Unit 5 Section B Using Language 教案-2022-2023学年高中英语外研版2019选择性必修第一册

Unit5RevealingnatureSectionBUsingLanguage教学设计科目：英语课题：SectionBUsingLanguage课时：1课时教学目标与核心素养：知识目标：学生可以通过呈现课文中的语句，帮助学生归纳总结过去完成时的用法能力目标：学生能够熟练利用语篇活动帮助自己巩固语法知识情感目标：引导学生了解自然界中生物多样性，激发学生走进自然，探索自然的兴趣使学生更好的理解人与自然和谐相处的重要意义教学重难点教学重点：引导学生观察例句，发现并总结过去完成时的规则，完成练习教学难点：提高学生学习语法的兴趣课前准备：多媒体，黑板，粉笔教学过程：一、Pre-class1.Greeting2.Leading-in教师活动：带领学生复习本节课的单词教师引导学生观察例句并归纳总结过去完成时的特点。完成活动1。Lookatthesentencesfromthereadingpassageandanswerthequestions.aDarwinsuspectedthatthefincheshadevolvedfromacommonancestor,.bManypeoplerefusedtobelievethatlivingthings,includinghumans,hadevolvedfromlowerformsoflife.1Insentence(a),whichactionhappenedfirst,"suspected"or"evolvedfromacommonancestor"?2Insentence(b),whichactionhappenedfirst,"refusedtobelieve"or"evolvedfromlowerformsoflife"?3Whatdoesthestructurehaddoneindicate?1Insentence(a),"evolvedfromacommonancestor"happenedfirst.2Insentence(b),"evolvedfromlowerformsoflife"happenedfirst.3Itindicatestheactionhappenedbeforeacertainpastaction.While-class过去完成时是很重要的动词的时态，也是学生在使用中常常出错的语法项目，教师应引导学生在了解其基本概念和用法的基础之上，深刻理解“过去的过去”的含义，并在活动中加以体会，最终掌握并灵活运用。过去完成时的基本用法：1）表示在过去的某一时间或某一动作之前完成的动作或存在的状态，即“过去的过去”。例如：a.Beforewegottothetrainstation,thetrainhadalreadyleft.我们到达火车站之前，火车就已经离开了。b.BeforeIcouldsay"thankyou",hehadrunaway.我还没来得及说谢谢，他就跑开了。2）表示从过去某一时间开始，一直延续到过去的另一个时间的动作，常用的时间状语有bythen,bytheendof,bythetime。例如：a.Bytheendoflastterm,wehadlearnt2,000Englishwords.到上学期期末为止，我们已经学习了2,000个英语单词了。b.Theyhadlivedtherefortenyearsbythen.到那时为止，他们已经在那里住了10年了。3）表示愿望、打算等的动词，如hope,want,expect,think,mean,suppose,intend,plan等后接从句时,一般用过去完成时表示本打算实现而未实现的愿望和计划。例如：a.Ihadintendedtomeethimattheairport,butIhadanimportantmeetingtoattend.我本打算去机场接他，但是我有个重要的会议要参加。b.IhadhopedtotakeaholidaythisyearbutIwasnotabletogetaway.我原打算今年去度假，可是我离不开。4）在句型hardly…when和nosooner…than中，主句用过去完成时，从句用一般过去时，表示“一……就……”。例如：a.HardlyhadIleftwhenitbegantorain.我刚离开就开始下雨了。b.Nosoonerhadhesatdownthanthetelephonerang.他刚坐下，电话铃就响了。教师带领学生填空，在真实语境中巩固对动词不同时态的理解。第一步：学生阅读活动指令、句子和语篇，理解活动目的和语篇内容。第二步：引导学生关注动作发生的先后顺序，运用恰当的时态独立完成活动2的语篇。第三步：请个别学生说出答案，全班核对答案。1aNaturaldisastersledtofoodshortagesinthe1960s.bYuanLongpingbegantodoresearchonhybridrice.cYuanLongpingdevelopedabettertypeofrice.YuanLongping1______todoresearchonhybridricebecausenaturaldisasters2_____foodshortagesinthe1960s.Intheend,he3_____abettertypeofrice.2aGregorMendelchosetostudypeaplantsbecausetheircharacteristicswereeasytocontrol.bGregorMendelmadeimportantdiscoveriesaboutgenetics.cGregorMendeldiedin1884.GregorMendel4_____studypeaplantsbecausetheircharacteristicswereeasytocontrol.Bythetimeofhisdeathin1884,he5_____importantdiscoveriesaboutgenetics.参考答案：1began2hadledto3developed4choseto5hadmad背景信息YuanLongpingYuanLongpingwasborninBeijingin1930.Afterhegraduatedfromuniversityintheearly1950s,hededicatedhimselftotheresearchofagriculture.Yuanhadtheideatocreateanewbreedofriceinthe1960s.Sincethen,hehasworkedtirelesslytoresearchanddevelopabetterricebreed.In1973heandhiscollaboratorsmanagedtocultivateahybridricespeciesthatwassuperiortomanyothers.Thisspeciesproduced20percentmorericeperplantthanthecommonlygrownvarieties.Forhisachievementsandcontributions,Yuanisknownasthe"fatherofhybridrice"andwasawardedtheMedaloftheRepublicin2019.GregorMendelGregorMendel(1822–1884)wasaninfluentialbotanist.Mendelworkedoutthebasicprinciplesofhereditybyexperimentingwithplants.In1866,hepublishedhisfindings,showinghowinvisible"factors"(nowknownasgenes)areresponsibleforpredictablevisibletraits.Asaresultofhiswork,hebecameknownasthe"fatherofmoderngenetics".学生活动：完成活动3。declinecompeteeatliveintroducearriveLonesomeGeorgeLonesomeGeorgewasthelastPintaIslandtortoise.Hediedin2012.AfterGeorge'sdeath,thePintaIslandtortoisewasdeclaredextinct.TheextinctionofthePintaIslandtortoiseisblamedonhumans.Beforehumans1_____ontheisland,thespecies2_____inisolationand3_____theplantsthatnaturallygrewthere.Georgewasdiscoveredmanyyearsaftertheirarrival,andbythenhumans4_____newspeciesthat_____5forthefoodthetortoisesate.Aftergoatsinparticularhadbeenbroughttotheisland,thePintaIslandtortoisepopulation6_____.Eventually,onlyGeorgeremained.1arrived2hadlived3eaten4hadintroduced5competed 6declined三、After-classWorkinpairs.Actoutarole-playusingtheinformationinActivity3.OneofyouwillplaythekeeperofLonesomeGeorge,andtheotherwillplaythereporteraskingaboutGeorge.Usethepastperfecttensewhereappropriate.完成练习题1.IturnedontheTVassoonashe______(enter)theroom.2.Heregrettedthemomenthe_______(say)this.3.Wewererelievedtolearnthatalltheminers______(rescue)fromtheaccident.4.Thepolicefoundthelostboy.He______(run)awayfromhomefivedays