高中英语-英语被动语态讲解(共24张PPT)

英语被动语态讲解 一、被动语态的构成形式 二、被动语态的各种句型 三、 It is said that+从句及其他类似句型 四、谓语动词的主动形式表示被动意义 五、非谓语动词的主动形式表被动意义 六、介词in, on, under等+名词构成介词短语表被动意义 七、被动语态与系表结构的区别 一、被动语态的构成形式 1. 被动语态的基本时态变化 　　被动语态通常为十种时态的被动形式, 被动语态由be＋过去分词构成，be随时态的变化而变化。以do为例，各种时态的被动语态形式为： 1) am/is/are +done (过去分词) 一般现在时 　　例Visitors are requested not to touch the exhibits. 2） has /have been done 现在完成时 　　例All the preparations for the task have been completed, and we're ready to start. 3） am/is /are being done 现在进行时 　　例A new cinema is being built here 一、被动语态的构成形式 4） was/were done 一般过去时 　　I was given ten minutes to decide whether I should reject the offer. 5） had been done 过去完成时 　 By the end of last year, another new gymnasium had been completed in Beijing. 6） was/were being done 过去进行时 　　A meeting was being held when I was there. 7） shall/will be done/ be going to be done/ be about to be done/ be to be to done一般将来时 　　Hundreds of jobs will be lost if the factory closes. 一、被动语态的构成形式 8） should/would be done/ was\were going