选修6模块1Period2:grammar,readingandwriting学习目标：知识与技能：复习情态动词完成式，掌握电子邮件写法过程与方法：复习巩固情感态度与价值观：熟练作题技巧，乐于动手，动脑重难点：NEED情态动词的应用和电子邮件的书写知识链接：情态动词用法学法指导：复习，动手学习过程：Ⅰ.didn'tneedtodo表示：__________________________________________needn'thavedone表示：__________________________________________JohnwenttothestationwiththecartomeetMary,soshedidn'tneedtowalkbackhome.约翰开车去车站接玛丽，所以她不必步行回家了。JohnwenttothestationwiththecartomeetMary,sosheneedn'thavewalkedbackhome.约翰开车去车站接玛丽，所以她本不必步行回家了(Mary步行回家没有遇上John的车。)典型例题Therewasplentyoftime.She___.A.mustn'thavehurriedB.couldn'thavehurriedC.mustnothurryD.needn'thavehurried答案D。needn'thavedone.意为"本不必"，即已经做了某事，而时实际上不必要。Mustn'thavedone用法不正确，对过去发生事情进行否定性推断应为couldn'thavedone,"不可能已经"。Ⅱ.情态动词+have+doneSomethingmayhavehappenedtoher.她可能发生了什么事情。Shemighthavehadanaccident.她或许遭受了意外.Soshemusthavetakenthattoo.因此，她肯定把它也带走了。1)这三句话都用了“情态动词＋不定式的完成时”，表示对发生过的事作某种猜测、推测。(1)musthavedone可用来对某件过去的事情作__________推测，表示“一定已经，想必已经”做过某事，用于肯定的陈述句中。否定句中用__________。Shemusthavereceivedtheparcel,Isentitbyregisteredpost.她一定已经收到包裹了，我是用挂号寄的。(2)mayhavedone,mighthavedone,couldhavedone“____________________”，就语气而言couldhavedone所表的可能性更小些。Hemay/might/couldhaveleftbynine.他可能于九点前已离去。(3)shouldhavedone/oughttohavedone表示“__________”但实际未做。Ishould/oughttohaveleftLondonbeforeninebutIdidn't.我本该在九点以前离开伦敦，但是我没有。(4)shouldn'thavedone/oughtn'ttohavedone表示“__________”，但实际上又做了。Heshouldn't/oughtn'ttohaveleftLondonbeforeninebuthedid.他本不该在九点前离开伦敦，但是他离开了。(5)can't/couldn'thavedone表否定推测，“__________”。Shecan't/couldn'thavegonetobed,forthelightinherroomisstillon.她不可能上床睡觉了，因为她房间的灯还亮着。(6)couldhavedone可表示客观上“____________________”。Hecouldhavefinishedtheworkintimebuthedidn'tworkhard.(7)Ineedn'thavegonetotheofficeyesterday(butIwentthere).昨天我没必要去办公室（但我却去了）。(8)mighthavedone还可表示过去“本1可能发生但实际上没有发生的动作”。用于表示说话人对已发生事提出批评或意见。Hemighthavegivenmorehelp,eventhoughhewasverybusy.即使他很忙，也可以多帮忙。Ⅲ.高考例析1.SorryI'mlate.I________haveturnedoffthealarmclockandgonebacktosleepagain.A.mightB.shouldC.canD.will2.Iwasreallyanxiousaboutyou.You_________homewithoutaword.（01全国）A.mustn'tleaveB.shouldn'thaveleftC.couldn'thaveleftD.needn'tleave3.—I’lltellMaryabouthernewjobtomorrow.—You________herlastweek.（04福建）A．oughttotellB．wouldhavetoldC．musttellD．shouldhavetold4.—Tomgraduatedfromcollegeataveryyoungage.—Oh,he______havebeenaverysmartboythen.（04全国IV）A.couldB.shouldC.mightD.must5.He_______havecompletedhiswork;otherwise,hewouldn'tbeenjoyinghimselfbytheseaside.A.shouldB.mustC.wouldn'tD.can't6.—DoyouknowwhereDavidis?Icouldn'tfindhimanywhere.—Well.Hehavegonefar—hiscoat'sstillhere.（05湖北卷）A．shouldn'tB．mustn'tC．can'tD．wouldn't7.—ThewomanbiologiststayedinAfricastudyingwildanimalsfor13yearsbeforeshereturned.—Oh,dear!She_______alotofdifficulties!(05江苏卷)A.maygothroughB.mightgothr...
