Unit 3 The Internet Discovering Useful Structures 课件- 高一上学期英语人教版（2019）必修第二册

Unit3The

Internet—Grammar主备人：韦苗苗议课时间:2月上课时间:3月学习目标(1’)1.Identifyandsummarizetheformandthe

functionsofthepresentperfectpassivevoice;2.Comparethepresentperfectpassivevoicewith

theactive,andchangetheactiveformintothepassive

form;3.Applythepresentperfectpassivevoiceintouse1.MuchhasbeenwrittenaboutthewondersoftheWorldWide

Web.问题导学1(1’)Observeandtranslatethefollowingsentences,andtrytofindsomethingincommonfromthesesentences.2.People’sliveshavebeenchangedbyonlinecommunitiesand

socialnetworks.问题导学1(3’)3.Manypeoplehavebeenhelpedbytheclub.…已经被书写…已经被改变have/hasbeendone

…已经被做表示“某人/某事/某物已经被…”…已经被帮助hasbeenwrittenhavebeenchangedhavebeenhelped问题导学1(1’)点拨精讲1(3’)Observeandtranslatethefollowingsentences,andfindthedifferencesamong“have/hasdone”and“have/hasbeendone”.have/hasdonehave/hasbeendone主语和动作之间是主动关系主语和动作之间是被动关系1.Awomanhasstartedasmallonlinecompanywithtwofriends.1.Asmallonlinecompanyhasbeenstartedbyawomanwithtwo

friends.2.Theinternethasmadeourlivesmoreconvenient.2.OurliveshasbeenmademoreconvenientbytheInternet.…已经开始…已经被开始…已经使…已经被使hasstartedhasbeenstartedhasmadehasbeenmade即学即练1.Ihaveaskedhertohelpyou.将下列主动句变为被动句2.Theyhavefoundagoodplacetobuildalibraryinthecity.3.Wehaveplantedmanytreesonthehillinthelasttwoyears.Shehasbeenaskedbymetohelpyou.Agoodplacehasbeenfoundbythemtobuildalibraryinthecity.Manytreeshavebeenplantedbyusonthehillinthelasttwoyears.问题导学2(4’)Theletter

(post)already.Observethefollowingsentencesandtrytofillintheblanks.hasbeenpostedManyhouses

(build)forthepoorsofar.havebeenbuilt点拨精讲2(4’)用法1:被动动作发生在过去,已经完成,对现在造成影响

或产生结果。(already,yet,sofar,bynow)问题导学2(4’)Themachine

(repair)fortwohoursbutitstilldoesn’twork.hasbeenrepairedPapermoney

(use)forover50years.hasbeenused点拨精讲2(4’)用法2:被动动作发生在过去,持续到现在,并有可能继续

持续下去。(for+一段时间;since)Everyonewillfeelextremelydelightedifhe________________(admit)toSouthChinaNormalUniversity.Youshouldn’tleaveschoolbeforeyourhomework_______________(finish).hasbeenadmittedhasbeenfinished用法3:在时间/条件状语从句中表示可能还没有发生的被动动作。点拨精讲2(10’)1.Themachinehasbeenrepairedalready.2.Themachineisbeingrepairednow.

3.Themachinewasrepairedyesterday.说明动作发生在过去,对现在有影响,“现在修好了”说明动作正在进行只说明动作发生在过去4.Thebabyhasbeentakengoodcareof.4.Thebabyhasbeentakengoodcare.Attention:在被动结构中,动词短语的介词或副词不可去掉5.Greatchangeshavebeentakenplacesince1978.5.Greatchangeshavetakenplacesince1978.Attention:不及物动词或词组无被动即学即练1.Morethan5000usedbikes

(collect)

sincethetwobrotherssetuptheorganization.2.He

(employ)atthisjobsince1990.3.Hisnovel

(translate)into25languages.havebeencollectedhasbeenemployedhasbeentranslated课堂小结(1’)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,强调对现在的影响have/hasbeendone形式肯定式否定式疑问式have/hasbeendonehave/hasnotbeendoneHave/Has+主语+beendone?特殊疑问词+have/has+主语+beendone?用法表示已经完成的被动动作表示开始于过去并可能持续下去的被动动作在时间状从,条件状从中,表示还未发生的被动动作注意事项区分have/hasbeendone/bebeingdone/bedone不及物动词或词组无被动当堂检测(15’)

Greatchanges1.__________(take)placeinmyhometowninthepastfewdecades.

Thepublicfacilities(设施)2._________________(improve)sofar.Many

3.______(road)havebeenwiden.Besides,

Moreattentionhasbeengiventothe4._____________(environment)protection,somanytreesandflowers5._______________(plant)now.Thewaterintheriversaswellastheair6.___________(become)cleanagain.7._____manypeoplesay,

8.___

seems