Unit 6When was it invented?Grammar FocusGrammar Focus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 people.The 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（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。主动句与被动句之间的转换 注意：过去式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? 二、特殊的被动语态1.含双宾语主动句变为被动语态的法(1)含有双宾语的主动句变成被动句时,通把指“人”的间接宾语变为主语, 指“物”的直接宾语保留不变。(2)如果要把指“物”的直接宾语变为主语,则在间接宾语前加to或for。 He lent me a bike.→ I wa |
