英语语法专项之情态动词cancouldmayshallshould（课件）通用版英语

情态动词1ModalVerbsCanyoutellmetheanswer?Yes,wecan.情态动词情态动词的概念Canyoutellmetheanswer?Youshouldgotobedbeforeten.MayIhavealook?Youmustkeepquietinthelibrary.Itisraining.Ihavetogohomenow....Shallwegotothecinematomorrow?can/may/shall/should表示话者对某一行为的态度和观点，主要包括揣测、判断、需要、可能、各种意愿等。情态动词的特征I/She/He/Sallycanmakeacake.You/Tomshouldcheckyourschoolbagbeforegoingtoschool.JohncouldspeakEnglishwhenhewasfiveyearsold.They/Hemightforgetthehomework.1.情态动词没有人称和数的变化3.情态动词不能单独使用，必须和动词原形连用构成谓语情态动词的用法can1.表示“能力”，翻译为“会”2.表示“许可”，翻译为“可以，允许”否定：cannot=can’tMickeycandriveacar.Youcan

goouttoplaynow.CanIborrowyourbook?出去玩吧！can’t1.表示“能力”，翻译为“不会、不能”2.表示“否定猜测”，翻译为“不可能”Rabbitscan’tswim.Davidcan’t

beinthelibrary.Isawhimhavelunchintheclassroomjustnow.canvscould1.在肯定句或否定句中，could即为can的过去式“委婉语气”Lily

couldspeakEnglishwhenshewas5yearsold.--CouldItryonthoseshoes?--Yes,youcan.Completethesentnecescanorcan’tcanorcan’tcan/could1.He_____speakalittleEnglishnow.2.She______playthepianowhenshewasfive.3.--______Iuseyourpen?--Yes,I____./No,I_____not.4.We______playtennisif（如果）itdoesn’trainhard.5._______yougivemeasuggestion（建议）aboutleaningEnglish?can/could/can’t/couldn’t1.I______gotothepartylastnightbecauseIwassick.2.A:______NoelcookItalianfood?B:Yes,he_______.3.Mysister_______swimlastyear,butnowshe_______.4.They______goshoppingyesterdaybecausethestorewasclosed.5.A:_______youreadwhenyouwerefouryearsold?B:Yes,I________.can/could/can’t/couldn’tcan/could/can’t/couldn’t11.Excuseme,I______hearyourightnow.Themusicistooloud.12.I______driveatruckwhenIwasonlysixteenyearsold.13.Douglashitthetreebecausehe_________stophiscar.14.Howmanyhotdogs______youeatatonetime?15.I________readwithoutmyreadingglasses.Wherearethey?情态动词的用法may2.表示猜测，翻译为“可能”否定：maynotItmayraintomorrow.可以吗？mayvscan1.在征求许可时，may比can的语气委婉May

Icheckyourbag?MayIborrowyourbike?mayvsmight1.在征求许可时，might比may的语气更委婉2.在表示猜测时，两者都解释为“可能”，但might的可能性更小MightIaskforyourtelephonenumber?Shemightbeverybusynow.You

might

beright.用may改写句子1.PerhapsJohnhasourtickets.Joanmayhaveourtickets.2.Perhapstheyworkattheweekend...............................3.Perhapssheisagooddriver.4.Perhapshedoesn’tlikechocolate.5.Perhapstheydon’tknowSpanish...........................................................................................6.PerhapsSallylendyousomemoney...............................表示“可能性”用may改写句子1.Youwanttogetanotherglassofjuice.MayIhaveanotherglassofjuice?..............................3.Youwanttobatheinthesea.4.Youwanttoborrowyourfriend’sring.5.Youwanttogoforawalk...........................................................................................6.Youwanttoeatsomesweets...............................表示征求许可用might的正确形式填空1.It’ssnowingtoday.It______________outside.3.Youaren’tacarefuldriver.You______________________oneday.4.Takeanumbrella.It___________________today.5.Becarefulwithmyneighbour’sdog.It________________you.6.Sheisill.She________________toourbirthdayparty.情态动词的用法shall1.用于征求对方的意见，用于主语是第一、三人称的疑问句否定：shallnotShallIturndownthemusic?Shallshewaitoutside?Shallwe...Ifeelveryhungry.Shallwe...Shallwe...Iwanttoseeagoodmovie.Shallwe...Shallwe...Shallwe...drivetoofastWouldyoulikehaveanyideasI’drathernot.WhataboutWhydon’twe情态动词的用法should建议或推测否定:shouldnotshouldn’tYoushould

listentoyourdoctor.Youshouldn’t

smokehere.Sheshouldbeintheofficenow.should/shouldn’tshould/shouldn’t1.Sheisreallysick.2.Heissotired.3.Iamveryhungry.4.Theyareveryangry.5.Ihaveabigtesttomorrow.6.Itwillrainlatertoday.7.Ilostmyshoes.a).Ishouldbringanumbrella.b).Theyshouldn’tfight.c).Ishouldbuynewones.d).Heshouldn’tplaymoresoccer.e).Ishouldstudytonight.f).Sheshouldtakemedicine.g).Ishouldeatsomefood.包含情态动词的句型转换肯定句：Youshouldgotobedbeforeten.否定句：Youshouldn'tgotobedbeforeten.一般疑问句：ShouldIgotobedbeforeten?Yes,youshould./No,youshouldn’t.特殊疑问句：（对划线部分提问）When

shouldI

gotobed?情态动词后+not情态动词放句首特殊疑问词+一般疑问句句型转换IcanspeakChinese.否定句一般疑问句特殊疑问句Ican’tspeakChinese.CanyouspeakChinese?WhocanspeakChinese?句型转换Sallyshouldvisitherdentisttwiceamonth.否定句一般疑问句特殊疑问句Sallyshouldn’tvisitherdentisttwicemonth.ShouldSallyvisitherdentisttwiceamonth.HowoftenshouldSallyvisitherdentist?句型转换ShecouldspeakfluentEnglishwhenshewastwelve.否定句一般疑问句特殊疑问句Shecouldn’tspeakfluentEnglishwhenshewastwelve.CouldshespeakfluentEnglishwhenshewastwelve.Whatcouldshedowhenshewastwelve?句型转换Visitorsshouldknockatthedoorbeforetheygetin.否定句一般疑问句特殊疑问句Visitorsshouldn’tknockatthedoorbeforetheygetin.Shouldvisitorsknockatthedoorbeforetheygetin?Whatshouldvisitorsdobeforetheygetin?综合练习canorcan’t圈出正确的答案禁止的圈出正确的答案用动词的适当形式填空1.Suziemight_________forthetesttonight.2.Lisamay__________becauseit’sherbestfriend’sbirthdaytomorrow.3.Clairemight____________becauseshedoesn’twanttocooktonight.4.Davidmay_________becauseit’scoldtoday.walkthedog,study,gotoarestaurant,buyapresent,cleanthehouse,wearahatandaacarf,visitagallery,stayinbed用动词的适当形式填空5.Erinmight_________inthepark.6.Kevinfeelssicksohemight_________.7.Taramight________tonightbecausehermumistired.8.Charleslikesartsohemight_________tonight.walkthedog,study,gotoarestaurant,buyapresent,cleanthehouse,wearahatandaacarf,visitagallery,stayinbednotsurefungocyclingGiveadvice1.Henrytalkstoomuch.Heshouldn’ttalksomuch.2.Johndrinkstoomuch.Johnshouldn’tdrinksomuch.3.KittywatchesTVtoooften.Sheshouldn’tdrinksomuch.4.Weeattoomuch.Weshouldn’teattoomuch.Giveadvice1.Theyeattoolittle.Theyshouldeatmore.2.Hedoesn’tsleepenough.Heshouldsleepmore.3.Joestudiestoolittle.Joeshouldstudymore.4.Idon’thelpmumenough.Youshouldhelpmummore.should/shouldn’t1.What_________(I/cook)fordinnertonight?2.You____________(wear)acoat.It’scoldoutside.3.We______________(arrive)theairporttwohoursbeforetheflight.4.DoyouthinkI_____________(apply申请)forthejob?5.Thestudents_____________(use)mobilephonesintheexam.6.You___________(be)soselfish.（自私的）Choosethebestanswer1.____youpleasetellmehowtogettothenearesthospital?A.Shall B.May C.Should D.Could