Unit3TheInternetDiscoveringUsefulStructures现在完成时被动语态课件高中英语人教版

Discoveringusefulstructures---presentperfectpassivevoice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Winter

has

already

come

.冬天已经来临。present(now)现在future未来past过去过去的动作一直持续到现在（动作未完成）过去的动作对现在产生影响（动作已完成）ThePresentPerfectTense现在完成时态二、现在完成时的用法(1)表示到现在为止已经完成或刚刚完成的动作。Eg：①Nowwehaveplantedallthetrees.

现在我们已经种下了所有的树。②

Hehasjustcomeback.

他刚刚回来。③

Theyhavebuiltmanybuildingsinthiscity.

他们在这个城市建造了许多建筑。Someonehasbrokenthewindow.

(窗户现在是坏的)Ihavealreadylostthekey.

(我现在没有钥匙)Ihaven’treadthatbookyet.

(不了解书的内容)Ihavejustcleanedmyhands.

(手是干净的)二、现在完成时的用法(2)表示过去发生的动作,强调结果或对现在的影响。常与already,yet

(到现在还没有),just

(刚刚),

ever等词连用.already:常用于肯定句中

yet:常用于否定句,疑问句尾常与现在完成时连用的时间状语有：already

已经

yet

已经recently/lately

最近

sincethen

从那时起eversince

自那以来

ever

曾经sofar/uptillnow

迄今为止

bynow

到现在为止foralongtime

很长一段时间inrecentyears

在最近几年里in/during/overthepast/lastyears

在过去的几年里ShehaslearnedEnglishfor5years.她学英语有五年了。HehaslivedinBeijingsince

（自从）5yearsago.他五年前就住在北京了。二、现在完成时的用法(3)表示从过去开始并持续到现在的动作或状态，常与包括现在在内的一段时间的状语连用。for＋时间段（一段时间）观察下列句子，找出它们的共同之处。MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.People’sliveshavebeenchangedbyonlinecommunitiesandsocialnetworks.Manypeoplehavebeenhelpedbytheclub.Jan’slifehasbeengreatlychangedbytheInternet.Howhasourlifebeenchanged?Canwerewritethesentencelikethis?我们能将句子这样进行改写吗？Perceiving&understanding理解与感知Canwerewritethesentencelikethis?MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.很多关于万维网奇妙之处的（文章）已经被写了下来。人们已经写了很多关于万维网奇妙之处的文章。Moreexamples…让我们观察更多例句~Perceiving&understanding理解与感知Observetheredwordsandthink.1.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.2.People’sliveshavebeenchangedbyonlinecommunities.3.Manypeoplehavebeenhelpedbytheclub.4.Jan’slifehasbeengreatlychangedbytheInternet.1.PeoplehavewrittenmuchaboutthewondersofWorldWideWeb.2.Onlinecommunitieshavechangedpeople’slives.3.Theclubhashelpedmanypeople.4.TheInternethaschangedJan’slife.三、现在完成时的被动语态1.现在完成时的结构:主语+have/has+

V-过去分词（done）2.现在完成时的被动语态结构就是：主语

+

have/has

+

been

+

V-过去分词Actually,newchangeshavetakenplaceinourschoolandcounty.Newteachingbuildingshavebeenbuiltinourschool.Agym

hasbeenbuiltinourschool.Thetrack

andfieldhasbeenbuiltinourschool.Anewroad

hasbeenbuilt

nearourschool.Arailwaystationhasbeenbuiltinourcounty（县）.Let’sobservethesentencestogether.1.Newteachingbuildingshavebeenbuiltinourschool.2.Agymhasbeenbuiltinourschool.3.Thetrackandfieldhasbeenbuiltinourschool.4.Anewroadhasbeenbuiltnearourschool.5.Arailwaystationhasbeenbuiltinourcounty（县）.现在完成时被动语态的定义：同现在完成时一样:表示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。被动语态:“be+过去分词”表示“被动”肯定式：主语+

have/has+

been

+

done(V-过去分词)否定式：主语+

have/has+

not

+

been

+

done...

一般疑问句：Have/Has

+主语+

been

+

done...？特殊疑问句：疑问词+

have/has

+主语+

been

+

done...？现在完成时的被动语态的结构Manystudentshave

alreadybeenaffectedbythevirus.许多学生已经受到病毒的影响Havemanystudentsbeen

affectedbythevirusyet?Who

havebeenaffectedbythevirusyet?①否定句：Manystudentshave

notbeenaffectedbythevirusyet.②一般疑问句：③特殊疑问句（对划线部分提问）：1.Papermoney____________(use)foroverathousandyears.

2.—_____theletter__________(give)toMr.

Black?—No.It’sstillonthedesk.3.Greatchanges_________

__(takeplace)inmyhometownandalotoffactories____________(set)up.hasbeenusedHasbeengivenhavetakenplacehavebeensetCompletethesentences.takeplace是不及物动词短语，没有被动形式。

Completethesentences.4.Overthepastfouryears,morethan$10million________________(spend)carryingouttheproject.5.Manybuildingsinthiscity__________________(not,build)yet.6.IliketheseEnglishsongsandthey______________(teach)manytimesontheradio.7.Allthepreparationsforthetask__________________(complete),andwe’rereadytostart.8.Nowallthetrees______________(plant)bystudents.havebeentaughthavebeencompletedhavenotbeenbuilthavebeenspenthavebeenplantedHaveatry(Bookp.30(2))Changethesentencesintothepresentperfectpassivevoice.ExampleTheyhavebuiltakindofnewPCwithmorefunctions.→AkindofnewPChasbeenbuiltwithmorefunctions.1.Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.2.Someonehaslostanidentitycard.3.HaveyouconfirmedtheWi-Fipassword?4.Haveyoupressedthebuttonyettocopythefile?5.Hasanyonemadeacommentabouttheonlinedatabase?1.Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.2.Someonehaslostanidentitycard.3.HaveyouconfirmedtheWi-Fipassword?4.Haveyoupressedthebuttonyettocopythefile?5.Hasanyonemade