1、情态动词不能单独作谓语，它必须和动词情态动词不能单独作谓语，它必须和动词原形连用一起构成谓语。原形连用一起构成谓语。一、情态动词的情态意义表示法一、情态动词的情态意义表示法考点一：考点一：can可表示现在或将来的能力，可表示现在或将来的能力，意为意为“能；会能；会”。can还可表示请求、允还可表示请求、允许，意为许，意为“可以可以”。如：如：Gabriella can speak French fluently.Can you help me lift this box?考点二：考点二：could可表示过去的能力；当可表示过去的能力；当could表示允许时，语气比表示允许时，语气比can更加委
2、婉更加委婉和客气。和客气。如：如：Could I have a drink of water,please?考点三：考点三：may表示请求、允许，意为表示请求、允许，意为“可可以以”。如：如：May I come in and wait?Thank you.You may go now.考点四：考点四：might表示允许时，语气比表示允许时，语气比may更更加委婉和客气。加委婉和客气。如：如：Might I borrow your pen?考点五：考点五：must表示义务、命令或必要，意表示义务、命令或必要，意为为“必须必须”，强调主观看法。，强调主观看法。mustnt表表示示“不不允许；禁止
3、允许；禁止”之意。之意。如：如：All passengers must wear seat belts.You mustnt talk to your mother like that.考点六：考点六：have to意为意为“不得不不得不”，强调客，强调客观观需要。需要。如：如：It is getting late.I have to go.考点七：考点七：should意为意为“应该应该”，既可以表示，既可以表示义义务或责任，还可以表示劝告或建议。其否定务或责任，还可以表示劝告或建议。其否定式为式为shouldnt，意为，意为“不应该不应该”。如：如：You should read his n
4、ew book.Its really interesting.Children shouldnt be allowed to play in the street.考点八：考点八：had better do sth.意为意为“最好做某最好做某事事”，其否定式在，其否定式在better后加后加not。如：如：Youd better(not)see the film yourself.考点九：考点九：need表示表示“需要需要”，作情态动词时，作情态动词时，通常用于否定句或疑问句中。通常用于否定句或疑问句中。【中考链接】【中考链接】1.Jenny finally got the job becau
5、se she _ speak English well.A.might B.must C.could(2015 广东佛山广东佛山)2.How do you usually go to school?My school is far away.I _ take the bus to school.A.must B.might C.have to(2015 山东菏泽山东菏泽)3.Its surprising that Mr.Mas little daughter _ speak English so well.A.must B.can C.mustnt D.cant(2015 重庆重庆A卷卷)4.
6、As middle school students,we _ be afraid of difficulties if we want to make our dreams come true.A.must B.shouldnt C.need(2015 黑龙江哈尔滨黑龙江哈尔滨)5.Cars,buses,bikes and people _ stop when the traffic lights are red.A.can B.may C.must(2015 四川成都四川成都)6._ I use your dictionary?Of course.But please return it t
7、o me before you leave.A.Must B.Need C.May(2015 湖南长沙湖南长沙)7.Mum,the train is leaving in eight minutes.I _ go now.Okay,Jim,call me when you get there.A.may B.must C.can(2015 四川乐山四川乐山)8.You _ return the book now.You can keep it until next week if you like.A.have to B.cant C.mustnt D.neednt(2015 山东青岛山东青岛
8、)9.You _ park here!Look at the sign,it says“No parking”.Sorry,I didnt notice that sign just now.A.wont B.neednt C.mustnt D.couldnt(2015 江苏苏州江苏苏州)二、情态动词表示推测二、情态动词表示推测考点一：考点一：can表示推测时常用于否定句表示推测时常用于否定句中，此时中，此时cant意为意为“不可能不可能”。如：如：That cant be his mother.Shes not that old.考点二：考点二：could常用于肯定句中，表示不常用于肯定句中
9、，表示不确定的推测，意为确定的推测，意为“可能可能”。如：如：You could be right,but I dont think you are.考点三：考点三：may表示推测，意为表示推测，意为“可能；也许可能；也许”。如：如：I may be late,so dont wait for me.考点四：考点四：might表示推测时，比表示推测时，比may的可能性的可能性更小。更小。如：如：She might not want to come with us,I guess.考点五：考点五：must表示推测时常用于肯定句中，表示推测时常用于肯定句中，表示很有把握的推测，意为表示很有把握的推
10、测，意为“一定一定”。如：如：The machine doesnt work.There must be something wrong with it.1.Look!It _ be David in the classroom.It _ be him.Because I saw him in the library a moment ago.A.may;mustnt B.must;cant C.can;cant D.mustnt;can(2015 四川广安四川广安)【中考链接】【中考链接】2.Harrys been driving all day he _ be tired.1.A.need
11、 2.B.can 3.C.shall 4.D.must(2015 浙江杭州浙江杭州)3.Look!The man at the gate _ be our headmaster.He is always standing there every morning.No,it _ be him.He is holding a meeting in the office now.A.must;cant B.must;mustnt C.cant;cant D.cant;mustnt(2015 山东滨州山东滨州)4.I have been to the moon twice.You _ be jokin
12、g!Its impossible!A.can B.may C.must D.need(2015 山东潍坊山东潍坊)5.Do you have any plans for this Sunday?Im not sure.I _ go to the countryside to see my grandmother.A.can B.must C.may D.need(2015 安徽安徽)6.Will Karen come to our party?She hasnt decided yet.She _ come.1.A.need 2.B.must 3.C.may 4.D.has to(2015 山
13、东聊城山东聊城)7.The green dictionary _ belong to _.Her name is on it.A.may,Carlas B.must,Carla C.cant,Carla D.must,Carlas(2015 四川南充四川南充)8.Do you have any plans for this summer vacation?Im not sure.I _ take a trip to Taiwan.A.must B.need C.may D.should(2015 江苏盐城江苏盐城)9.Life is changeable.No one knows what _
14、 happen in the future.A.should B.need C.have to D.might(2015 山东莱芜山东莱芜)三、情态动词一般疑问句的回答三、情态动词一般疑问句的回答考点一：考点一：may表示请求时，用于主语为表示请求时，用于主语为第一人称的一般疑问句中，其否定回答第一人称的一般疑问句中，其否定回答不用不用may not，而用，而用mustnt或或cant。如：如：May I use your glasses for a few minutes?No,you mustnt/cant.考点二：考点二：在回答由在回答由must引起的一般疑问句时引起的一般疑问句时,肯肯
15、定回答常用定回答常用must,否定回答常用否定回答常用neednt或或dont have to，表示，表示“不不必必”。如：如：Must we finish this project today?Yes,you must./No,you neednt/dont have to.考点三：在回答由考点三：在回答由need引起的一般疑问引起的一般疑问句时，肯定回答用句时，肯定回答用must，否定回答用，否定回答用neednt。如：如：Need I bring you a coat?Yes,you must./No,you neednt.考点四：在回答由考点四：在回答由could(表示委婉语气表示委婉
16、语气)引起的一般疑问句时，常用引起的一般疑问句时，常用can/cant回答。回答。1.Must I finish all the homework this evening?No,you _.Tomorrow is Saturday,and you have enough time for it.A.mustnt B.neednt C.wont D.cant(2015 江苏连云港江苏连云港)【中考链接】【中考链接】2.A:Mum,may I go out to play football for an hour?B:No,you _.The air outside is not very cl
17、ean.A.cant B.neednt C.couldnt(2015 贵州遵义贵州遵义)3.Must I hand in the exercise book today,Miss Green？No,you _.Take your time.Just tomorrow.A.shouldnt B.neednt C.mustnt D.cant(2015 四川内江四川内江)4.Must I sing the song in Russian?No,you _.Its up to you.A.mustnt B.cant C.dont D.neednt(2015 四川资阳四川资阳)5.Can you com
18、e to my party on Wednesday?Sorry,I _.I have a piano lesson.1.A.cant 2.B.couldnt C.mustnt(2015 黑龙江绥化黑龙江绥化)6._ I complete the composition today,sir?No,you neednt.You may _ tomorrow morning.1.A.Can,hand it in 2.B.May,hand in it C.Must,hand it in D.Need,hand in it(2015 山东烟台山东烟台)7.Could you please sweep the floor,Tom?Sorry,mum,I _.Im doing my homework.A.cant B.mustnt C.neednt D.may not(2015 湖北荆门湖北荆门)
