildings were put up lastyear.去年造了许多新楼房。
　　That song was sung by the singer at the party.聚会上那首歌被那位歌星唱过。
　　3、动词一般将来时被动语态
　　Shall/will/be going to be+过去分词
　　The play will be put on soon.这个戏不久将要上演。
　　The old house is going to pulled down soon.那幢旧房子很快就要被拆掉。
　　4、动词现在进行时被动语态
　　am/is/are+being+过去分词
　　A language lab is being built in our school.我们学校正在建造一个语言实验室。
　　The old bikes are being repaired now.旧自行车正在修理。
　　5、动词过去进行时被动语态
　　was+being+过去分词
　　were+being+过去分词
　　Mother said that my dirty clothes were being washed.母亲说我的脏衣服正在洗。
　　When I went to the watch shop,my watch was being fixed.我到手表店的时候，我的手表正在修。
　　6、动词现在完成时被动语态
　　have been+过去分词
　　has been+过去分词
　　The jobs have been finished.这些工作已被完成了。
　　That dirty place has been turned into a garden.那个脏地方已被变成一座花园。