Unit5Grammar课件-外研版英语八年级下学期

Unit5GrammarLookingintonatureLearningobjectivesInthislesson,wewillbeableto:1.understandthedistinctfunctionsof“that(forfacts)”,“if/whether(foryes/noquestions)”inobjectclausesthroughamberdiscoverytexts.2.analysethestructureofobjectclauses,accuratelyapplyobjectclauseswith“that”,“if”and“whether”inrole-playconversationsaboutscientificreportsonamber.3.helpstudentstopractiseusingtheclauseconnectors“that”“if”and“whether”byconnectingsentencesandcompletingthemessagesonthemessageboard,andthenapplytheseconnectorstowriteashortnatureexplorationpassageinpairs.4.masterthekeylanguagepointsanduseobjectclauseswith“that”“if”and“whether”correctlyinreal-lifecontexts.

Scientistsusedtothinkdinosaurswerescary.WhatdoweknowNOW?Canambertellusaboutancientclimate?WatchandsayWhatcanyouseeinthepicture?Thattheyhadfeathers!Yes!Itshowsif/whetherplantsgrewthere.Perceivetheform例句引导词功能Weknow

that

dinosaurshadfeathers.Iwonder

if/whether

thisambercontainsinsects.thatif/whether陈述事实是否疑问用_____引导已知/确定的信息用_____或_________引导"是否"问题（if/whether）当句子本身是疑问句时，常用_________（whether）WorkouttherulesForhundredsofyears,peoplebelievedthatdinosaurslookedlikehugelizards.Theycantelluswhetherdinosaurshadfeathers,butthat’snotall.thatifwhetherwhetherCouldyoufindmoresentences?WorkouttherulesHowever,thankstoapieceofamber,scientistsnowknowthatthisideaiswrong.Butthefindprovesthatitdid35millionyearsago.Researchshowsthattheyareacompletelynewspecies.Inthefuture,ambermayalsohelpusdiscoverif

otherspecieshavechangedovertime.Whoknowswhether

thispieceofamberwilltellusmoresecrets?陈述确定事实是否疑问Canyouconfirm...?Doesyourreportshow...?PracticeIstherelifeinouterspace?Scientistsaren’tsure.“Iwanttobeascientistandstudyplants,”Johntoldhisparents.IsMrBrowninterestedininsectsorbirds?Emilywantstoknow.Scientistsaren'tsure

whether

thereislifeinouterspace.Johntoldhisparentsthathewantedtobeascientistandstudyplants.EmilywantstoknowwhetherMrBrownisinterestedininsectsorbirds.Connectthesentenceswiththat,iforwhether.MESSAGEBOARDHelloIwenttoyourmuseumtoday.YoumissedPlutointhemodelofthesolarsystem.Therewereonlyeightplanetsinit.Idon’t

know1__________thisisamistake.DearDaniel.Inthepast,peoplethought

2________therewerenineplanets.However,questionswereraisedabout3__________Plutowasaplanet.In2006,scientistsagreed

4_______atrueplanet:1.movesaroundthesun2.isround(ornearlyround)3.canclearthingsinitswayPlutodoesn'tmeetthethirdpoint.Therefore,wenowbelieve5________thereareeighttrueplanetsinthesolarsystem.That’swhyPlutoisn'tpartofthemodel.Pleaseletmeknow6______________youneedmoreinformation.Completethemessageswiththat,iforwhether.whetherthatwhetherthatthatif/whetherWorkinpairs.Lookatthenoticeandwriteashortpassageaboutexploringnature.UsethewordsandexpressionsfromthereadingpassageandtheUsefulexpressionstohelpyou.Writeforus!Thetopicforourmagazinenextmonthwillbeexploringnature,andwewouldlikeYOUtowriteaboutit!Pleasewriteashortpassageaboutdiscoveriesinnatureexploration.Yourpassageshoulddescribe:whatthediscoveryiswhomadethediscoverywhat'samazingaboutitwhatyoucanlearnfromitPleaseuploadyourpassageby30JuneForhundredsofyears,peoplebelievedthat...Itprovesthat......madeanamazingdiscovery.Itteachesusthat...By...,...found/realised/sawthat...Researchshowsthat...UsefulexpressionsUploadyourpassageSomewhalesmakelong,lowsoundsduringswimming.Peopleoften

wonderifthewhalesaresinging.Bywatchingandlisteningcarefully,scientistshavediscoveredthat...UploadShowtimeChecklistStarsLanguage(语言正确)Pronunciation(发音标准)Bodylanguage(使用肢体语言)Creation(有创意)Excellent

Great

GoodNature'swondersinspireustoexplore,learn,andprotect.1.By

watchingandlisteningcarefully,scientistshavediscoveredthat...讲解:

"By+动名词"构成介词短语，表示方式或手段。例句:Bystudyingfossils,weunderstanddinosaurlife.通过研究化石，我们了解恐龙的生活。HeimprovedhisEnglish

bypractisingeveryday.他通过每天练习提高了英语。2.YoumissedPlutointhemodelofthesolarsystem.

讲解:"miss"此处意为“漏掉”；另有“错过,想念”之意。例句:Thelittleboymissedapieceofthepuzzle,sohecouldn’tfinishthepicture.小男孩漏掉了一块拼图，所以他没能拼完这幅图。IwillmissthehappydayswithmyclassmateswhenIgraduatenextyear.明年毕业时，我会想念和同学们一起的快乐时光。Wemissedthebeginningofthemovielastnightbecauseoftheheavyrain.昨晚因为下大雨，我们错过了电影的开头。3.clear...inone’sway讲解:"clear...inone’sway"表示清除行进路上的障碍例句:Theriverclearedthestonesinitsway.河流冲走了它行进路上的石头。Heclearedthebooksinhiswaybeforesittingdown.他坐下前，把挡路的书移开了。Herealised______histheoryaboutdinosaurswaswrong.Theydebated__________thenewdiscoverywasimportant.Tellme___________youneedmoreinformationaboutwhales.Thearticleproves______natureisfullofsurprises.We’renotsure______________theteamwillfinishtheresearchontime.一、用that,if,whether完成句子thatwhetherif/whetherthatif/whether二、英译汉1.Scientistsbelievethatwhalescommunicatethroughsongs.

科学家们相信鲸鱼通过歌声交流。2.Sheaskedwhetherthediscoverywasimportant.

她问这个发现是否重要。3.Idon’tknowifdinosaurshadfeathers.

我不知道恐龙是否有羽毛。三、用that,whether,if完成文章填空Scientistshavediscovered(1)_____somewhalescansingbeautifulsongs.However,theystillwonder(2)_______thesesoundsareusedforcommunicationorjustforfun.Whenresearchersstudyanimals,theyneedtoobserve(3)__________theirbehaviorsmatchtheirthe