外研版九年级英语上册Module12 Unit3教学课件

Module12SaveourworldUnit3

Languageinuse·上册·语法聚焦构词法在初中阶段,我们主要学习三种构词法：合成法、派生法、转化法。构词法举例合成法：把两个或两个以上独立且语义不同的单词合在一起,构成一个新词,这种构词法叫合成法。合成法可以合成名词、形容词、副词、代词、动词等home+work→homeworkhard+working→hard-workingdown+load→download构词法举例派生法：派生法也叫前缀、后缀构词法,即由一个词根加上前缀或后缀构成一个新词的构成方法1.前缀添加在词根前的构词部分叫前缀,多数情况下它不改变原词的词性。常见的前缀有以下几种：（1）im-,un-,in-,dis-,non-等表示否定（2）re-表示“重复”（3）mis-表示“错误地”（4）anti-表示“反对；防止”（5）inter-表示“相互；交互；在……之间”（1）possible→impossible,happy→unhappy,correct→incorrect,agree→disagree,smoker→nonsmoker（2）build→rebuild,use→reuse,cycle→recycle,write→rewrite（3）understand→misunderstand（4）war→antiwar（5）national→international构词法举例2.后缀添加在词根后的构词部分叫后缀,多数情况下它改变原词的词性。常见的后缀有以下几种：（1）名词后缀：-er,-or,-ist,-tion,-ment等（2）形容词后缀：-ful,-less,-able等（3）副词后缀：-ly（4）数词后缀：-th,-teen,-ty等（1）read→reader,visit→visitor,piano→pianist,suggest→suggestion,develop→development（2）care→careful,use→useless,believe→believable（3）slow→slowly（4）four→fourth,fourteen,forty构词法举例转化法：转化法是指将一种词性转化为另一种词性而词形不变的方法，转化后的词其意义往往与之前的联系密切。常见的有动词转化为名词、名词转化为动词、形容词转化为动词等ridev.骑；乘→n.骑马；乘车recordn.最佳纪录→v.记录clearadj.（天气）晴朗的→v.（烟雾等）开始消失

一、单项填空（）1.Be_____whenyoucrossthestreet.A.careful

B.carefully

C.careA（）2.Themanlooked_____athisbrotherwhenhewasbadlywounded.

A.sadly

B.sadness

C.sad（）3.Whentheteacherpraisedhimforworkingoutthephysicsproblem,Tomlooked_____.

A.proudly

B.pride

C.proudAC（）4.Therewere_____fishintheriverinSouthAmerica.A.dangerB.dangerousC.endanger（）5.Canyouwritea_____passageinEnglish?A.600wordsB.600-wordsC.600-wordBC二、用所给单词的适当形式填空6.Tomthinkspeoplewillhelphimifheasksforhelp__________（polite）.7.Catsandmicehavealwaysbeen__________（nature）enemies.8.Howthosepeopledeeplyinfluencedbywarswishtolive__________（peaceful）!politelynaturalpeacefully9.Itis_______________（possible）tocleanupthewholeriverinsuchashorttime.10.MaryisillagainandIthinksheisalittle________________（health）.impossibleunhealthy课堂小测一、用方框内所给单词的适当形式填空1.Thepopulationinthatcountrygrows__________.2.Whynotcoverthisdeskwithapieceof__________?3.Inorder________________pollution,weshoulddriveless.reduce,rapid,step,reuse,clothrapidlyclothtoreduce4.Thefollowing__________areusefulforEnglishlearners.5._____________thewasteismuchbetterthanburningit.reduce,rapid,step,reuse,clothstepsReusing二、根据汉语意思完成句子，每空一词6.爸爸的办公室里总有大量的废纸。There’salways____________________scrappaperinDad’soffice.7.白线把赛区分成几个部分。Whitelines__________theplayingarea_________severalsections.tons/lotsofdivideinto8.你知道如何把水变成冰吗？Doyouknowhowto________________________________________?9.睡觉前请关上电视。Please______________theTVbeforeyougotobed.10.她会打篮球，也会打网球。Shecanplaybasketballandtennis______________.changewaterchangeiceturnoffaswell三、语法选择Myfathertoldmethatthereusedtobeaforestnearourtown.Butthefarmerwho_____11_____theforestcuttreeseveryyearuntiltherewerenotreesleft.（）11.A.owned

B.owns

C.willownA

Oneday，ourteachertookusoutand_____12_____hadapicnicinthefieldwheretheforestusedtobe.Oneofmyclassmates，whocomesfromatribe（部落）thatlivedinthewestofourcountry,toldus_____13_____hethoughtaboutthechange.（）12.A.us

B.our

C.we（）13.A.whenB.which

C.whatCC“Itmakesmereally_____14_____tolearnthataforesthasdisappeared.Mypeoplealwayssaythatwhenwedosomethingtotheland，weshouldneverhurtit.Wemustcareaboutnatureandleaveitgoodenough_____15_____latergenerations（后代）.”（）14.A.sadness

B.sad

C.sadly（）15.A.of

B.for

C.throughBB

Whenweheardwhathesaid，wekeptsilentfirst.“Let’s_____16_____sometrees！”saidourteacherafteramoment.“Itwillbe_____17_____goodstart！”Sothat’swhatwedid.Fortherestofthespring，weworkedhard_____18_____weplantedthousandsoftrees.（）16.A.plant

B.toplant

C.planting（）17.A.the

B.an

C.a（）18.A.and

B.or

C.butACA

That_____19_____fiveyearsago.Today，whenIstandinthatfieldwhichwasoncebare（荒芜的），Iseetreesaboutas_____20_____asIam.It’sgreattoseehowwe’vechangedthefield.Ittaughtusthepowerofthinkingaboutthefuture.（）19.A.was

B.were

C.is（）20.A.taller

B.thetallest

C.tallAC四、短文填空DoyouplayAntForest？Itis_____21_____onlinegameonAlipay（支付宝）.Playerscollect“energy”by_____22_____somethingenvironmentally-friendly.Theycangrowandwater_____23_____own“trees”withthe“energy”._____24_____the“trees”arebigenough，Alipaywithsomeothercompanieswillplantrealtreesinthedesert（沙漠）areaofChina.Everyyearmillionsoftreesare_____25_____inthisway.andoingtheirWhenplanted

ThisispartofChina’stree-plantingprogram.Ithopesto___26___thedesertfrombecominglarger.Since1978，Chinahasplantedover66billiontrees___27___thenorth.Itisknownas“the