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ModalVerbs1can/could1)HecanspeakFrench.Whenhewasyoung,hecouldsingverywell.4)Anyonecanmakemistakes.2)Couldyouplease……?Boyscan’twearlonghairinourclass.3)Howcanyoubesorude?can/beabletoLastnight,thefirespreadthroughthehotelveryquicklybuteveryone___________getout.wasableto2may/might1)---MayIuseyourpen?----yes,youmay.---No,youmustn’t.2)Itmay/mightraintomorrow.3)Mayallyourdreamscometrue.5)Canthisnewsbetrue?Thiscan’tbe**.Sheisintheoffice.4)may(might)aswelldo=hadbetterdo最好Thereisnothingtodo,soImayaswellgotobed.3must/haveto1)Wemustworkhard.Wehavetobeherebefore7:30.2)must----mustn’t----needn’t-MustIwatertheflowers?-yes,youmust.-No,youneedn’t/don’t’haveto.3)must+vcan’t+vHemustbeatthelibrary.4dare1情态动词dare-dareddaren’tDarehedoit?Hedarenotdoit.2)实义动词daretodoShedaredtowalkatnight.3)Idaresay5need1)Youneedn’tcallhim.2)–NeedIcome?--Yes,youmust.--No,youneedn’t/don’thaveto.Shedidn’tdare(to)…3)实义动词(sb)needtodo(sth)needtobedonedoing6will/would1)Wouldyoupassmethebook?2)Iwillneverdothatagain.3)Thiswillbethehousewearelookingfor.4)Fishwilldieoutofwater.Hewouldgetupearlywhenhelivedinthecountry.would/usedto①usedto可以表示过去的动作，现在已经不存在。Would常与表示过去的时间连用。②usedto可以表示过去的状态Iusedtogetupearly.Heusedtobeaquietboy.7shall/should/oughttoshall1）Whatshallwedonow？Shallshecomerightnow?在疑问句中，shall用于1，3人称，表示---------2）Youshalldoasyourfathersays.Heshallbepunished.(威胁）HeshallhavethebookwhenIfinishreading.(允诺）陈述句中，shall用于2，3人称，表-------------should1)Theyshouldarriveat7:30Itisnearly7o’clock.Heshouldbehereatanymoment.2)Youwon’tbelieveheshouldbesorude!HowshouldIknow?惊讶，“竟然会”３)Ifyoushouldchangeyourmind,pleaseletmeknow.oughttoTheyshould/oughttoarriveat7:30oughtnotto/oughtn’tto1.--Excuseme,butIwanttouseyourcomputertotypeareport.--You____havemycomputerifyoudon’ttakecareofit.A.shan’tB.mightnotC.needn’tD.shouldn’tA2.---WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.---They_____bereadyby12:00.A.canB.shouldC.mightD.needB3.Oneought____forwhatonehasn’tdone.A.nottobepunishedB.tonotbepunishedC.TonotpunishedD.notbepunishedA情态动词＋havedoneShemighthavegonetoShanghai.Itmusthaverainedlastnight.Itcan’thaverainedlastnight.Youneedn’thavewaitedforme.Youshouldhavestartedearlier.Yououghttohavehelpedhim.can’t/couldn’thavedonecouldhavedonemay/mighthavedonemusthavedoneneedn’thavedoneshould/oughttohavedone1.Withsomuchworkonhand,you____toseethegamelastnight.A.mustn’tgoB.couldhavegoneC.shouldn’tgoD.shouldn’thavegoneD2.Therewasplentyoftime.She____.A.mustn’thavehurriedB.couldn’thavehurriedC.mustnothurryD.needn’thavehurried3.Acomputer____thinkforitself;itmustbetoldwhattodo.A.can’tB.couldn’tC.maynotD.mightnotDA情态动词表示推测的用法1对现在情况的推测肯定must,may,mightbe否定can,couldnotbe2对过去事实的推测肯定must/may/mighthavedone否定can,couldnothavedone疑问can,couldbe?疑问can,couldhavedone虚拟would/could/should/might/..havedone