2024新版2026春人教版英语八年级下册教学课件：Unit 8 第4课时（Section A 4a-4d）

Unit8MakingaDifference第4课时(SectionA4a-4d)R·八年级下册EnjoyasongReviewandfillInterviewer:Howlonghaveyoubeenavolunteerwiththis_________organization?Volunteer1:Oh,I’vebeenavolunteersince________.Interviewer:Howlonghaveyoubeenavolunteer_____________?Volunteer2:Well,I’veonlybeenaguideherefor_________.footballlastyearatthemuseumtwoweeksInterviewer:Haveyoubeenavolunteerwiththe______________

organizationforlong?Volunteer3:Yes,forabout___________.Ella:Hi,TengFei.Whatareyourplansforthesummerholidays?TengFei:IthinkI’lldosomevolunteerworkata_____________withmyyouthgroup.I’vebeenavolunteertheresince________.beachclean-upsevenyearsnursinghomelastyearInterviewer:Howlonghaveyoubeenavolunteerwiththisfootballorganization?Volunteer1:Oh,I’vebeenavolunteersincelastyear.Interviewer:Howlonghaveyoubeenavolunteeratthemuseum?Volunteer2:Well,I’veonlybeenaguideherefortwoweeks.Interviewer:Haveyoubeenavolunteerwiththebeachclean-uporganizationforlong?Volunteer3:Yes,foraboutsevenyears.Ella:Hi,TengFei.Whatareyourplansforthesummerholidays?TengFei:IthinkI’lldosomevolunteerworkatanursinghomewithmyyouthgroup.I’vebeenavolunteertheresincelastyear.现在完成时表示一个动作或状态从过去某一时间开始一直持续到现在，并有可能持续下去。常和“since”或“for”连用。

4aReadthesentences.Howareforandsinceuseddifferently?Haveyoubeentoouranimalshelterbefore?No,Ihaven’t.Butoneofmyfriendshasvolunteeredhereforalongtime.Hassheeverdonevolunteerwork?Yes,shehas.ShehasbeenavolunteeratanursinghomesincelastAugust.Howlonghaveyoubeenavolunteer?Ihavebeenavolunteerhereforafewmonths.Howlonghasheworkedasavolunteeratthemuseum?Hehasvolunteeredheresincehissummerholidaysstarted.for+时间段since+时间点Butoneofmyfriendshasvolunteeredhereforalongtime.ShehasbeenavolunteeratanursinghomesincelastAugust.since后面接时间点，强调动作或状态的开始时间。for后面接时间段，强调动作或状态的持续时间。如何区分时间段和时间点呢？试着说说哪些是时间点，哪些是时间段吧！5:30fiveyearsthreeminutes2015May5twomonths时间点时间点时间段时间点时间段时间段时间点指的是具体的时间，比如1点、4月7日、2026年12月；时间段指的是一段时间内，比如说三点到四点，中间这一个小时就是一段时间。Haveyoubeentoouranimalshelterbefore?No,Ihaven’t.Butoneofmyfriendshasvolunteeredhereforalongtime.Hassheeverdonevolunteerwork?Yes,shehas.ShehasbeenavolunteeratanursinghomesincelastAugust.Howlonghaveyoubeenavolunteer?Ihavebeenavolunteerhereforafewmonths.Howlonghasheworkedasavolunteeratthemuseum?Hehasvolunteeredheresincehissummerholidaysstarted.观察句中动词，你能发现什么？这些动词都是延续性动词。延续性动词与非延续性动词

延续性动词表示能够延续的动作，这种动作可以延

续下去或产生持久影响，如learn,work,live,know,walk等。

非延续性动词也叫终止性动词、瞬间动词等，表示

不能延续的动作，这种动作发生后即刻停止，如open,close,die,begin,come,go,borrow等。延续性动词可以在现在完成时中与表示一段时间的状

语连用，如“for+一段时间”“since+过去的时间点”

“since引导的时间状语从句（一般过去时）”或

“since+一段时间+ago”等。用法◆Mysisterhaskeptthesepostcardssinceshewasfive.我妹妹从五岁起就留着这些明信片了。非延续性动词可以用于现在完成时，说明某个动作的结果还存在，但在肯定句中不能与表示一段时间的状语连用。TheoldmanhasmovedtoIndiafortwoyears.TheoldmanhasmovedtoIndia.在否定句中，非延续性动词可以与表示一段时间的状语连用。◆Ihaven’theardfrommyfriendforthreedays.

我已经三天没有收到朋友的消息了。非延续性动词（短语）与延续性动词（短语）的转换①直接转换成对应的延续性动词（短语）。buy→have borrow→keep puton→wearbecome→be catchacold→haveacold◆一个星期前他成了动物收容所的一名志愿者。Hebecameavolunteeratananimalshelteraweekago.Hehasbeenavolunteeratananimalshelterforaweek.②转换成“be+形容词/副词/介词/名词等”。come/arrive/go→bein/at begin/start→beonfinish/end/stop→beover open→beopendie→bedead leave→beawayclose→beclosed fallasleep→beasleepfallill→beill comeback→bebackjoin→beamemberof/bein◆林先生到澳大利亚已经十天了。MrLinarrivedinAustraliatendaysago.MrLinhasbeeninAustraliafortendays.Ⅰ.用括号内所给内容的适当形式填空。1.Thefilm___________(be)popularwiththepublicsinceit___________(come)out.2.Tony___________(have)thebikefortwoyears.Hisfather___________(buy)itforhisninthbirthday.3.Linda___________(borrow)

thebookfromthelibraryandshe___________(keep)

itforthreedays.hasbeencamehashadboughtborrowedhaskept4.We___________(know)eachothersincewewereinmiddleschool,andwe’restillbestfriends.5.Lucy___________(notsee)herauntformonths.She___________(miss)hersomuchandwantstovisitherthisweekend.haveknownhasn’tseenmissesⅡ.按要求完成句子，每空一词。6.TheWhiteshavelivedinthecityforabouttwenty

years.（对画线部分提问）______________havetheWhiteslivedinthecity?7.Themeetinghasbeenoverforhalfanhour.（改为一般

疑问句并作肯定回答）—_______themeeting______________forhalfanhour?—_______,it_______.HowlongHasbeenoverYeshas8.PeterandJuliehavebeenmarriedfortwoyears.

（改为同义句）PeterandJuliehavebeenmarried____________________________.9.Mypetcatdiedlastyear.（用sincelastyear改写句子）Mypetcat_____________________sincelastyear.sincetwoyearsagohasbeendead4bCompletethesentenceswiththecorrectformsoftheverbsinbracketsandfororsince.1.Thiscollegestudentenjoysvolunteeringforthe

army.She_____________(teach)Englishtothe

soldiers___________threeyears.2.I___________(be)amemberoftheRedCrossforsixyears.Ihavemadealotoffriends___________Ijoinedtheorganization.hastaughtforhavebeensince军队军人；士兵3.MrWuhastaughtinaprimaryschoolasavolunteer___________twoyearsnow.___________hestartedworkingthere,he___________(help)manystudents.4.Theorganization___________(train)over6,000volunteers___________itbegantoofferclassesthreeyearsago.forSincehashelpedhastrainedsince小学教育的；首要的=morethan多于；超过4cCompletethepassagewiththecorrectformsoftheverbsinbrackets.Ilovebeingavolunteer!I____________(work)withasportsorganizationforalmostthreeyearsnow.SinceIstarted,

I__________(help)outatovertendifferentsportsevents.I__________(make)manyhaveworkedhavehelpedhavemade=nearlyhelpout分担工作；帮忙做newfriendsandI__________even_________

(meet)manyfamousathletes.Forexample,I_________(meet)twonationalfootballplayersfromArgentinalastmonth.Theywereatastadiumforacharitymatch.Thestadium__________(be)sobigthatthey__________(get)lost.Igavethemdirectionsandthey__________(smile)and__________(thank)mewarmly.Iamproudtobeavolunteer.havemetmetwasgotsmiledthanked慈善机构（或组织）；慈善事业热情地；温暖地例如getlost迷路beproudtodosth为做……感到骄傲/自豪4dWorkingroups.Interviewyourgroupmatesusingthequestionsbelow.Sharetheanswerswiththeclass.Howlonghaveyouknownyourbestfriend/...?hadyourfavouritetoy/...?livedinyourneighbourhood/...?A:Howlonghaveyouknownyourbestfriend?B: