UNIT3+Section+III+Discovering+Useful+Structures课件-【大单元教学】【知识精讲精研】高一英语 （人教版2019必修第二册）

人教版(2019)必修第二册Unit3InternetDiscoveringUsefulStructureLearningobjectives:Afterlearningthisclass,you’reableto...1.learntheformofPresentperfectpassivevoice.2.knowhowtousePresentperfectpassivevoiceinaspecificsituation.3.WriteablogtodiscusstheadvantagesanddisadvantagesofInternet.BYYUSHENTalkaboutsomethingthathasbeendoneReadthepairsofsentences.Underlineandcomparethedifferentverbforms.Jan’slifehasbeengreatlyimprovedbytheInternet.MuchhasbeenwrittenaboutthewondersoftheWorldWideWeb.TheInternethasgreatlyimprovedJan’slife.PeoplehavewrittenmuchaboutthewondersoftheWorldWideWeb.BYYUSHEN现在完成时activepassiveThestudentshavecleanedtheclassroom.Theclassroomhasbeencleaned.Youneedn’tcleanitnow.present(now)futurepast表示说话时已经完成的被动性的动作或结果，主语是动作的承受者。BYYUSHENHowdoweformthepresentperfectpassivevoice?Fillintheblank.have/hasbeen+v-ed主动语态变被动语态的原则“三变”原句主语by的宾语宾语主语

谓语由主动被动“三不变”原句意思不变原句时态不变原句主谓宾以外成分不变TalkaboutsomethingthathasbeendoneBYYUSHEN现在完成时的被动语态结构形式肯定形式：Hishomeworkhasbeenfinished.否定形式：Hishomeworkhasnotbeenfinished.一般疑问句:Hashishomeworkbeenfinishedyet?特殊疑问句：Howlonghashishomeworkbeenfinished?主语+have/hasbeendone...主语+have/hasnotbeendone...have/has+主语+beendone...?疑问词+have/has+主语+beendone...?BYYUSHEN现在完成时的被动语态的用法Theletter

(post)already.Manyhouses

(build)forthepoorsofar.hasbeenpostedhavebeenbuilt用法1:强调过去的动作对现在造成的影响或结果，主语和谓语之间为被动关系，通常与already,yet,just,never,recently等副词连用Activity1BYYUSHENThemachine

(repair)fortwohoursbutitstilldoesn’twork.Papermoney

(use)forover50years.用法2:表示一个被动的动作或状态开始于过去，持续到现在，并可能持续下去，常与for或since引导的时间状语连用，或用于“Howlong...?”句型中。hasbeenrepairedhasbeenusedBYYUSHENYoushouldn’tleaveschoolbeforeyourhomework________________(finish).Everyonewillfeelextremelydelightedifhe___________________(admit)toSouthChinaNormalUniversity.hasbeenadmittedhasbeenfinished用法3:用在时间或条件状语从句中，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。BYYUSHEN1.

现在完成时的被动语态、现在进行时的被动语态及一般过去时的被动语态的区别Themachinehasbeenrepaired.（说明动作发生在过去，对现在有影响，“现在修好了”）Themachineisbeingrepairednow.（说明动作正在进行）Themachinewasrepairedyesterday.（只说明动作发生在过去）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。例：工程已开始三个月了。

Theprojecthasbeenstartedforthreemonths.（F）

Theprojecthasbeenonforthreemonths.（T）注意BYYUSHEN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

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

在过去的几年里提示BYYUSHENActivity2Changethesentencesintothepresentperfectpassivevoice.

EXAMPLEThey’vebuiltakindofnewPCwithmorefunctions.→AkindofnewPChasbeenbuiltwithmorefunctions.1

Ihavedownloadedthesoftwaretohelpmyphonebatterylastlonger.→2

Someonehaslostanidentitycard.→3

HaveyouconfirmedtheWi-Fipassword?→4

Haveyoupressedthebuttonyettocopythefile?→5

Hasanyonemadeacommentabouttheonlinedatabase?→Thesoftwarehasbeendownloadedtohelpmyphonebatterylastlonger.Anidentitycardhasbeenlost.HastheWi-Fipasswordbeenconfirmed?Hasthebuttonbeenpressedyettocopythefile?Hasa/anycommentbeenmadeabouttheonlinedatabase?BYYUSHENActivity3Completethenoticewiththecorrectformsoftheverbsinbrackets.(WORKBOOKP75EX.4)NoticetoparentsDearParents,Wehopeyouwillwelcomethisnews.Almost100computers_______________（give)tousbyalocalcomputercompanysincetheendoflastyear.Adecision______________（make)tobeginacomputerteachingexperimentatourschool.Ourplan

__________________（support)withtechnicalequipmentandadvicewhich____________________（provide)bytheCityInformationTechnologyCentre.Everyteacher__________________（provide)withalaptopsincethebeginningofthisterm.Morerecently,mostofourcourses________________（teach)usingcomputers.We_________（help)inourteachingbyalotofinformationfromtheInternet.Also,anewcomputerroom________________(setup)inourschool.Wehopeyouwillbehappywiththisexcitingnewdevelopmentinourschool.havebeengivenhasbeenmadehasbeensupportedhasbeenprovidedhasbeenprovidedhavebeentaughthavebeenhelpedhasbeensetupBYYUSHENActivity4(AssessingyourprogressP34.2.)hasbeenupsidedownhavebeenconsideredhasbeencompletelychangedhasbeentakenoverhavebeenheavilyinfluencedAdvantages&DisadvantageBYYUSHENhelpfeellesslonelyandbored,joinanonlinegroupwhereshecouldtalkaboutherproblemsandgetsupportandadvicefromothersEntertainmentSocialcommunicationLearningSocialusestreammoviesandmusicchatwithmyfriendsanytime,anywhereuseasearchenginetodomyhomeworklookupinformationListeningandSpeakingapplyforworkandfindagreatjob,startasmallonlinecompany,startacharitywebsite,bikescanberentedbyusingonlineappsReadingandThinkingmakeafitnessplan,getdiscounts,addmoneytoherbankaccount,getinshape,keeptrackofthestepsstreamyourfavoriteTVprogrammeskeepyouupdatedonallyourfavouritetopicsListeningandTalkingsomecoursesarefreeandopentoanyone,havebeentaughtEnglishbyforeignteachersinothercountries,interactwitharobot,studentsworktogetheronprojectsE-learningBYYUSHENLatenightsspentmaintaininga24/7socialmediaprofilecouldbedetrimentaltopeople’shealth.Becometooinvestedinhavingtokeepupdatingandlikingpicturesandrespondingtopeopleonline.Seeingpostsofpeopleandtheirexcitingorsuccessfullivesmightputyourselfdown.Someonemightusetheinformationtostealyouridentity.Identitytheftisacommonandseriousproblem.Atrollpostscommentsorquestioninordertostiruptroubleonline.AcyberbullyusestheInternettobemeantoothers.Heorshemayalsopostembarrassingphotosandinformationaboutparticularpeople.VideoTimeReadingforWritingBYYUSHENActivity5你校将举办英语演讲比赛，以Besmartonlineusers为题写一篇发言稿参赛，内容包括：1.分析优势与不足；2.提出使用互联网的建议。BYYUSHENActivity5Group2Group1ThinkandShareThinkaboutmorepositiveornegativeinfluencesoftheInternetonlearning.Workingroupstopresentyouropinionwithsupportingdetails.BYYUSHENActivity5Thinkaboutthefollowingquestions:moreconvenient,strongerconnection,startanonlinecommunitystreammusicandvideo,goshopping,takeonlineclasses,chatwithfriends,checkonlineforums,readtheupdatedposts,lookupinformation.playonlinegamesYoudaoDictionary,BaiCiZhan,ChinaDaily,TED,DailyEnglishListeningadvertisingmessage,identitytheft,chargewithoutpermission,developsomeself-regulationskills,turnoffthemobilephone,makeaplantouseresponsibly,usestrongpassword,don’tpostpersonalinformation,downloadtheappfromanofficialwebsite,don’topenemailattachmentsthatcomesfromunknownsourcesQ1: