UNIT3DISCOVERINGUSEFULSTRUCTURES现在完成时被动语态课件高中英语人教版必修第二册

Unit3TheInternetDiscoveringUsefulStructures现在完成时被动语态

TolearnthepresentperfectpassivevoiceTousethepresentperfectpassivevoicetodosomeexercisesandtalkaboutsomethinghasbeendoneToreadapoemandlearntowriteyourownpoem现在完成时用法：1.表示发生在过去且已经完成的动作对现在造成的影响或结果

2.表示动作从过去延续到现在并有可能继续延续下去基本结构：主语+have/has+done+其他Thecountrysidehaschangedalotinthepastfewyears.Wehaveseenthatfilmbefore.之前我们已经看过那部电影了。现在过去将来﹏Jan’slifehasbeengreatlyimprovedbytheInternet.TheInternethasgreatlyimprovedJan’slife.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.现在完成时与现在完成时被动语态的动词形式找出下面句子的谓语结构，哪些是主动？哪些是被动？Jan’slifehasbeengreatlyimprovedbytheInternet.TheInternethasgreatlyimprovedJan’slife.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.被动主动主动被动

现在完成时谓语结构

主动被动have/hasdonehave/hasbeendone......已经被......主语

+

have/has

+V-过去分词(done)助动词,无意义

一、现在完成时的结构一、用法：1、表示发生在过去,到现在已经完成的动作对现在的影响。表示动作从过去延续到现在并有可能继续延续下去2、动词和被修饰主语构成被动关系。二、构成：肯定式：have/hasbeendone否定式：have/hasnotbeendone一般疑问句：Have/Has+主语+beendone?特殊疑问句：疑问词+have/has+主语+beendone?三、解题步骤

1.根据句意确定时态2.确定主被动

3.定谓have/has现在完成时的被动语态现在完成时的被动语态有两种情况：1)表过去开始的被动动作一直持续到现在，常连用的时间状语有：for+段时间，since+时间状语(从句)，thesedays,sofar,uptonow,inthelast/pastfewyears等。egThisclasshavebeentaughtbyMr.Brownfortwoyears.HisChinesehasbeenimprovedalotsincehecametoChina.Rowling’snovelshavebeentranslatedintomanyforeignlanguagessofar.2)表某被动动作对现在造成的影响或结果，常与already,yet,just,ever,never,recently等连用。egThebikehasnotbeenrepairedyet.IhavealreadybeenintroducedtoMr.Smith.

注意：有些动词没有被动语态,如不及物动词happen,takeplace,breakout等。【考点精讲】

现在完成时1.常与以下时间状语连用：recently,yet,already,just,before,lately,since+时间状语（从句）”,“for+时间段”,(ever)since,thesedays,before,sofar,inthelast/pastfewyears,uptonow,tillnow，by+现在时间…等。*Ihavejust/alreayturnedoffthelight.*Theyhavebeengoodfriendssincetheymetatameeting.*Shehasworkedintheschoolfortenyears.2.在条件、时间、让步状语从句中,表示将来某时已完成的动作。*IshallposttheletterassoonasIhavewrittenit.3.下列句型中常用现在完成时:①Itis(hasbeen)+一段时间+since从句(从句用一般过去时)②This/Itisthefirst(second...)time+that从句(从句用现在完成时)

3.注意事项①由finish,buy,start,begin,post,return,borrow,marry,open等词构成的现在完成时的被动语态,不能与表示段时间的状语，如forfourdays,howlong等连用，而要改换动词或者是时态。判断正误:

*Howlonghasthisbookbeenbought?()*Howlongagowasthisbookbought?()②短语动词不能分割，而且不能省略短语动词中的介词或副词。判断正误:

*Thepatienthasbeentakengoodcare.()*Thepatienthasbeentakengoodcareof.()XVXV

③并不是所有的动词都有被动语态。如happen,occur,takeplace,breakout,belongto,cost,last等不及物动词或词组，就没有被动语态。判断正误:*Someofthebestconversationshaveeverhappenedaroundthedinnertable.()*Someofthebestconversationshappenedaroundthedinnertable.()④双宾语动词变被动语态可将其中的一个宾语变为主语,另一个保留不动。主动:Ihavegivenhimthekey.被动:He

hasbeengiven

thekey.被动:Thekey

hasbeengiven

(to)him.VXWhile-classPracticeWhile-classThesoftwarehasbeendownloadedtohelpmyphonebatterylastlonger.Anidentitycardhasbeenlost.HastheWi-Fipasswordbeenconfirmed?Hasthebuttonbeenpressedyettocopythefile?

Canyoumakemoresentences,using“have/hasbeendone”?PracticeI

thebuildings,destroy,earthquakeThebuildingshavebeendestroyedbytheearthquake.Lookatthepictures,firstlistsomekeywords,thenmakeupsentencesusingthepresentperfectpassivevoice.machinereplace一.单句语法填空1．Theirnewhouse_______________(decorate)fortwomonthsandtheywillsettleinitinthenearfuture.2．Theirnewcars_________________(advertise)ontheInternetforalongtime.3．Alltheathletes_______________(select)frommillionsofpeoplealloverthecountryinthepasttwomonths.4．Greatchanges___________(take)placeinmyhometowninthepasttenyears.5.She_________(return)thisbooktothelibraryalready.hasbeendecoratedhavebeenadvertisedhavebeenselectedhavetakenhasreturned二、单选题(

)1.Despitethepreviousroundsoftalks，noagreement________sofarbythetwosides.A．hasbeenreached B．wasreachedC．willreach D．willhavereached(

)2.ItisthemostinstructivelecturethatI________sinceIcametothisschool.A．attended

B．havebeenattendedC．amattending

D．haveattended(

)3.Inthelastfewyearsthousandsoffilms________allovertheword.A．haveproduced

B．havebeenproducedC．areproducing

D．arebeingproducedADBSUMMMARY现在完成时的被动语态含义结构表示过去发生的被动动作现在已经完

成或仍将持续,强调对现在的