Unit5 Discovering Useful Structures 语法精讲课件

【版本：人教册别：必修三】

Discoveringusefulstructures:ExpressmodalityandtalkaboutfutureeventsinthepastUnit5TheValueofMoneycontentsⅠ

LanguagepointsⅡ

HomeworkⅢⅣⅤExperiencethefunctionsCompareandconcludeApplyandpracticeⅠExperiencethefunctionsRereadthepassageandpayattentiontotheusageoftheboldwords.Howmanymodalverbsdoyouknow?Andwhatarethey?may/mightmust/havetoshall/shouldwill/wouldoughttoneed/darecan/couldMindmapofthemodalverbs

modalverbsA.abilityorwill（能力或意愿）B.prohibition（禁止）C.makingsuggestions（建议）D.certaintyorinference（可能性或推断）E.politenessoreuphemism（客气或委婉）F.obligationsorexpectations（义务或预期）WeusemodalverbstotalkaboutChoosetheuseofmodalverbsinthefollowingsentences.1.Oliverbelievesthatwithamillion­poundbanknoteamancouldliveamonthinLondon.(

)2.Youngman,wouldyoustepinsideamoment,please？(

)3.Mayweaskwhatyou’redoinginthiscountryandwhatyourplansare?(

)4.Well,Ican’tsaythatIhaveanyplans.(

)5.Well,youmustn’tworryaboutthat.(

)6.Youmustn’tthinkwedon’tcareaboutyou.(

)7.Well,itmayseemluckytoyoubutnottome!(

)8.Nowifyou’llexcuseme,Ioughttobeonmyway.(

)9.Oh,no,you’dbetternotopenit.(

)能力或意愿客气或委婉客气或委婉能力或意愿禁止禁止可能性或推断义务或预期建议IICompareandconclude①Hecanusethecomputerskillfullynow,buthecouldn’tlastyear.②Trainingbyoneselfinagymcanbehighlydangerous.③—Can/CouldIhavealookatyournewpen?—Yes,youcan./No,youcan’t.④Thatcan’tbeMary—she’sinhospital.⑤Someoneisknockingatthedoor.Whocanitbe?⑥Youcan’t

becarefulenough.1.can和could(could是can的过去式，语气更委婉)(1)①句中can表示____________。(2)_______句中can表示可能性，可译为“有可能；有时会”。(3)③句中can表示____________。(4)____________句中can/could在否定句、疑问句中表示推测或怀疑，译为“____________”。(5)⑥句中can’t与____________或too连用，表示“再……也不为过”。能力②许可④⑤可能enough2.may和might①—MayIwatchTVaftersupper?—Yes,youmay./No,youmustn’t.②Theymay/might

behavingameeting,butI’mnotsure.③Ifthatisthecase,youmay/mightaswell

try.(1)①句中may表示______________________。否定回答时，用________。(2)②句中may和might表示_________，______可能性更小。(3)③句中______________________________，意为“不妨”。允许或征询对方许可mustn’t可能性mightmay/mightaswell＋

动词原形①Ihaveto

waitherebecauseIhavenoumbrellawithme.②Imust

recitethetextthismorning.③—Must

wehandinourexercisebookstoday?—Yes,youmust./No,youdon’thaveto/you

needn’t.④Youmustn’t

smokehere.⑤Yourmothermustbewaitingforyounow.⑥Why

mustyoualwaysinterruptme?①句中haveto和②句中must均表示“_______”，但_______是指说话人的主观看法，而___________则强调客观需要。(2)③句中must所构成的疑问句，回答的否定形式通常为_______________或_________，

意为“不必要”，而一般不说____________(④句中mustn’t表示“禁止”)。(3)______句中must常表示有根据的、比较确定的推测（只用于肯定的陈述句），译为

“一定；必定”。(4)⑥句中must表示“________________”。3.must与haveto必须musthavetoneedn’tdon’thavetomustn’t⑤偏要；偏偏①Allvisitorsshould/oughtto

registerwiththeBritishEmbassy.②Ifinditastonishingthatheshouldbesorudetoyou.③MrLeeaskedifheshouldgethisvisaontime.

④Youshouldhaveaskedforsomehelp.⑤You

shouldn’thavetold

herthenews.4.should和oughtto(1)①句中should表示“___________________”，其同义词是____________；在疑问句中，通常用_________代替oughtto。(2)②句中should有时可用于某些从句中，表示说话人惊奇、失望等感情色彩，常译为“______________”。(3)③句中should作为shall的过去式，用于第一、三人称作主语的疑问句，且多用于间接引语中，以______________。(4)④⑤句shouldhavedone表示“

”shouldn’thavedone表示“

”。义务、责任、建议oughttoshould竟然；怎么会征求意见本该做某事（而实际上未做）本不该做某事（而实际上做了）①Would

youpassmetheball,please?②Shesaidthatshewouldtryherbesttohelpus.③Eachtimehismother’sbirthdaycame,hewouldbuyherapresent.④Wewill

doourbesttosavethechild.

⑤Oilwillfloatonthewater.(1)①句中would表示_____________，比will更委婉客气。(2)②句中would和④句中的will表示____________________。(3)③句中would和⑤句中的will表示___________________________。5.will和would请求、建议意志、愿望和决心习惯性动作或客观真理Attention:

would表示过去的习惯性动作时，暗示现在仍然如此；

而usedto表示过去常常做某事，强调现在不是这样了。

Myfatherusedtogotoworkbybikewhenhewasyoung.

我父亲年轻的时候总是骑自行车去上班。（现在不是这样了）①Hesaidhewouldcometoseeme.②HetoldmehewouldgotoBeijing.

③Shesaidshewasgoingtostartatonce.④Iwastoldthattheyweregoingtoreturnhome.⑤Iwasgoingtotellhim,buthedidn’tgivemeachance.1.“would+动词原形”构成_______________，常表示________________。2.“was/weregoingto+动词原形”可表示根据_____________________。6.would和begoingtodo过去将来时主观意愿的将来计划或安排即将发生的事Attention:过去将来时表示从过去的某一时间来看将来要发生的动作或呈现的状态。过去将来时的出发点是过去，即从过去某一时刻看以后要发生的动作或状态。①Ifhedarego,I’llgowithhim.②Tomdidn’tdare

todoit.(1)dare作情态动词时，表示“__________”。常用于否定句和疑问句中，后接动词原形，否定形式为_________。(2)dare作实意动词时，有________________的变化，后面可接________________

。(3)dare作为实义动词，有如下搭配：

daretodosth

敢于做某事

daresb

todosth

激某人做某事 7.dare敢；

敢于darenot时态、人称和数带to的不定式①Youhadbetter

getsomesleep.②Youhadbetternot

talkwithstrangers.

hadbetter表示“____________”，使用时常缩写为____________，无人称和数的变化，其否定式一般把not放在hadbetter之______。8.hadbetter最好……’dbetter后ExerciseSometimessmilesaroundtheworld______befalse,hidingother

feelingslikeanger,fearorworry.2.You____________havetakensomuchcashwithyou,youknow—that

shopacceptedchecks.3.Accordingtothefactorysafetyrules,allaccidents______bereportedto

thesafetyofficer.4.I__________________(tell)him,buthedidn’tgivemeachance.5.Theyfearedthathe

(criticize)themiftheydispleasedhim.Completethesentenceswithsuitablemodalverbsorthecorrectformsoftheverbs.Addnotifnecessary.can

needn’t

shall

wasgoingto

tellwouldcriticize

6.You________beCarol.Youhaven’tchangedabitafteralltheseyears.7.Lifeisunpredictable;eventhepoorest__________becometherichest.8.Istillremembermyhappychildhoodwhenmymother_________takeme

toDisneylandatweekends.9.Itwassadtomethatthey,sopoorthemselves,_________bringmefood.10.Harryisfeelinguncomfortable.He___________________(drink)too

muchatthepartylastnight.mustmight

would

should

musthavedrunkExerciseExercise:Pleasetranslatethefollowingsentences.1.开车的时候再小心也不过分。Youcannotbetoocarefulwhiledrivingacar.=Youcan’tbecarefulenoughwhiledrivingacar.2.我认为他不可能出国了。我刚才还看见他了。Ithinkthathecouldn’t/can’thavegoneabroad.Isawhimjustnow.3.如果情况是那样，我们不妨一试。Ifthatisthecase,wemayaswelltry.4.我不敢独自一人去冬泳。Idarenotgowinterswimmingalone.5.无人敢提及此事。Noonedarespeakofit.ⅢApplyandpracticeFillintheblankswithsuitablemodalverbsintheboxaccordingtoyourunderstandingofthepassage.may,must,can,oughtto,might,hadbetter,would,shouldInthefilmTheMillionPoundBankNote,HenryAdamsisstuckinaforeigncountrywithoutmoneyandfriendandwithnowheretostay.Whilethissituation__________seemunusual,itcansometimeshappentotravelers.Incaseithappenstoyouonatripabroad,what_______youdo?First,andmostimportantly,you_____staycalm.Fear_________causeyoutobecomeconfused.Youneedtothinkclearly.Second,youshouldgotoyournearestconsulate.They_____beabletohelptosomeextent.Third,you_________dowelltocheckwithsomelocalcharities.They_____offerhelptotravelersinneed.Fourth,you________avoidgettingintotrouble.You_____thinkthatstealingsomemoneyorfoodwouldhelpyou,butyoushouldnotdoso.Gettingcaught______ruinyourlife.may/might

shouldmay/mighthadbetteroughttomustshouldwouldmightmightCompletethepassageswithsuitablemodalverbsorthecorrectformsoftheverbsinbrackets.Addnotifnecessary.Thesaying“Don’tjudgeabookbyitscover”meansthatwe____________jud