1、-1-Unit 3 ComputersPeriod4 The Present Perfect Passive Voice（现在完成时的被动语态）-2-1.OvertimeIhavebeenchangedquitealot.2.,I havebeenused inofficesandhomessincethe1970s.3.IneverforgetanythingIhavebeentold!4.Sincethe1970s,manynewapplicationshavebeenfoundforme.1.5.I havealsobeenputintorobotsandusedtomakemobile
2、phonesasTask1.Presentation-3-II.Translation1.Twowindowshavebeenbroken2.Thecarhasnotbeenrepaired两个窗子被打破了。这辆汽车还没有被修好。-4-3Havethecarsbeenrepaired？No，theyhavent4Howlonghas herworkbeenfinished？这些汽车修好了吗？不，还没有。她的工作完成有多久了？-5-1.构成：The Present Perfect Passive Voice（现在完成时的被动语态）现在完成时表示过去发生的动作对现在造成影响。have/hasbee
3、ndone-6-2.现在完成时被动语态的各种句式：肯定式 have/hasbeendoneThedeskshavebeencleaned.这些桌子擦干净了。否定式 have/hasnotbeendoneThedeskshavenotbeencleaned.这些桌子还没有擦干净。-7-疑问式Have/Has主语beendone?Havethedesksbeencleaned?No，theyhavent.桌子擦干净了吗？不，还没有。特殊疑问式疑问词have/has主语beendone?Howlonghave thedesks beencleaned？桌子擦干净有多久了？-8-3.现在完成时被动语态
4、的主要用法1)当动词为短暂动词时，可与already或yet连用。例如：Theworkhasalreadybeenfinished.工作已完成了。Imsorry，butthelettershaventbeentypedyet.很抱歉，这些信件还没有被打印出来。-9-2)当动词为持续动词时，常与for或since引导的时间状语连用，或用于Howlong.？句型中。例如：Theplanhasbeendiscussed fornearly2hours.这项计划已被讨论了近两个小时了。-10-注意事项:1)现在完成时的被动语态的两个助动词，即have/has和been，缺一不可。2)只有及物动词才有被
5、动语态，不及物动词（词组）没有被动语态。3)副词的位置often,usually,always,never,hardly,seldom等副词置于have/has和been中间。如:误Suchamanhasbeenhardlybelieved.正Suchamanhashardlybeenbelieved.-12-1Overthepasttenyears，thistown_(hit)twicebyearthquakes.答案：hasbeenhit2Willthelecturebeheldat4oclockthisafternoon?No.It_(putoff)tilltomorrowafterno
6、on.答案：hasbeenputoffConsolidation.II.Choosethebestanswers.1.Allthepreparations_,andwerereadytostart.A.completedB.completeC.hadbeencompletedD.havebeendone-14-2.-Howlong_atthisjob?-Since1990.A.wereyouemployedB.haveyoubeenemployedC.hadyoubeenemployedD.willyoubeemployed3.Betty_injuredsincelastSaturday.A.
7、hasbeenB.wasC.isD.has4.-Didyoumoveintothenewhouse?-No.Therooms_yet.A.werebeingpaintedB.arepaintingC.havenotpaintedD.havenotbeenpainted-16-III.用所给词的适当形式填空。1.Theserooms_yet.(not,clean)2.Havethesecars_?(repair)3.Howmanynewwords_thisterm?(learn)havenotbeencleanedbeenrepairedhavebeenlearned-17-1.Recitethesentencesfromthetext.2.Revisethepresentperfectpassivevoiceafterclass,andtrytograspthedifferentformsandtheirusage.Homework
