天津市宝坻区大白庄高级中学高中英语（外研版选修八）配套学练稿：MODULE6LGRAMMAR2.doc

1、TeachingGoals:1. LearntherulesofModalVerbs.2. TraintheuseofModalVerbs.Teachingmethods:Step1.情态动词的定义：情态动词有一定的词义，表示某种感情和语气，但不能单独作谓语，要和其他动词一起构成谓语。一般具备以下特点：1）有词义2）没有人称和数的变化3）后面必须跟动词原形。Step2.情态动词用法归纳一、can,could与beableto1.表示能力（体力、知识、技能）。1).Canyouliftthisheavybox?（体力）2).Marycanspeakthreelanguages.（知识）3).Ca

2、nyouskate?（技能）注意：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。Illnotbeabletocomethisafternoon.当表示“经过努力才得以做成功某事”时应用_不能用Can。Hewasabletogotothepartyyesterdayeveninginspiteoftheheavyrain.2.表示请求和允许。-CanIgonow?-Yes,youcan./No,youcant.此时可与may互换。在疑问句中还可用_,_代替，不是过去式，只是_，不能用于肯定句和答语中。-CouldIcometoseeyoutom

3、orrow?-Yes,youcan.(No,Imafraidnot.)3.表示客观可能性（客观原因形成的能力）。Theyvechangedthetimetable,sowecangobybusinstead.Thishallcanhold500peopleatleast.4.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。Canthisbetrue?Thiscantbedonebyhim.Howcanthisbetrue?二、may,might1.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”。-Mig

4、ht/MayIsmokeinthisroom?-No,youmustnt.-May/MightItakethisbookoutoftheroom?-Yes,youcan.(No,youcant/mustnt.)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。2.用于祈使句，表示祝愿。Mayyousucceed!3.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。1).Hemay/mightbeverybusynow.2).Yourmothermay/mightnotknowthetruth.三、must,haveto1.表示必须、

5、必要。Youmustcomeintime.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）.-Mustwehandinourexercisebookstoday?-Yes,youmust.-No,youdonthaveto/youneednt.2.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。1).Hisplayisntinteresting,Ireallymustgonow.2).IhadtoworkwhenIwasyourage.3.表示推测、可能性（只用于肯

6、定的陈述句）1).YoureTomsgoodfriend,soyoumustknowwhathelikesbest.2).Yourmothermustbewaitingforyounow.四、dare,need1.dare作情态动词用时,常用于疑问句、否定句和条件从句中,过去式形式为dared。1).HowdareyousayImunfair?2).HedarentspeakEnglishbeforesuchacrowd,darehe?3).Ifwedarednotgotherethatday,wecouldntgetthebeautifulflowers.2.need作情态动词用时,常用于疑

7、问句、否定句。在肯定句中一般用must,haveto,oughtto,should代替。1).Youneedntcomesoearly.2).-NeedIfinishtheworktoday?-Yes,youmust./No,youneednt.3.dare和need作实义动词用时，有人称、时态和数的变化。在肯定句中，dare后面常接带to的不定式。在疑问句和否定句中，dare后面可接带to或不带to的不定式。而need后面只能接带to的不定式。1).Idaretoswimacrossthisriver.2).Hedoesntdare(to)answer.3).Heneedstofinishh

8、ishomeworktoday.五、shall,should1.shall用于第一人称，征求对方的意见。Whatshallwedothisevening?2.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。1).Youshallfailifyoudontworkhard.(警告)2).HeshallhavethebookwhenIfinishit.(允诺)3).Heshallbepunished.(威胁)4).YoushalldoasIsay.(命令)5).should,表示义务或责任常译为应该。Youshouldnotbreakyourpromise.Imsorryth

9、atheshouldbesoimpolite(感情色彩)六、will,would1.表示请求、建议等，would更委婉。Will/Wouldyoupassmetheball,please?2.表示意志、愿望和决心。1).Iwillneverdothatagain.2).Theyaskedhimifhewouldgoabroad.3.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。1).Duringthevacation,hewouldvisitmeeveryotherday.2).Thewoundwouldnotheal.4

10、.表示估计和猜想。Itwouldbeabouttenoclockwhenshelefthome.装订线1.We_haveboughtsomuchfoodnowthatSiziewontbewithusfordinner.A.maynotB.needntC.cantD.mustnt2.We_thedifficultytogether,butwhydidntyoutellme?A.shouldfaceB.mightfaceC.couldhavefaceD.musthaveface3.Itsquitewarmhere:we_turntheheatingonyet.A.couldntB.mustntC

11、.needntD.wouldnt4.Althoughthis_soundlikeasimpletask,greatcareisneeded.A.mustB.mayC.shallD.should5.Itissurprisingthathe_havebeensofoolish;henevermadesuchamistake.A.mustB.couldC.shouldD.might6.Heresnolighton;they_beathome.A.cantB.mustntC.needntD.shouldnt7.Theman_gooutforawalkaftersupperwhenhewasyoung.

12、A.wouldB.mustC.mightD.should8.You_behungryalreadyyouhadlunchonlytwohoursago.A.wouldntB.cantC.mustntD.neednt9.-MayItakethisbookoutofthereadingroom?-No,you_.Youreaditinhere.A.mightntB.wontC.needntD.mustnt10.John,lookatthetime_youplaythepianoatsuchalatehour?A.MustB.CanC.MayD.Need11.Excuseme,butIwanttou

13、seyourcomputertotypeareport.-You_havemycomputerifyoudonttakecareofit.A.shantB.mightnotC.needntD.shouldnt12.-IdontreallylikeJames.Whydidyouinvitehim?-Dontworry.He_come.Hesaidhewasntcertainwhathisplanswere.A.mustnotB.neednotC.wouldnotD.mightnot13.ShallIinformhimofthechangeoftheschedulerightnow?-Iamafr

14、aidyou_,incasehecomeslateforthemeeting.A.willB.mustC.mayD.can14.I_worryaboutmyweekend-Ialwayshavemyplansreadybeforeitcomes.A.cantB.mustntC.darentD.neednt15.Justbepatient.You_expecttheworldtochangesosoon.装订线A.cantB.needntC.maynotD.willnot1.We_haveboughtsomuchfoodnowthatSiziewontbewithusfordinner.A.ma

15、ynotB.needntC.cantD.mustnt2.We_thedifficultytogether,butwhydidntyoutellme?A.shouldfaceB.mightfaceC.couldhavefaceD.musthaveface3.Itsquitewarmhere:we_turntheheatingonyet.A.couldntB.mustntC.needntD.wouldnt4.Althoughthis_soundlikeasimpletask,greatcareisneeded.A.mustB.mayC.shallD.should5.Itissurprisingth

16、athe_havebeensofoolish;henevermadesuchamistake.A.mustB.couldC.shouldD.might6.Heresnolighton;they_beathome.A.cantB.mustntC.needntD.shouldnt7.Theman_gooutforawalkaftersupperwhenhewasyoung.A.wouldB.mustC.mightD.should8.You_behungryalreadyyouhadlunchonlytwohoursago.A.wouldntB.cantC.mustntD.neednt9.-MayI

17、takethisbookoutofthereadingroom?-No,you_.Youreaditinhere.A.mightntB.wontC.needntD.mustnt10.John,lookatthetime_youplaythepianoatsuchalatehour?A.MustB.CanC.MayD.Need11.Excuseme,butIwanttouseyourcomputertotypeareport.-You_havemycomputerifyoudonttakecareofit.A.shantB.mightnotC.needntD.shouldnt12.-Idontr

18、eallylikeJames.Whydidyouinvitehim?-Dontworry.He_come.Hesaidhewasntcertainwhathisplanswere.A.mustnotB.neednotC.wouldnotD.mightnot13.ShallIinformhimofthechangeoftheschedulerightnow?-Iamafraidyou_,incasehecomeslateforthemeeting.A.willB.mustC.mayD.can14.I_worryaboutmyweekend-Ialwayshavemyplansreadybeforeitcomes.A.cantB.mustntC.darentD.neednt15.Justbepatient.You_expecttheworldtochangesosoon.A.cantB.needntC.maynotD.willnot