2024新版2026春人教版英语八年级下册教学课件：Unit8 第3课时Section A(Grammar Focus 4a-4d)

Unit8

MakingaDifference第三课时SectionA(GrammarFocus4a—4d)人教版

八年级英语（下）Readthesentences.Howareforandsinceuseddifferently?4aHaveyoubeentoouranimalshelterbefore?No,Ihaven't.Butoneofmyfriendshasvolunteeredhereforalongtime.Hassheeverdonevolunteerwork?Yes,shehas.ShehasbeenavolunteeratanursinghomesincelastAugust.Howlonghaveyoubeenavolunteer?Ihavebeenavolunteerhereforafewmonths.Howlonghasheworkedasavolunteeratthemuseum?Hehasvolunteeredheresince

hissummerholidaysstarted.GrammarFocus(一)含since或for的现在完成时某些动词的现在完成时可表示从过去某一时间开始并一直持续到现在的动作或状态，常与“for+时间段”和“since+过去的时间点或从句”连用。Hehasworkedhereforovertwentyyears.他已经在这里工作二十多年了。Hehaslearntabout2,000EnglishwordssincehestartedlearningEnglish.他自开始学英语以来已经学了大约2000个英语单词。Thefactoryhasbeenheresincethe1970s.这家工厂从20世纪70年代起就在这里了。含for和含since的现在完成时的句子有时可互相转换。我从13年前开始就住在这里。I’velivedherefor13years.Ithasbeen13yearssinceIbegantolivehere.（二）现在完成时中的谓语动词规则变化在含有现在完成时的肯定句中，与表示持续性时间的状语连用的动词一般为延续性动词，但在否定句中，可以用非延续性动词。常见的延续性动词有have、live、teach、learn、work、study、know等；常见的非延续性动词(词组)有come、go、leave、start、die、finish、become、join、buy、getmarried等。HehasjoinedthecommunistyouthLeaguefortwoyears.HehasbeenamemberofthecommunistyouthLeaguefortwoyears.（）（）第一课时1a-2d他加入共青团两年了。Ihaveboughtthiswatchfortwoyears.Ihavehadthiswatchfortwoyears.（）（）第一课时1a-2d这块手表我买了两年了。部分非延续性动词(词组)和与之对应的延续性动词(词组）非延续性动词(词组)延续性动词(词组)becomebeborrowkeepbuyhaveleavebeawayfromfallasleepbeasleepmakefriendsbefriends非延续性动词(词组)延续性动词(词组)finishbeoveropenbeopenclosebeclosedlosebelostdiebedead非延续性动词(词组)延续性动词(词组)joinbeamemberof/beinbegin/startbeoncome/go/arrivebein/atturnon/offbeon/offgettoknowknowmarry/getmarriedbemarried（三）现在完成时和一般过去时的区别现在完成时：表示过去发生的某一动作对现在造成的影响或产生的结果，强调的是现在的情况；不能和表示过去的时间状语连用。Hehaslivedheresince2008.自2008年以来他一直住在这里。(他现在还住在这里)（三）现在完成时和一般过去时的区别—般过去时：只表示过去的动作或状态，和现在不发生联系；可以和表示过去的时间状语连用。Helivedherein2012.2012年他住在这里。(不涉及他现在是否还住在这里)Completethesentenceswiththecorrectformsoftheverbsinbracketsandfororsince.4b1.Thiscollegestudentenjoysvolunteeringforthearmy.She_____________(teach)Englishtothesoldiers_____threeyears.2.I__________(be)amemberoftheRedCrossforsixyears.Ihavemadealotoffriends________Ijoinedtheorganization.hastaughtforhavebeensince3.MrWuhastaughtinaprimaryschoolasavolunteer________twoyearsnow._________hestartedworkingthere,he__________(help)manystudents.4.Theorganization___________(train)over6,000volunteers__________itbegantoofferclassesthreeyearsago.forSincehashelpedhastrainedsince4cCompletethepassagewiththecorrectformsoftheverbsinbrackets.Ilovebeingavolunteer!I____________(work)withasportsorganizationforalmostthreeyearsnow.SinceIstarted,I____________(help)outatovertendifferentsportsevents.I____________(make)manynewfriendsandI________even________(meet)manyfamousathletes.Forexample,I______(meet)twonationalfootballplayersfromArgentinalastmonth.haveworkedhavehelpedhavemadehavemetmetTheywereatastadiumforacharitymatch.Thestadium_______(be)sobigthatthey_______(get)lost.Igavethemdirectionsandthey________(smile)and____________(thank)mewarmly.Iamproudtobeavolunteer.wasgotsmiledthanked4dWorkingroups.Interviewyourgroupmatesusingthequestionsbelow.Sharetheanswerswiththeclass.Howlonghaveyouknowyourbestfriend/...?hadyourfavouritetoy/...?livedinyourneighborhood/...?

SampleInourgroup,Mariahaslivedinthisneighborhood

foronlyoneyear,butsheknowsitverywell.Tomhaslivedintheneighborhoodsincehewasababy.Andhehashadhisfavoritetoy,asoftteddybearfor9years.Hereceiveditonhisfifthbirthday.TomhasagoodfriendcalledJimmyandtheyhavebeengoodfriendsforsixyears....1、Lindalikesservinginthearmy.琳达喜欢在军队服役。army作名词，意为“军队”，复数形式为armies。常见搭配：jointhearmy（参军）、serveinthearmy（服兵役）、thearmyandnavy（陆海两军）、regulararmy（正规军）。Hedecidedtojointhearmyaftergraduation.他毕业后决定参军。Languagepoints2、MrWuhastaughtinaprimaryschoolasavolunteerfortwoyearsnow.作为志愿者吴先生现在已经在一所小学任教两年了。primaryadj.小学教育的；首要的(1)adj.小学教育的，用于名词前作定语。primaryschool小学primaryeducation小学教育Formiddleandprimaryschoolstudents,learningtocookhasbecomeamust.对于中小学生来说，学习烹饪已经成为必须要做的事。(2)adj.首要的Personalsafetyisofprimaryimportance.人身安全至关重要。3、SinceIstarted,Ihavehelpedoutatovertendifferentsportsevents.自我开始工作以来，我已经协助了十多场不同的体育赛事。helpout意为“分担工作；帮忙做”。help(sb)outwithsth帮助某人处理某事Canyouhelpmeoutwiththeheavyboxes?你能帮我搬一下这些重箱子吗？I’llhelpoutwiththepartypreparations.我会帮忙准备派对。4、Theywereatastadiumforacharitymatch.他们正在体育场参加一场慈善比赛。

charity名词1）表示“慈善（行为/事业）”，为不可数docharity（做慈善）charitywork（慈善工作）outofcharity（出于慈善）Allthemoneyraisedwillbedonatedtocharity.所有筹集的资金将捐给慈善事业。2）表示“慈善机构/组织”，可数，复数形式为chari