2021_2022学年新教材高中英语UNIT3THEINTERNET突破语法大冲关学案含解析新人教版必修第二册.doc
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1、UNIT 3 THE INTERNET现在完成时的被动语态观察例句1Much has been written about the Great Wall.2Many people have been helped by the club.3Jans life has been greatly improved by the Internet.4Look at the way your face has been washed.5Today I thought Id answer a question that has been asked many timeshow do you stay s
2、afe online and avoid bad experiences on the Internet?归纳句法一、现在完成时的被动语态的构成have/hasbeen过去分词二、现在完成时的被动语态的常用句式肯定式主语have/has been done.否定式主语have/has not been done.一般疑问式Have/Has主语been done.?特殊疑问式疑问词have/has主语been done.?The city has been swept through by heat wave recently.最近热浪横扫了这座城市。His work has not been
3、finished.他的工作尚未完成。Have the new booking systems for tickets been used?新的订票系统已在使用中了吗?How long has the battery not been changed?电池多久没有更换了?即学即练1句型转换The children have already been told the good news.The children havent been told the good news yet.(改为否定句)Have the children been told the good news yet?(改为一般
4、疑问句)Who has been told the good news yet?(对the children进行提问)三、现在完成时的被动语态的用法1表示被动的动作在说话之前已经完成,强调过去的动作对现在造成的影响或产生的结果。通常与already,yet,never,recently等副词及时间状语so far,by now,up till now,before.等连用。The work has already been finished.工作已完成了。(结果是现在不用做这项工作了)The doctor hasnt been sent for yet.还没有派人去请医生。(现在应派人去请医生
5、)2表示一个被动的动作或状态开始于过去,持续到现在,并有可能持续下去。常与for或since引导的时间状语连用,或用于How long.?句型中。The machine has been repaired for two hours.这台机器已经修了两个小时了。(可能还会继续被修)3用在时间或条件等状语从句中,表示将来某时已完成的动作,即用现在完成时的被动语态代替将来完成时的被动语态。You can go home as soon as your task has been finished.你的任务一完成就可以回家。即学即练2单句语法填空In the last few years,thous
6、ands of films have been produced(produce) all over the world.Though we dont know what was discussed,yet we can feel the topic has been changed(change)四、使用现在完成时的被动语态要注意的事项1与一般过去时的被动语态的区别一般过去时的被动语态所表示的动作或状态与现在的情况没有联系,而现在完成时的被动语态则强调与现在的情况有联系。The park was opened to the public last year.去年这家公园向公众开放。(说明动作
7、发生在过去)The park has been opened to the public.这家公园已向公众开放。(说明动作发生在过去,但对现在有影响,即现在公园已经开放了)2非延续性动词如borrow,finish,begin,start,buy,marry,open,join等构成的现在完成时的被动语态不能与表示一段时间的状语连用。若要表达相应的意思,则要改换动词或时态。The work was finished two weeks ago.这项工作在两周前已经完成。The work has been finished.这项工作已经完成。3动词短语动词短语是一个不可分割的整体,在被动语态中要
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