Unit 6 Live green Understanding ideas Grammar 课件 2026-2027学年外研版英语九年级上册

年

级：九年级学科：

英语（外研版）Unit6LivegreenUnderstandingideasGrammarReviewPlastic:goodorbad?1Whenplasticwasinventedaroundthe1860s,itwasconsideredanamazingmaterial.Itwaslight,easytoshape,long-lastingandcheap.Itquicklyreplacedwoodandothernaturalmaterials.Manypeoplebelievedplasticwouldmakelifebetter.Backthen,somepeopleevensawplasticasan“environmentalhero”.2Notsurprisingly,plastichasnowfilledourlives.Wecanfinditinbags,bottles,toothbrushes,gloves,mobilephones,cars,houses…younameit.Itiscertainlyconvenientandhasthousandsofuses.Despiteallthis,ithasslowlyandquietlyshownitsdarkside.Plasticwastewasfirstseenintheoceansinthe1960s.Sincethen,ithasbecomeadangertoseaanimals.Someanimals,suchaswhales,eatitbymistakeanddie.Theformer“hero”killsmorethan100,000seaanimalseveryyear.By2050,therecouldbeevenmoreplasticthanfishintheseabyweight.3Plasticisalsocausingproblemsonland.Birds’wingsgettiedinplasticlines.Bears’headsgetstuckinplasticbins.Cowsmistakeplasticbagsforfood!Evenhumansareeatingplasticwaste!Onaverage,weeatfivegramsofplasticaweek.That’sawholebankcard!Tinypiecesofplasticarefoundintheairwebreathe.Theycanbecarriedaroundbythewind.Thereisevenplastic“snow”attheNorthandSouthPoles.On“PlanetPlastic”,thereisnoplacefreefromthis.4Plasticwasteishardtodealwith.Itmaytakehundredsofyearstobreakdown.Therefore,hidingthewasteinthegrounddoesn’tsolvetheproblem.Burningitalsoproducesthicksmokethatcausesairpollution.5Plasticmakeslifeeasierformanypeople,yetitbringslong-lastingtroublestoourplanet.Ourchoicestodaychangetheworldtomorrow.WithnoPlanetBtoturnto,wemustthinkclearlyanduseplasticwisely.Whatisthewriter’sattitudetoplasticuse?Thewriter’sattitudeiscarefulandbalanced.Wemustuseitwisely.carefulbalancedwiselycarebalancewisewordformation(构词法)ReadandthinkItquicklyreplacedwoodandothernaturalmaterials.(b)Evenhumansareeatingplasticwaste.(c)Plasticmakeslifeeasierformanypeople,yetitbringslong-lastingtroublestoourplanet.ReadandthinkItquicklyreplacedwoodandothernaturalmaterials.(b)Evenhumansareeatingplasticwaste.(c)Plasticmakeslifeeasierformanypeople,yetitbringslong-lastingtroublestoourplanet.Canyoufindtherulesofformation?quicklywasten.long-lastingquickwastev.long+lastingderivation(派生)conversion(转化)composition(合成)Learn

and

think通过在词根前面加前缀(prefix)或者在词根后面加后缀(suffix)构成一个新词的方法称作派生法。derivation(派生)一般情况下，前缀往往改变词根的词义，不改变词根的词性;而后缀往往改变词根的词性，有些也涉及意义的变化。大部分前缀和后缀都有固定的意义，因而许多派生词的词义可以通过词根及词缀的意思推知。前缀含义例词-dis不disagree,dislike-il不illegal(不合法的)-im不impossible,impatient-in不informal,inconvenient-ir不irresponsible(不负责的)-un不unhappy,unfair-mis错误的，不misunderstand,mistrust-non不，非non-smoker,non-native-re再，重复rewrite,retell-inter在…之间，相互international,interconnectLearnandthink后缀例词动词变名词的后缀-al-ance-ence-ion-ation-(s)sion-ing-ment-ure-ture-yarrival,survivalappearance,performanceexistence,preferenceeducation,attractionexplanation,imaginationdiscussion,decisionhearing,beginningachievement,treatmentfailure,pressuremixture,departurerecovery,discoveryLearnandthink形容词变名词的后缀后缀例词-age-cy-dom-ence-ness-th-y/ty/ityshortagefluency,privacyfreedom,wisdomdifference,silenceweakness,kindnessstrength,warmth,truthdifficulty,safety,responsibilityLearnandthink后缀例词表示人的名词后缀-er-or-ar-ess-ian-ist-antcleaner,strangerinventor,visitorliar,beggar(乞讨者)hostess,actressmusicianartist,scientistservant(仆人)Learnandthink表示数词名词后缀后缀例词变动词的前缀和后缀前缀例词后缀-teen-ty-then--en-ify-izefifteen,seventeenforty,sixtyfifth,sixthenable,encouragedarken,deepenbeautify,simplifymemorize,realizeLearn

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thinkderivation(派生)转化方式例词namen.名字v.给…取名land

n.陆地v.降落rainn.雨v.下雨backn.后背adj.背后的Chinesen.中国人adj.中国人的openv.打开adj.打开的complete

v.使完整adj.完整的enough

adv.足够地adj.足够的last

adv.最后adj.最后的conversion(转化)把一种词性转化为另一种词性而词形不变的方法称作转化法。v.

⇌n.n.

⇌adj.v.

⇌adj.adv.

⇌adj.namen.名字v.给…取名land

n.陆地v.降落rainn.雨v.下雨backn.后背adj.背后的Chinesen.中国人adj.中国人的openv.打开adj.打开的complete

v.使完整adj.完整的enough

adv.足够地adj.足够的last

adv.最后adj.最后的Learnandthinkcomposition(合成)把两个或两个以上的单词合成一个新的单词的构词法叫做合成法。以合成法构成的单词称作合成词,包括合成名词、合成动词、合成形容词、合成副词等。合成名词例词enough

adlast

adv.最后adj.最后的合成形容词例词例词n.+n.adj.+n.v.+adv.adv.

+v.adj./num.+n.+edn./adv.+分词n.+adj.adj.+n.adj.+分词num.+n.+adj.合成动词合成副词合成介词合成代词newspaper,airportgreenhouse,highway,mainlandbreakdown,feedbackoutbreak,outputwarm-hearted,three-leggedmeat-eating,snow-coveredworld-famous,snow-whitefull-time,second-handgood-looking,easy-going200-meter-long,18-year-oldupset,overcome,oversleepforward,foreveroutside,withoutoneself,everythingReadandpractise构词法例词派生amazing,replace,natural,environmental,surprisingly,certainly,slowly,quietly,clearly,wisely1.Thefactory’s

(pollute)iscausingharmtotheenvironment.2.Thewaterispolluted.Itis

(safe)todrink.3.Electronic

(waste)isalso

(harm)totheenvironment.4.Theburningofoilforenergyisoneofthemaincausesof

(green,house)gases.pollutionunsafewasteharmfulgreenhouse派生转化合成amazing,replace,natural,environmental,surprisingly,certainly,slowly,quietly,clearly,wiselyuse,name,mistaketoothbrushReadandanswerWhatcanyouseeinthepicture?Icanseemanycarsontheroad.Theyproducealotofpollution.Whatdoyouthinkthepassageisabout?