重庆市梁平实验中学高中英语 Unit1 Grammar课件2 重庆大学版必修3.ppt

whyistheroadsowet itmusthaverainedlastnight musthavedone对过去的非常肯定的推测 语气最强 对已发生的过去情况的推测 若陈述句谓语部分有 musthavedone 而且有表示过去的时间状语 问句部分用didn t 1 theymusthavegonetherelastnight didn tthey 2 theymusthavearrivedbynow haven tthey 对已发生的过去情况的推测 若陈述句谓语部分有 musthavedone 若没有表示过去的时间状语 问句部分用haven t或hasn t 3 hemusthavebeentothegreatwall hasn the 对已发生的过去情况的推测 若陈述句谓语部分有 musthavedone 若没有表示过去的时间状语 问句部分用haven t或hasn t 这个房间昨天肯定被清扫了 theroom yesterday musthavebeencleaned 他一定已经背了5000单词了 he 5 000words musthavelearnt youmusthaveseenthefilm journeytothewest haven tyou theymusthavebeentotheworldexpolastweek didn tthey a wherearethegirls couldtheyhavegonehome b no theycan thavegonehome it ssoearly canhavedone对过去的疑问推测 can thavedone对过去的否定推测 疑问句和否定句 whereisjohn canhehavegonetotheplayground no hecan thavegonetotheplaygrounditisraining mrking theletter 金先生已经收到那封信了吗 no he it 不 他不可能收到 can havereceived can thavereceived look thelightsareoffintheirroom wherehavetheygone theymighthavegonetothecinema may mighthavedone某事有可能发生过 表示对过去的不太肯定的推测 语气比musthavedone弱 用于肯定句和否定句 may的语气比might稍强 wheredidadamgetthatnewfootball hehasn tgotanymoney it apresent afterall itwashisbirthdaylastweek a mighthavebeenb mightbe he outbecausethelightwason a maynothavegoneb mayhavenotgonec maynotgod mustnothavegone a hereisadollforyourdaughter b thankyousomuch it sbeautiful butyouneedn thaveboughtit youhaveboughtsomanyforher needn thavedone本没有必要做某事 但此事已做 we theplantbecauseitrainedlastnight 本无必要 needn thavewatered oh i mnotfeelingwellinthestomach ishouldn thaveeatensomuchfriedchickenjustnow shouldn thavedone本不该做某事 但此事已做 表示责备 heshouldhaverepairedthebikeyesterday shouldhavedone本应该做某事 但此事未做 表示责备 你本应该先完成你的作业 you yourhomeworkfirst shouldhavefinished 你本不应该跟我撒谎 you tome shouldn thavelied could havedone 本能够 本可以做某事 但却没做他本能够按时完成这项任务的 he thetaskontime buthedidn tdoit couldhavefinished findingtherule believingwhathappenedinthepastisthecase usedonlyinpositivesentences itmusthaverainedlastnight indicatingthatsomethingwasapossibilityinthepast thoughitdidnotactuallyhappen negativeorinterrogativesentences suggestingthatitispossiblethatsomethinghappenedorwastrue usedonlyinpositive negativesentences theymighthavemistakenyou indicatingthatsomethingdidnot didhappen butthespeakerwishesithad not happened indicatingthatitisnotnecessaryforsb todosth thoughhe shedidit youneedn thavewateredtheplant itrainedlastnight 高考例析 1 sorryi mlate i haveturnedoffthealarmclockandgonebacktosleepagain 2000北京春季 a mightb shouldc cand will 答案为a 表推测的用法 句意 对不起 我迟到了 我 当时 兴许是关了闹钟又回去睡觉了 might相当于may 但语气更加不肯定 2 iwasreallyanxiousaboutyou you homewithoutaword 01全国 a mustn tleaveb shouldn thaveleftc couldn thaveleftd needn tleave 答案为b 虚拟语气用法 句意 我 那时 真地很担心你 你本不应该不留个话就离开家 3 i lltellmaryabouthernewjobtomorrow you herlastweek 04福建 a oughttotellb wouldhavetoldc musttelld shouldhavetold 答案为d 虚拟语气用法 句意 我明天要告诉她我的新工作的情况 你本应该上周告诉她 4 tomgraduatedfromcollegeataveryyoungage oh he havebeenaverysmartboythen 04全国iv a couldb shouldc mightd must 答案为d 表推测的用法 句意 汤姆很年轻的时候就大学毕业了 哦 他肯定是一个很聪明的男孩儿 5 he havecompletedhiswork otherwise hewouldn tbeenjoyinghimselfbytheseaside 05北京卷 a shouldb mustc wouldn td can t 答案为b 用法同4题 句意 他肯定做完了工作 不然他就不会在海边痛快地玩儿了 6 doyouknowwheredavidis icouldn tfindhimanywhere well he havegonefar hiscoat sstillhere 05湖北卷 a shouldn tb mustn tc can td wouldn t 答案为c 表推测的用法 句意 你知道大卫在哪儿吗 我哪儿也找不到他 瞧 他不可能走远 他的上衣还在这儿呢 can t相当与couldn t 但后者语气更加委婉 练习 thewomanbiologiststayedinafricastudyingwildanimalsfor13yearsbeforeshereturned oh dear she alotofdifficulties 05江苏卷 a maygothroughb mightgothroughc oughttohavegonethroughd musthavegonethrough 2 ihavelostoneofmygloves i itsomewhere 05北京春季 a mustdropb musthavedroppedc mustbedroppingd musthavebeendropped 3 mr white at8 30forthemeeting buthedidn tshowup 04广西 a shouldhavearrivedb shouldarrivec shouldhavehadarrivedd shouldbearriving4 hepaidforaseat whenhe haveenteredfree 05山东卷 a couldb wouldc mustd need 5 tomisneverlateforwork whyisheabsenttoday something tohim 05江西卷 a musthappenb shouldhavehappenedc couldhavehappenedd musthavehappened6 i havebeenmorethansixyearsoldwhentheaccidenthappened 05天津卷 a shouldn tb couldn tc mustn td needn t choosethebestanswerforeachblank 1 itoldhimthenewsjustnow really you him heknewitalready a shouldn thavetoldb mayhavetoldc needn thavetoldd couldn thavetold2 ican tfindmypenanywhere i it that simpossible isawyouwritingwithittenminutesago a mightloseb wouldhavelostc shouldhavelostd musthavelost c d 3 thatmustbejack itcan tbehim he withinsuchashorttime hesaidhewouldcallmeassoonashearrived mustn thavearrivedb shouldn thavearrivedc can thavearrivedd neednothavearrived4 wherearejoanandmary ithinkthey early a shouldhaveleftb musthaveleftc canhaveleftd needn thaveleft c b 5 didyouseethatcarnearlyhitme i killed yes itwasgoingsofast luckilyyourespondedquickly couldhavebeenb mayhavebeenc musthavebeend was b 6 mom iswepttheflooramomentago thankyou son butyou it it snotverydirtyyet a shouldhavesweptb needn thavesweptc mayhavesweptd canhaveswept7 it ssodrythesedays eventheplantisdead yes you itmorewater a willgiveb shouldhavegivenc maysendd canhavebeensent b b 8 johnpassedtheexam althoughhedidn tstudyverymuchforit theexam difficult a can thavebeenb musthavebeenc couldn tbed mighthavebeen9 iwonderwhytheyarelate they thetrain a canmissb mayhavemissedc couldmissd mightmiss a b 10 he tohelpusyesterday buthedidn t youmustforgivehim hewasillyesterday shouldhavecomeb couldhavecomec musthavecomed canhavecome a findandcorrectthemistakeineachofthefollowingsentences sheshouldhadfinishedtheworkthreedaysago 2 youarewetthrough youshouldhavebeencaughtintherain sheshouldhavefinishedtheworkthreedaysago youarewetthrough youmusthavebeencaughtintherain 3 imusthavehelpedthem butiwasn tableto 4 youmustn thaveseenthemoviebefore foritwasmadelastweek ishouldhavehelpedhim butiwasn tableto youcan thaveseenthemoviebefore foritwasmadelastweek 5 allthelightswereoffatelevenlastnight thestudentsmustn thaveb