Unit 6When was it invented ?Section A Reading 被动语态 (Passive Voice)结构: be + V-p.p.am / are / is +动词的过去分词was / were +动词的过去分词 一般现在时的被动语态:一般过去时的被动语态: Many people speak English. (主动语态)English is spoken by many peopleThe naughty boy broke the window yesterday. (主动语态)The window was broken ( by the naughty boy) yesterday. We bought some books. 主动句与被动句之间的转换Some books were bought ( by us ) 主语 谓语动词主动语态的过去式 宾语主语 谓语动词被动语态的过去分词 介词+ 宾语主动句变为被动句所遵循的4个步骤：1. 把原主动句中的宾语变为被动句的主语。2. 把动词变为被动形式即be+过去分词，并注意其人称和数随主语的变化，而动词的时态则保持不变。3. 原主动句的主语如需要则放在by后面以它 的宾格形式出现（注代词的宾格），如不需要则可省略。4. 其它的成分（定语、状语）不变。被动语态的几种句型 肯定句 主语 + be + 过去分词 + (by…)A sweet song was sung by her on the stage.2 否定句 主语 + be + not +过去分词 + (by…)3 一般疑问句 Be + 主语 +过去分词 + (by…)? A sweet song wasn’t sung by her on the stage.Was a sweet song sung by her on the stage?4 特殊疑问句 疑问词 + be + 主语 +过去分词 + (by…)?Where was a sweet song sung by her? 被动语态的运用:（1） 不知道谁是动作的执行者或没 有必要知道谁是动作的执行者时。The house is quite old. It was built in 1950. 这座房子太旧了，它是1950年建的。 When will the road be opened to traffic? 这条路什么时候通车? |
