Unit 3 The Internet Discovering Useful Structures 现在完成时的被动语态（ppt课件）-2023新人教版（2019）《高中英语》必修第二册.pptx

1、Unit 3The present perfect passive voice现在完成时的被动语态现在完成时的被动语态一、The Present Perfect Tense 现在完成时结构：结构：has/have+done(V-过去分词过去分词)助动词助动词,无意义无意义表示表示说话时说话时已经完成已经完成的的动作动作,而且这个而且这个动作的结果动作的结果对现在仍有影响对现在仍有影响;表示表示动作发生在过去动作发生在过去,但一直持续到现在但一直持续到现在,并且有可能继续持续下并且有可能继续持续下去去。二、The present perfect passive voice 现在完成时的被动语态现

2、在完成时现在完成时1.1.定定义义 表示表示说话时说话时已经完成的被动性已经完成的被动性的的动作或结果动作或结果,主语是动作的承受者主语是动作的承受者。被动语态被动语态+现在完成时的被动语态现在完成时的被动语态has/have donebe donehas/have been done+肯定式：肯定式：否定式：否定式：一般疑问句：一般疑问句：特殊疑问句：特殊疑问句：2 2.结结构构 主语主语+has/have+been+done主语主语+has/have+not+been+done.Has/Have+主语主语+been+done.？特殊疑问词特殊疑问词+has/have+主语主语+been+d

3、one.？The children have already been told the good news.Have the children been told the good news yet?Who has been told the good news yet?否定句：否定句：The children have not/havent been told the good news yet.一般疑问句：一般疑问句：特殊疑问句特殊疑问句（对划线部分提问）：（对划线部分提问）：The machine has already been repaired.Toms novel has not

4、 been punished yet.3.3.用用法法 (1)(1)表示动作已完成表示动作已完成,强调过去的动作对现在造成的影响或结果强调过去的动作对现在造成的影响或结果,主主语和谓语之间为被动关系语和谓语之间为被动关系,通常与通常与already,yet,just,never,recently 等等副词连用副词连用,放在放在has/have的后面的后面,有时也可放在句末。有时也可放在句末。The problem has been discussed for nearly two hours.How long has the film been shown?(2)(2)表示一个表示一个被动被动

5、的动作或状态的动作或状态开始于过去开始于过去,持续到现在持续到现在,并可能持并可能持续下去续下去,常常与与for或或since引导的时间状语连用引导的时间状语连用,或用于或用于 “How long.？”句型中。句型中。You shouldnt leave school before your homework has been finished.(3)(3)用在用在时间或条件状语从句时间或条件状语从句中中,表示表示将来某时已完成的动作将来某时已完成的动作,即即用现在完成时的被动语态用现在完成时的被动语态替代将来完成时的被动语态替代将来完成时的被动语态。already 已经已经 yet 已经已经

6、recently/lately 最近最近 since then 从那时起从那时起ever since 自那以来自那以来 ever 曾经曾经so far 迄今为止迄今为止 by now 到现在为止到现在为止for a long time 很长一段时间很长一段时间in recent years 在最近几年里在最近几年里in/during/over the past/last years 在过去的几年里在过去的几年里常与常与现在完成时现在完成时连用的连用的时间状语时间状语有：有：(1)(1)现在完成时现在完成时的被动语态、的被动语态、现在进行时现在进行时的被动语态及的被动语态及一般过去时一般过去时的

7、被动语态的的被动语态的区别区别：4 4.注注意意 The machine has been repaired.(说明动作发生在过去说明动作发生在过去,对现在有影响对现在有影响)The machine is being repaired now.(说明动作正在进行说明动作正在进行)The machine was repaired yesterday.(只说明动作发生在过去只说明动作发生在过去)The project has been started for three months.（F）The project has been on for three months.（T）(2)(2)非延续性

8、动词非延续性动词,如如borrow,finish,begin,start,buy,marry,open,join等构成的现在完成时的被动语态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不能与表示一段时间的状语连用。若。若要表达相应的意思要表达相应的意思,则要改换动词或时态。则要改换动词或时态。1.Paper money _(use)for over a thousand years.2._ the letter _(give)to Mr.Black?No.Its still on the desk.3.Great changes _(take)place in my hometow

9、n and a lot of factories _(set)up.has been usedHasbeen givenhave takenhave been setExercise4.How long _(employ)at this job?Since 1999.5.When and where to go for the on-salary holiday _(not,decide)yet.6.I like these English songs and they _(teach)many times on the radio.7.All the preparations for the

10、 task _(complete),and were ready to start.have been taughthave been completed has not been decidedhave you been employed Change the sentences into the present perfect passive voice.Theyve built a kind of new PC with more functions.A kind of new PC has been built with more functions.EXAMPLEI have dow

11、nloaded the software to help my phone battery last longer.Someone has lost an identity card.The software has been downloaded to help my phone battery last longer.An identity card has been lost.Have you confirmed the Wi-Fi password?Have you pressed the button yet to copy the file?Has anyone made a comment about the online database?Has the Wi-Fi password been confirmed?Has the button been pressed yet to copy the file?Has a/any comment been made about the online database?THANKS