九年级下册课件M4-U3.ppt

英语教学课件,外研九年级下册,Unit3,Languageinuse,Module4Rulesandsuggestions,1.Tosummariseandconsolidatetheuseofmodalverbs2.Toknowmorerulesofeco-tourism,情态动词,Areyoufamiliarwiththesesentences?Theyareallfromthismodule.,Observe,1.Youmustbecarefuloffallingstones.2.Youmustntwalktooclosetotheedgeofthehillpathbecauseyoumightfallandhurtyourselves.3.Youshouldalwayswearproperclothes.4.Bearsmightthinkourrubbishisfood.5.Canwegorockclimbing?No,youcant.,6.Youmustntgooffonyourown.7.Youmayneedsomewater.8.Weshouldhangthefoodinatreetonight.9.Theycansmellfoodfromalongwayaway.10.Bearsmightthinkourrubbishisfood.11.Noonecanrunfasterintheforestthanabear.12.Youmustntmakeanysuddenmovesormakeasound.Andaboveall,youmustntrun.,1.You_becarefuloffallingstones.2.You_(not)walktooclosetotheedgeofthehillpathbecauseyou_fallandhurtyourselves.3.You_alwayswearproperclothes.4.Bears_thinkourrubbishisfood.5._wegorockclimbing?No,you_(not).6.You_(not)gooffonyourown.,must,mustnt,might,should,might,Can,cant,mustnt,go,Ready?,7.You_needsomewater.8.We_hangthefoodinatreetonight.9.They_smellfoodfromalongwayaway.10.Bears_thinkourrubbishisfood.11.Noone_runfasterintheforestthanabear.12.You_(not)makeanysuddenmovesormakeasound.Andaboveall,you_(not)run.,may,should,can,might,can,mustnt,mustnt,以上我们已经通过归纳总结和练习对本课的语法内容有了一定的了解,下面就让我们根据之前练习的考察情况进一步选择讲解该语法项的重难点。,语法讲解,情态动词本身有一定的意义，但不能独立作谓语，只能与其后的动词原形一起构成谓语，表示说话人的情绪、态度或语气，用来表达建议、请求、可能或意愿等。情态动词没有人称和数的变化，情态动词后必须跟动词原形。常见的情态动词有：can,could,may,might,must,need,shall,will,should,would。,情态动词,Canyouliftthisheavybox?(体力)Marycanspeakthreelanguages.(知识)Canyouskate?(技能),can,could,此时可用beableto代替。can只有一般现在时和一般过去式;而beableto则有更多的时态。,表示能力(体力,知识,技能),常用情态动词can和could表达。,如：Illnotbeabletocomethisafternoon.(一般将来时)Hewasabletogotothepartyyesterdayeveninginspiteoftheheavyrain.,当表示“经过努力才得以做成功某事”时用beableto,不能用can。如：,CanIgonow?Yes,youcan./No,youcant.CouldIcometoseeyoutomorrow?Yes,youcan.(No,Imafraidnot.),此时可与may互换。在疑问句中还可用could,might代替，但could,might并不表示过去式，只是语气更委婉。它们不能用于肯定句和答语中。如：,表示请求和允许。如：,Theyvechangedthetimetable,sowecangobybusinstead.Thishallcanhold500peopleatleast.,表示客观可能性(客观原因形成的能力)。如：,Canthisbetrue?Thiscantbedonebyhim.Howcanthisbetrue?,表示推测(惊讶、怀疑、不相信的态度)，用于疑问句、否定句和感叹句中。,Might/MayIsmokeinthisroom?No,youmustnt.May/MightItakethisbookoutoftheroom?Yes,youcan.(No,youcant/mustnt.),may,might,用MayI.？征徇对方许可时比较正式和客气，而用CanI.？在口语中更常见。,表示请求和允许。might比may语气更委婉，而不是过去式。否定回答时可用cant或mustnt，表示“不可以，禁止”。如：,Mayyousucceed!Hemay/mightbeverybusynow.Yourmothermay/mightnotknowthetruth.,用于祈使句，表示祝愿。如：,表示推测、可能性(不用于疑问句)。might不是过去式，它所表示的可能性比may小。如：,Youmustcomeintime.Mustwehandinourexercisebookstoday?Yes,youmust.No,youdonthaveto/youneednt.,must,haveto,在回答引出的问句时,如果是否定的，不能用mustnt(禁止,不准)，而用neednt,donthaveto(不必)。,表示命令、禁止、不得不。如：,Hisplayisntinteresting,Ireallymustgonow.IhadtoworkwhenIwasyourage.,YoureTomsgoodfriend,soyoumustknowwhathelikesbest.Yourmothermustbewaitingforyounow.,must是说话人的主观看法，而haveto则强调客观需要。must只有一般现在时，haveto有更多的时态形式。如：,表示推测、可能性（只用于肯定的陈述句)。如：,Youshallfailifyoudontworkhard.(警告)HeshallhavethebookwhenIfinishit.(允诺)Heshallbepunished.(威胁),shall,should,shall用于第二、三人称，表示说话人给对方的命令、警告、允诺或威胁。,shall用于第一人称，征求对方的意见。如：,Whatshallwedothisevening?,Will/Wouldyoupassmetheball,please?Iwillneverdothatagain.Theyaskedhimifhewouldgoabroad.,will,would,表示意志、愿望和决心。如：,表示请求、建议等，would更委婉。如:,Duringthevacation,hewouldvisitmeeveryotherday.Thewoundwouldnotheal.Itwouldbeabouttenoclockwhenshelefthome.,would表示过去反复发生的动作或某种倾向。would表示过去习惯时比usedto正式，且没有“现已无此习惯”的含义。如：,表示估计和猜想。如：,Ishouldhelpherbecausesheisintrouble.Yououghttotakecareofthebaby.,Youshould/oughttogotoclassrightaway.ShouldIopenthewindow?,should,oughtto,should,oughtto表示“应该”，oughtto表示义务或责任，比should语气重。,表示劝告、建议和命令。should,oughtto可通用，但在疑问句中常用should。,表示推测should/oughtto客观推测must主观推测,Hemustbehomebynow.(断定他已到家)Heoughtto/shouldbehomebynow.(不太肯定)Thisiswheretheoilmustbe.(直爽)Thisiswheretheoiloughtto/shouldbe.(含蓄),1.你必须马上回家。Youmustgohomenow.2.他一定吃过什么东西了。Hemusthaveeatensomething.3.吃饭之前不能吃零食。Youmustnteatsnacksbeforemeals.,Practice,4.我可以问你的名字吗？MayIaskyourname?5.你能用英语说吗？CanyouspeakinEnglish?6.我们应该准时去上学。Weshouldgotoschoolontime.7.你没有必要那么做。Youneedntdothat.,以下部分为课本练习，供老师在对答案时选择使用。,Matchthesignswiththerulesandwarning.,1,P30,a,b,c,d,e,f,pic,1Nosmoking.2Noeatingordrinking.3Childrencrossing.4Danger!Becarefuloffallingrocks.5Childrenshouldbetakencareofbyparents.6Donotdrinkanddrive.,Readthelistofrulesandwritesentencesusingmust,mustnt,shouldorshouldnt.,2,P31,Possibleanswers:Youmustcheckinatthemaingatewhenyoucometothecentre.Youshouldclimbwithsomeone/wearthecorrectclimbingshoes/wearcomfortableclothes.Youmustntclimbwithoutarope.Youshouldntlistentopersonalmusicplayerswhileclimbing.,Workinpairs.ExplainwhytherulesinActivity2areimportant.,3,P31,Whymustyoucheckinwhenyoucometothecentre?Becausetheywanttoknowwhoisthere.,1Whymustyouclimbwithsomeone?,Becauseyoucanaskforhelpifyoumeetsomeproblems.,2Whymustyouwearcomfortableclothes?,Becausecomfortableclothescanmakeyoulesstired.,3Whymustntyouclimbwithoutarope?,Becauseitisdangerousforyou.,4Whyshouldntyoulistentomusicwhileclimbing?,Becauseyoucanhearwhatisgoingonaroundyou.,Peoplearevery(1)_abouttheconditionsoftheancientforestsofCanadaandwanttosavethem.Manyvisitorstotheforestsuseknivestocuttheirnamesintothetrees,someofwhicharehundredsofyearsold.(2)_therearelitterbins,peoplestillthrowrubbishintothe(3)_andthiscausesplantsandfishtodie.Peoplefromlocalvillageshavehelpedcleanuptheforests.Wehope(4)_willplaytheirpartin(5)_Canadasforestscleantoo!,althoughkeepstreamtouristworry,worried,Although,stream,tourists,keeping,Completethepassagewiththecorrectformofthewordsinthebox.,4,P31,Youshould_.Youshouldnt_.Youmust_.Youmustnt_.,Nowwritepossiblerulesforvisitorstotheforests.,throwrubbishintothelitterbins,throwrubbishintothestream,helpsavetheancientforests,useknivestocutyournamesintothetrees,1.Comeandvisitme_youhavetime.2.Thewallismadeof_.3.Thepathtothetopisnotvery_.4.Remembertotakea_withyoutosleepin,becauseitmightrain.5.Heliftedupthe_andpointeditatthebear.6.Therewasa_noiseinthewoodsandweallstoppedmoving.7.Birdsusesmall_andleavestomakeahome.,gunsmoothsticksstonesuddententwhenever,whenever,stone,smooth,tent,gun,sudden,sticks,Completethesentenceswiththewordsinthebox.,5,P32,Readthepassageandanswerthequestions.,6,P32,1.WhatdoesZhangWenpengtrytosaywithhisdrawing?2.WhatdoesZhouZhiyuntrytosaywithhispainting?,Hetriestosaythatpeoplemustwakeuptothefactthatpollutioniscausingdamagetotheprogresswevemade.,Hetriestosaythatpeoplemustnotwasteelectricity.,3.Whatdoestheschoolsuggestthestudentsshoulddo?4.Howcanaschoolbecomea“greenschool”？,Theschoolsuggeststhatthestudentsshouldpassonwhattheyhavelearntinschooltotheirparentsandneighbours.,Aschoolmustincludeeducationabouttheenvironmentaspartofthetimetabletobecomea“greenschool”.,Listenandcompletethesentences.,7,P33,1.Thefirstthingyouhavetodoisto_carefully.2.Thinkaboutwhere_andwhetherthereare_.3.Youshouldonlytakemarked_.4.Makesureyouknowwhere_forlunch.5.Dontforgettotellpeopleto_forthepeople.6.dontwalkwhenitis_orin_.7.Youmustnottryouta_withagroup.,Summary,注:另附word文档。点击此处链接,单项选择。1.Studentsinourschool_knowshoutingisnotallowedinthelibrary.A.canB.mayC.mustD.need2.You_driveyourcarsofast.Itsverydangerous.A.wouldntB.shouldntC.couldntD.mightnt,3._IseeyourIDcard,sir?Wehavetocheckyourinformation.A.MayB.MustC.ShouldD.Need4