Unit 5 Using language 课件 -2022-2023学年高中英语外研版2019选择性必修第一册

B4U5UsinglanguagePastperfectBiodiversityActivity1Lookatthesentencesfromthereadingpassageandanswerthequestions.1.Insentence(a),whichactionhappenedfirst,“suspected”or“evolvedfromacommonancestor”?

“evolvedfromacommonancestor”.2.Insentence(b),whichactionhappenedfirst,“refusedtobelieve”or“evolvedfromlowerformsoflife”?“evolvedfromlowerformsoflife”.3.Whatdoesthestructurehaddoneindicate?Itindicatestheactionhappenedbeforeacertainpastaction.Activity1Nowlookformoresentenceswiththepastperfecttenseinthereadingpassage,andsummariseitsuseinyourownwords.1.Itwasayoungmanwhohadleftmedicalschoolwithoutcompletinghisdegree.2....hehadrecentlyreceivedaletterfromhisfatherpredictingthathewouldbe“adisgracetoyourselfandallyourfamily”.3.AfterDarwinhadspentsometimeinSouthAmerica,hisroomontheshipwascrowedwithsamplesoftheplantsandanimalshehadcollected.4.Atthattime,peoplebelievedthatallspecieshadappearedonEarthatthesametime,andhadnotchangedsince.5.Itseemedtheirbeakshadevolvedaccordingtowhatfoodwasavailableonthatparticularisland.6.Overtime,ithadslowlyevolvedintomanynewspecies.Pastperfectform:function:过去完成时与现在完成时的区别：haddone过去某一时刻或某一动作之前已完成的动作或状态，也可以说是“过去的过去”。nowpastfuture过去完成时现在完成时时间参照不同ExercisesCompletethesentenceswiththecorrectformoftheverbsandphrasalverbsinbrackets.Jane_________(watch)anaturefilmonTVwhensomeoneknockedonthedoor.OnourtriptoAfricalastyear,we__________(see)lionssittinginthetallgrasswatchingus.Thegirl,when_________(question)whyshe_________(cheat)intheexam,justloweredherheadandkeptsilent.Theboy_________(cry)loudlybecausehe_________(lose)hiswayinthejungleandthoughthecouldn’tgobackhome.Theyoungmaninsistedhe_________(do)nothingwrongandthatthepolice_________(release)him．Bytheendoflastyear,anothernewhospital_________(complete)inourcity.Igotane­mailfrommyoldfriendlastSunday.Untilthen，we_________(keep)intouchfornearly3years.waswatchingsawquestionedhadcheatedcriedhadlosthaddonereleasehadcompletedhadkeptActivity21.began2.hadledto3.developed4.choseto5.hadmadeCompletetheparagraphswiththeinformationfromthegivensentences.Activity3Completetheonlineencyclopediaentrywiththecorrectformofthewordsinthebox.competedeclineeatliveintroducearrivehadlivedeatenhadintroducedcompeteddeclinedarrivedActivity4

Workinpairs.Actoutarole-playusingtheinformationinActivity3.OneofyouwillplaythekeeperofLonesomeGeorge,andtheotherwillplaythereporteraskingaboutGeorge.Usethepastperfecttensewhereappropriate.BiodiversityActivity5

Listentothepodcastandchoosethestatementsthataremade.1Biodiversityisimportant.2Bacteriaarealwaysharmfultohumans.3Somespeciesofbacteriaareusedinfoodproduction.4Manyspeciesofbacteriarecycledeadorganicmatter.5Ourimmunesystemsareabletofightoffallgerms.Activity6Listenagainandcompletethefactsheet.Discusswhatyouknowaboutcellsandbacteriainpairs.thirtytrillionthirty-ninetrillionmadeupofcellsbricksthatareusedtobuildhouseshelpwithdigestionbreakdownActivity7Doyouknowabout......?Haveyouheardof......?Completetheboxeswiththeexpressionsfromthepodcast.Bytheway......Actually......Infact,......Speakingofwhich,…CheckingbackgroundknowledgeAddinginformationAnswerthequestions.Activity81.Whatspeciesarementionedandwhatisspecialaboutthem?

Thebluewhaleandthewaterbear.ThebluewhaleisthelargestanimalspeciesonEarth,whichcangrowuptoalmost30metresinlengthandweighover130,000kilos.Thewaterbearisprobablythetoughestspecies,whichcansurvivetemperaturesfrom150⁰Ctoabelowfreezing-272⁰C.2.Whatotherunusuallifeformsdoyouknowof?Activity9ishometoarenativetoscientifichabitatsecosystemappearanceprimitiveancestorCompletetheparagraphswiththecorrectformofthewordsandexpressionsinthebox.Activity10Workinpairs.LookatthepicturesofthespeciesnativetodifferentregionsofChina.TalkaboutbiodiversityinChinausingthewordsandexpressionsinthissection.Doonlineresearchtofindmoreinformation.水杉胡杨Smartexpressions宣布……灭绝这种乌龟的灭绝归咎于人类。到那时为止尤其，特别对……有害抵抗病菌因为……而举世闻名是……的家园/栖息地原产于declare…extinctTheextinctionofthetortoiseisblamedonhumans.bytheninparticularbeharmfulto…fightoffgermsberenownedworldwidefor…behometo…benativeto…declare[VN]tosaysthofficiallyorpubliclyusages:1.[VN]e.g.宣战2.[Vthat]e.g.他声明不再竞选连任总统。

3.[VN-N]e.g.宣布挑战成功4.[VN-ADJ]e.g.习主席宣布冬奥会开幕。5.[VNtoinf]e.g.这幅画被判定是赝品(forgery)。declarewaronthecountryHedeclaredthathewouldnotrunforasecondtermaspresident.declarethechallengeasuccessPresidentXideclaredtheBeijing2022WinterOlympicsopen.