Unit5 Using Language 名師教學(xué)設(shè)計(jì)

4/4Unit5UsingLanguage名師教學(xué)設(shè)計(jì)課時(shí)內(nèi)容本課時(shí)涉及的是語言知識運(yùn)用，包括Pastperfect和Biodiversity兩部分：Pastperfect講解過去完成時(shí)的用法，幫助分類總結(jié)過去完成時(shí)的用法特點(diǎn)以及常見的時(shí)間狀語。Biodiversity部分通過聽力和閱讀材料引導(dǎo)學(xué)生了解物種的多樣性。課時(shí)目標(biāo)1.掌握本課時(shí)的重點(diǎn)單詞characteristic、decline、blame、primitive和短語benativeto、makeimportantdiscoveries、inparticular、beharmfulto、behometo、bycontrast、growupto、carryout、serveas的用法，并能在真實(shí)語境中靈活運(yùn)用。2.掌握過去完成時(shí)的用法。3.幫助學(xué)生了解與物種多樣性、自然界相關(guān)的話題內(nèi)容，并能夠恰當(dāng)?shù)剡\(yùn)用功能表達(dá)詢問信息、補(bǔ)充信息。4.通過學(xué)習(xí)了解生物的多樣性，激發(fā)學(xué)生探索大自然奧秘的熱情，進(jìn)而更加熱愛自然、保護(hù)自然。重點(diǎn)難點(diǎn)：重點(diǎn)：過去完成時(shí)的用法。難點(diǎn)：1.過去完成時(shí)的用法。2.學(xué)會(huì)該部分重點(diǎn)單詞、短語和句型的用法。教學(xué)準(zhǔn)備：教師準(zhǔn)備：1.做好該部分內(nèi)容的PPT和音頻材料。2.準(zhǔn)備好一些關(guān)于物種多樣性的圖片或視頻資料，讓學(xué)生進(jìn)一步了解自然界中生物的多樣性。學(xué)生準(zhǔn)備：1.課前總結(jié)和概括自己掌握的過去完成時(shí)的用法。2.上網(wǎng)查找關(guān)于物種多樣性的資料，獲取更多以生物多樣性著稱的加拉帕戈斯群島的信息。3.預(yù)習(xí)課本內(nèi)容，找出該部分的新詞匯，并根據(jù)上下文猜測其含義。教學(xué)過程：StepⅠGrammar—Pastperfect1.DoActivity1onPage53.Lookatthesentencesfromthereadingpassageandanswerthequestions.·Insentence(a),whichactionhappenedfirst,“suspected”or“evolvedfromacommonancestor”?·Insentence(b),whichactionhappenedfirst,“refusedtobelieve”or“evolvedfromlowerformsoflife”?·Whatdoesthestructurehaddoneindicate?Suggestedanswers：·Insentence(a),“evolvedfromacommonancestor”happenedfirst.·Insentence(b),“evolvedfromlowerformsoflife”happenedfirst.·Itindicatestheactionhappenedbeforeacertainpastaction.2.Givemoreexampleswiththepastperfecttense.Guidestudentstosummariseitsuseintheirownwords.Thenaskthemtogiveexamples.3.DoActivity2onPage53.Completetheparagraphswiththeinformationfromthegivensentences.Thesentencesareintheorderinwhichtheyhappened.Theycanhelpyoutodecidetheuseoftenses.(1)aNaturaldisastersledtofoodshortagesinthe1960s.bYuanLongpingbegantodoresearchonhybridrice.cYuanLongpingdevelopedabettertypeofrice.YuanLongping①____________todoresearchonhybridricebecausenaturaldisasters②____________foodshortagesinthe1960s.Intheend,he③____________abettertypeofrice.(2)aGregorMendelchosetostudypeaplantsbecausetheircharacteristicswereeasytocontrol.bGregorMendelmadeimportantdiscoveriesaboutgenetics.cGregorMendeldiedin1884.GregorMendel④____________studypeaplantsbecausetheircharacteristicswereeasytocontrol.Bythetimeofhisdeathin1884,he⑤____________importantdiscoveriesaboutgenetics.Suggestedanswers：①began②hadledto③developed④choseto⑤hadmade4.DoActivities3&4onPage53.(1)CompletetheonlineencyclopaediaentrywiththecorrectformofthewordsinthepetecompetedeclineeatliveintroducearriveLonesomeGeorgeLonesomeGeorgewasthelastPintaIslandtortoise.Hediedin2012.AfterGeorge’sdeath,thePintaIslandtortoisewasdeclaredextinct.TheextinctionofthePintaIslandtortoiseisblamedonhumans.Beforehumans①____________ontheisland.thespecies②____________inisolationand③____________theplantsthatnaturallygrewthere.Georgewasdiscoveredmanyyearsaftertheirarrival，andbythenhumans④____________newspeciesthat⑤____________forthefoodthetortoisesate.Aftergoatsinparticularhadbeenbroughttotheisland，thePintaIslandtortoisepopulation⑥____________.Eventually，onlyGeorgeremained.Suggestedanswers：①arrived②hadlived③eaten④hadintroduced⑤competed⑥declined（2）Workinpairs.Actoutarole-playusingtheinformationinActivity3.OneofyouwillplaythekeeperofLonesomeGeorge，andtheotherwillplaythereporteraskingaboutGeorge.Usethepastperfecttensewhereappropriate.【備注】語法知識點(diǎn)講解詳見第二教案“重點(diǎn)語法精講”?！驹O(shè)計(jì)意圖】這幾個(gè)活動(dòng)的設(shè)置，既緊扣單元話題，又在具體語境中練習(xí)了語法知識，鍛煉了學(xué)生分析問題、解決問題的能力，同時(shí)也提升了學(xué)生探究問題的能力。StepⅡBiodiversity1.DoActivity5onPage54.Listentothepodcastandchoosethestatementsthataremade.①Biodiversityisimportant.②Bacteriaarealwaysharmfultohumans.③Somespeciesofbacteriaareusedinfoodproduction.④Manyspeciesofbacteriarecycledeadorganicmatter.⑤Ourimmunesystemsareabletofightoffallgerms.Suggestedanswers：③④2.DoActivity6onPage54.Listenagainandcompletethefactsheet.Cells·Everylivingthingis①____________.Theyarelike②____________.·Inthehumanbodythereareabout③____________humancellsandaround④____________bacteriacells.Bacteria·Mostbacteriainthehumanbodycan⑤____________.·Inthefoodproductionprocess,bacteriacan⑥____________deadorganicmatter.Suggestedanswers：①madeupofcells②bricksthatareusedtobuildhouses③thirtytrillion④thirty-ninetrillion⑤helpwithdigestion⑥breakdown3.DoActivities7onPage54.Completetheboxeswiththeexpressionsfromthepodcast.Doyouknowabout...?Haveyouheardof...?Bytheway,...Infact,…Actually,…Speakingofwhich,…CheckingbackgroundknowledgeAddinginformationSuggestedanswers：·CheckingbackgroundknowledgeDoyouknowabout…?Haveyouheardof...?·Addinginformationbytheway,…Actually,…Infact,…Speakingofwhich,…4.DoActivity8onPage54.Readthepassageandanswerthequestions.·Whatspeciesarementionedandwhatisspecialaboutthem?·Whatotherunusuallifeformsdoyouknowof?Suggestedanswers：·Twospeciesarementioned：thebluewhaleandthewaterbear.ThebluewhaleisthelargestanimalspeciesonEarth，whichcangrowuptoalmost30metresinlengthandweighover130，000kilos.Thewaterbearisprobablythetoughestspecies，whichcansurvivetemperaturesfrom150℃toabelowfreezing-272℃.·（略）【設(shè)計(jì)意圖】通過活動(dòng)5和活動(dòng)6，引導(dǎo)學(xué)生進(jìn)一步了解生物的多樣性。通過交際用語的使用，鍛煉學(xué)生的口語表達(dá)能力，提升語言交際能力。5.DoActivities9&10onPage55.（1）Completetheparagraphswiththecorrectformofthewordsandexpressionsinthebox.ancestorancestorscientificbenativetoprimitivehabitatappearancebehometoecosystemTheGalápagosIslandsarerenownedworldwidefortheiruniquebiodiversity.TheGiantTortoiseReserveonSantaCruz①__________severalspeciesofgianttortoisethat②__________theGalápagosIslands.TheislandisalsohometotheCharlesDarwinResearchStation,where③__________studiesarecarriedout.MangrovesareoneofthecoastalplantsthatgrowonIsabela.Theyserveasthe④__________forvariousbirdsandfish,andareveryimportanttothe⑤__________.IguanascanbefoundonSanCristóbal.Theyhaveaveryspecial⑥______,withcomb-likespinesontheirback.Thereisevidencethatallthedifferentiguanashavedevelopedfrommore⑦_(dá)_________onesandshareacommon⑧__________.Suggestedanswers：①ishometo②arenativeto③scientific④habitats⑤ecosystem⑥appearance⑦primitive⑧ancestor【設(shè)計(jì)意圖】熟讀文章，在合適的位置選用詞匯的正確形式填空，既鞏固學(xué)生對詞匯的理解與認(rèn)知，鍛煉了學(xué)生對篇章的理解能力，又提升了學(xué)生的語言運(yùn)用能力。同時(shí)，進(jìn)一步鞏固了所學(xué)語法知識。（2）Workinpairs.LookatthepicturesofthespeciesnativetodifferentregionsofChina.TalkaboutbiodiversityinChinausingthewordsandexpressionsinthissection.Doonlineresearchtofindmoreinformation.StepⅢExercisesFillintheblankswiththecorrectformsofthewordsinthebrackets.①Bynineo’clocklastnight,we__________(get)200picturesfromthespaceship.②I__________(be)atthebusstopfor20minuteswhenabusfinallycame.③Hesaidhe__________(work)inthatfactorysince1949.④Ididn’tknowthesewords,forI__________(notstudy)mylesson.⑤We__________(learn)overtwothousand