2024九年级英语下册Unit4LifeonMarsPeriod3Grammar课件牛津译林版

Period3GrammarUnit4

LifeonMarsAUsingadverbialclausesorsimplesentencesWecanrewritesomeadverbialclausesinsimplesentenceswithprepositionalphrasesbeginningwithattheageof,becauseofandwithout.NeilArmstrongreceivedhisstudentpilot’slicencewhenhewas16.→NeilArmstrongreceivedhisstudentpilot’slicenceattheageof16.Peoplemightfloatinspacebecausethegravityislow.→Peoplemightfloatinspacebecauseofthelowgravity.Humanscannotsurviveifthereisnofood,wateroroxygen.

→Humanscannotsurvivewithoutfood,wateroroxygen.LearningaboutouterspaceDanieliswritingaboutvisitinganotherplanet.Helphimrewritethesentencesusingthewordsinbrackets.1.NeilArmstrongtookhisfirstflightwhenhewasonlysix.(attheageof)____________________________________________________NeilArmstrongtookhisfirstflightattheageofsix.2.YuriGagarinbecamethefirstmantogointoouterspaceattheageof27.(when)________________________________________________________________________________________________________3.PeoplemightmovetoanotherplanetinthefuturebecausethepopulationontheEarthisincreasingrapidly.(becauseof)________________________________________________________________________________________________________YuriGagarinbecamethefirstmantogointoouterspacewhenhewas27.PeoplemightmovetoanotherplanetinthefuturebecauseoftherapidincreaseinthepopulationontheEarth.4.Ifthereisnofreshfood,mealswillnotbeastastyastheyaretoday.(without)_______________________________________________________5.ItwouldbefunnytoplayfootballonMarsbecauseofthelowgravity.(because)______________________________________________________________________________________________________________Withoutfreshfood,mealswillnotbeastastyastheyaretoday.ItwouldbefunnytoplayfootballonMarsbecausethegravityislow.6.Withoutspecialboots,youcannotwalkonMars.(if...not)____________________________________________________

Ifyoudonotwearspecialboots,youcannotwalkonMars.BUsingobjectclausesorsimplesentencesWecanrewritesomeobjectclausesinsimplesentenceswithprepositionslikeofandabout.ThesmellofthepillsremindsthemthatfoodontheEarthistasty.→ThesmellofthepillsremindsthemofthetastyfoodontheEarth.Aretheysurethatspacetravelwillbeveryfast?→Aretheysureaboutthefastspeedofspacetravel?AbouttheplanetMarsMillieknowslittleabouttheplanetMars.SheisaskingDanielformoreinformation.RewriteMillie’ssentencesusingthewordsinbrackets.Millie:(1)AreyouawarehowfarMarsisawayfromtheSun?

Daniel:Yes.Marsisabout142,000,000milesawayfromtheSun.IttakesMarsabouttwoEarthyearstocirclearoundtheSunonce.

①Millie:(2)ArescientistsinagreementthatlivingonMarswouldbepossibleforhumansinthefuture?②Daniel:No.Butthey’reworkinghardtolearnmoreaboutMars.温馨提示：此符号表示“考点精讲点拨”链接。名词形式possibilityMillie:(3)DotheythinkthatthelowgravityonMarsmightbeaproblem?Daniel:Yes,theydo.Millie:(4)AreyouawarewhattransportcouldbelikeonMars?Daniel:ItcouldbemuchbetterthanthatontheEarth.However,scientistsaren’tsurewhetherpeoplecouldgrowplantsonMars.Millie:(5)IwonderhowmanypeoplewouldliketomovetoMars.(6)IthinkpeopleshouldknowthatlifeonMarswouldbedifferentfromthatontheEarth.1.Areyouaware___________________________________(distance)?2.Doscientistsagree_______________________________________________________________________________________(possibility)?3.Havetheythought________________________________________(problem)?4.Areyouaware___________________________________(transport)?ofthedistancebetweenMarsandtheSunabout/withthepossibilityoflivingonMarsforhumansinthefutureabouttheproblemofthelowgravityonMarsofthetransportonMars5.Iwonder________________________________________________________________________________________________(number).6.Ithinkpeopleshouldknow________________________________________________________________________________(differences).aboutthenumberofpeoplewhowouldliketomovetoMarsthedifferencesbetweenlifeonMarsandthatontheEarthCUsingdefiningrelativeclausesorsimplesentencesWecanrewritesomedefiningrelativeclausesinsimplesentenceswithprepositionslikewithandin.Peoplemightliveinhouseswhichhavehugecomfortablerooms.→Peoplemightliveinhouseswithhugecomfortablerooms.OnMarsyoumightseepeoplewhowearspecialboots.→OnMarsyoumightseepeopleinspecialboots.C1SimoniswritingaboutMars.Rewritethedefiningrelativeclausesinsimplesentenceswiththeprepositionwithorin.1.MarsisaplanetthathasanenvironmentsimilartothatoftheEarth.2.AstronautswhowearspacesuitsandhelmetsmightstayonMarsforhours.3.ItisdifficulttobreatheonaplanetthathasmuchthinnerairthanthatontheEarth.4.OnMarstheremightbepeoplewhocarryairtanksontheirbacks.C2Simonisinterestedinstoriesaboutaliens.Heevenwritestoaliens.Replaceeachoftheunderlinedpartsinhisletterwithanotherexpression.Dearaliens,Humansarethinkingaboutmovingtoanotherplanet(1)becausethepollutionontheEarthisveryserious.Manypeopleareinnodoubt(2)thatlifeonMarswouldbeveryinteresting,butIamnotsure.③WecouldnotplayfootballonMars(3)becauseofthelowgravity.Lifewouldbeboringforme(4)ifIcouldnotplayfootball.Maybethisproblemcouldbesolvedbybuildingindoorplaygrounds(5)whichhavethesamefootballfieldsasthoseontheEarth.Bytheway,wouldstrangersbewelcome?④

Ihopetohearfromyousoon.Simon考点精讲①IttakesMarsabouttwoEarthyearstocirclearoundtheSunonce.circle/'sɜːkl/v.围绕；将……圈起来n.圆圈；圈子e.g.Circlethewordsonthislistthatyourecognize.把这张表上你认识的字圈起来。Theplanecircledtheairporttoburnupexcessfuel.飞机在机场上空盘旋以耗掉多余的燃料。Thechildrenstoodinacircle.孩子们站成一圈。考点1返回温馨提示:可返回原文考点精讲②ArescientistsinagreementthatlivingonMarswouldbepossibleforhumansinthefuture?agreement/ə'griːmənt/n.一致，同意考点2agreement的相关短语：①beinagreement=agree同意；(意见或看法)一致②reachagreement=cometoagreement意见达成一致考点精讲e.g.I’mgladweareinagreementaboutatleastonething.我很高兴至少我们就一件事达成了一致。Weareinagreementwiththeirdecision.我们同意他们的决定。Thetwosidesfailedtoreachagreement.双方未能取得一致意见。拓展：agreement作可数名词时，意为“协定；协议”，常用短语reach/cometoanagreement意为“达成协议”。e.g.I’msurewecanreachanagreementsoon.我肯定我们很快可以达成协议。考点精讲构词法记单词“动词＋ment”构成的名词：development发展enjoyment享受；令人愉快的事achievement成就excitement兴奋；激动movement活动；运动disappointment失望；令人失望的事考题1：Afterthe“doublereduction”policy（“双减”政策）iscarriedout,myparentsandIhavereachedan___________(agree)onreadingmorebooksanddoingmoresportsatweekends.【点拨】句意：“双减”政策实施后，我的父母和我在周末多读书，多运动上达成了协议。reachanagreement达成协议。agreement考点精讲返回考点精讲③Manypeopleareinnodoubt(2)thatlifeonMarswouldbeveryinteresting,butIamnotsure.doubt/daʊt/n.疑问，疑惑v.怀疑e.g.Youcanaskmeifthereisanydoubt.如果有任何疑问，你可以问我。考点3doubt的常用搭配：①doubtsth.怀疑某事②withoutdoubt毫无疑问③nodoubt无疑考点精讲拓展：doubt还可作动词，意为“怀疑”。后接名词、代词、if/whether/that从句等作宾语。e.g.Noonedoubtshisability.没有人怀疑他的能力。Idoubtwhether/ifthenewonewillbeanybetter.我不敢肯定这个新的是否会好些。返回考点精讲④Bytheway,wouldstrangersbewelcome?stranger/'streɪndʒə(r)/n.外来者，陌生人e.g.Inthewoods,hemettwostrangers.在树林里，他遇到了两个陌生人。Hehassomestrangeideasabouttheproject.他对那个项目有一些奇怪的看法。拓展：stranger还可表示“外地人；新来者”。e.g.HeisastrangerinNewYork.在纽约他是一个异乡人。考点4考题2：[滨海一调]Themannextdoorisa______toBruce.Hedoesn’tevenknowtheneighbour’sname.A.strangerB.volunteerC.trainerD.teacherA考点精讲陌生人志愿者教练教师strange的词形变化：strangeadj.奇怪的；陌生的strangestrangern.陌生人返回简单句和复合句之间的转换（二）单元语法简单句和复合句之间的转换（二）用介词(短语)把状语从句转换成简单句由when，before，after等引导的时间状语从句，可以用合适的介词短语来代替。①由if，unless引导的条件状语从句，可改为由without引导的介词短语。②单元语法简单句和复合句之间的转换（二）用介词(短语)把状语从句转换成简单句由because引导的原因状语从句，可改为由becauseof构成的介词短语。③（as...）as引导的比较状语从句，有时可改为“beofthesame+名词”结构。④单元语法简单句和复合句之间的转换（二）用介词把宾语从句转换成简单句某些动词后的宾语从句，可以用介词加名词、代词或动名词（短语）转化成简单句。⑤用介词把定语从句转换成简单句如果定语从句中的谓语动词have表示“有”的含义，从句可转换成with短语作后置定语。⑥1e.g.We’llplayfootballwhenschoolisover.→We’llplayfootballafterschool.放学后我们要踢足球。2e.g.Peoplecan’tsu