牛津深圳版英语七下Unit6ElectricityGrammar复习.pptx

Grammar can may must情态动词：can may must定义：定义：本身具有一定的词义，表示某种感情和语气。本身具有一定的词义，表示某种感情和语气。例句：例句：You cant do it like that.(责备责备)May I borrow your book?(请求请求)You must finsh your homework on time.(命令命令)can观察：I can swim.Can you swim?I cant/cannot swim,but I can ski.总结:1.can表示_.2.can 后面动词用_.3.can的否定形式是：_或_.4.一般疑问句是将can_.有能力做某事原形cantcannot提前Hi and Lo are talking about themselves.What are they saying?Read their conversation and then complete the statements below with Can or Cannot.P771.Hi _ play football.2.Lo _ paint.3.Hi _ speak as many languages as Lo.4.Both Hi and Lo _ dance.5.Lo _ drive a car,but he _ play chess.6.Hi _ swim,but he _ play the guitar.cancancancancannotcannotcannotcannotcan/may观察：总结：1：can/may表示：_和_.后接:_2:can的否定形式:_ may 的否定形式：_May/Can I use your mobile phone？Yes,you may/can.No,you may not/cant.You may/can turn on the TV.You may not/cannot play in the kitchen.请求请求允许允许原形原形cant/cannotmay notDaisy is not feeling well today.Benny is at home with her.Read their conversation below.Fill the blanks with may or can.P78Benny:Yes.I _._ I carry your bag for you?Daisy:Yes,you may.Thats so kind of you,Benny.Im ready to go._ you open the door for me?Benny:Yes,I can.Daisy:Thanks.MaycanCanBenny:How are you feeling,Daisy?Daisy:Not very well.Benny:_ I get you a chair?Daisy:Yes,thanks.Benny:Im going out._ I borrow your bicycle,Daisy?Daisy:Yes,you may.Before you go to meet your friends,can you come and see the doctor with me?MayMay/Cana.A man is going to see his boss.b.He is standing at the doorway.May I come in?What would he say if he wants to be polite?bossCome in,please.A student is going to ask the teacher a question.May I ask you a question?teacherSure.c.A boy is thirsty.He is asking his mother for something.May I have a glass of water?his mother Here you are.You enter a shop.The girl will say.May I help you?Id like to buy some.Youmust and must not观察：总结：1.must表示_和_.后接：_2.Must 提问，肯定回答：仍用_回答 否定回答：用_或_1.We must listen to Miss Li carefully.2.You must not/mustnt be late for class.3.Must I clean the blackboard now?Yes,you must.No,you neednt.No,you dont have to.命令命令禁止禁止原形原形must you needntyou dont have toDaisy saw a doctor.The doctor told her what to do and what not to do.Help her write down the doctors instructions.drink more water go to bed early eat cold food share cups with others go out alone take the medicine on time1.I must drink more water.2._3._4.I must not _5._6._I must go to bed early.I must take the medicine on time.eat cold food.I must not go out alone.I must not share cups with others.小结：can/may/must 共同点：1._2._3._不同之处：1.can表示_ may表示：_ must 表示：_2.can/may 提问遵循：_ must 提问,否定回答：_后面动词都用原形。后面动词都用原形。否定句都是后面加否定句都是后面加not一般疑问句都是将其提前一般疑问句都是将其提前有能力做某事/请求、允许请求请求/允许允许命令、命令、禁止禁止什么问，什么答什么问，什么答neednt/dont have to1.我会游泳但玛丽不会。我会游泳但玛丽不会。I _ _ but Mary _.2.我八点之前必须完成作业。我八点之前必须完成作业。I _ _ my homework before eight oclock.3.我可以借用你的自行车吗？我可以借用你的自行车吗？_ _ borrow?4.你不可以在这里打篮球。你不可以在这里打篮球。You _ _ _ here.5.-Must I stay here now?-_,you _.You _ leave now.can swim cant must finishMay I mustnt play basketballI.I.根据中文意思完成句子。根据中文意思完成句子。ExercisesNo neednt may/can AB can may mustcan/may/must的双面性观察：1.He may be Tom.Because he looks as tall as Tom.But I am not sure.2.-Can the story be true?-It cant be true.He lied.3.He must be at home.Look!The lights are on.总结：1.can/may/must还可以用来表示_.2.可能性由大到小的排序：_.3.must表示一定，其“不可能”是：_4.表示可能时，_不用于肯定句。推测推测 must-may/can cant can May he be Zhou Jielun?It _ be Zhou jielun.It _ be Jacky Cheng.duang!cant must Can she be Miss Li?She_ be Miss Li.Who must she be?She_ be Angela Baby.cant must Who may she be?Can she be Zhou Xun?情景剧A:I can play basketball.Can/May I play basketball here?B:No,you cant/may not.You mustnt play basketball in the cLassroom.You may hurt the classmates.You can/must play it on the playground.a basketball fan monitor(班长班长)a classmateat nightin the KTVon the wallon the paperat school.outside the schoolA:I can _.Can/May I _?B:No,you cant/may not.You mustnt _._ may/must_ You must/may_.【中考演练】(1)May I change the film here?(广州广州.2013)No,you_do that in the sunshine.A.neednt B.dont have to C.cant D.may not(2)-Listen!Somebody is singing in the next room.Who _ it be?Is it Meihua?(深圳深圳)-No.It _ be her.She is at school now.A.will,may not B.must,mustnt C.may,cant D.may,wont(3)-_ I take the newspaper away?-No,you mustnt.You_read it only here.(惠州惠州.2011)A.Must;can B.May;can C.Need;must D.Must;must(4)You_ go and see a doctor at once because youve got a fever.(上海上海)A.can B.must C.may D.could1.-May I watch TV,Dad?-No,you _.You must finish your homework first.A.mustnt B.may not C.couldnt D.might not2.-_ you carry the bag by yourself?-Yes,I can.A.Must B.Can C.Should D.May3.You _ throw rubbish everywhere.A.mustntB.cant C.may notD.couldnt II.II.单项选择。ABA4.-_ I borrow these magazines?-Sorry,only the magazines over there can be borrowed.A.NeedB.would C.Must D.May 5.Its the library!So you _ not shout here.A.mustB.can C.should D.may6.Many people like Jay Chou because he _ write and sing popular songs.A.mustB.can C.should D.mayDAB Use the following sentence“I can”to tell others your special ability.For example:I can hold my breath for two minutes.You will be given several situations.After reading the descriptions and looking at the pictures,decide what you would say in these situations.What do these signs mean?（You mustnt smoke here.）（You mustnt climb this ladder.）（You mustnt swim here.）（You mustnt use your mobile phone here.）may 表示许可或请求对方允许，意为表示许可或请求对方允许，意为“可可 以；可能；或许以；可能；或许”；否定形式为否定形式为may not,意为意为“不可以不可以”。除。除了了 may not 以外以外,cant、mustnt 都可以表都可以表 示示“不可以不可以”。但但mustnt 语气更强语气更强。may 构成的一般疑问句的回答形式为：构成的一般疑问句的回答形式为：May I.?Yes,you may./No,you may not.may be 和和 maybe 的区別的区別:may be 是是“情情态动词态动词+系动词系动词be”结构，表示结构，表示“可能是可能是”,maybe作副词；表作副词；表示示“大概；也许大概；也许”。例如：例如：He may be in the room./Maybe he is in the room.can/cannot are words to show our abilitiescan be able to 能，能力能，能力 e.g.我可以唱一首英语歌曲。我可以唱一首英语歌曲。I can/am able to sing an English song.过去式：过去式：could e.g.我十年前就能做到那样。我十年前就能做到那样。I could do that 10 years ago.否定式：否定式：cannot=cant can 用于一般现在（用于一般现在（can）、）、一般过去时态（一般过去时态（could）。）。be able to 用于一般现在（用于一般现在（am able to）、）、一般过去时态（一般过去时态（was/were able to）、）、一般将来时态一般将来时态（will be able to）。）。拓展拓展 （can与与 be able to 的区别）的区别）must be “肯定推测肯定推测”e.g.-What is Tom?-He must be a student.“否定推测否定推测”cant bee.g.-Where is Tom?-He cant be in the library.拓展拓展 (推测推测,可能可能)He is in the classroom.100%must 99%(must表推测，用于表推测，用于肯定句肯定句)e.g.He must be in the classroom.他肯定在他肯定在教教室。室。may 50%(may表推测，用于表推测，用于肯定句肯定句)e.g.He may be in the classroom.他可能在他可能在教教室。室。cant/couldnt (can/could表推测用于表推测用于否定句否定句)e.g.He cant be in the classroom.他不可能在教室。他不可能在教室。用本单元所学的情态动词填空。用本单元所学的情态动词填空。1.Kate,you have won the English competition!Oh,it _ be true.I made a lot of mistakes in it.2.You _ talk to your grandparents like that.Its impolite.3.We _ wash our hands before meals.It is good for our health.cantmustntmust4.Excuse me,_ you tell me the way to the nearest park?5.You _ go with us to the zoo if you want to.6.I _ speak Chinese very well,but I _ speak French at all.cancan/maycancant翻译下列句子。翻译下列句子。1.门锁了。他不可能在家。The door is locked.He _ be at home.2.我的手表停了。肯定有毛病。My watch doesnt work.There _ be something wrong with it.3.我可以借用你的尺子吗？当然可以。但是你必须明天还给我。_ I borrow your ruler?Of course.But you _ return it to me tomorrow.cantmustMaymust单项选择。单项选择。()1._ you help me with this maths problem?I _ not work it out.A.Can;mayB.Must;must C.Can;can D.May;may()2.The boy _ run very fast.He wants to be a top runner as Liu Xiang in the future.A.canB.cantC.mayD.may notCA()3.May I go to the cinema,Mum?Certainly.But you _ be back by 11 oclock.A.can B.may C.mustD.need()4.Must I finish the work before five oclock?No,you _.A.mustntB.neednt C.may not D.cant()5.You _ talk here.It is against the rules.A.mustnt B.must C.may not D.canCBA情态动词may 的用法：表示允许。may在表达这个意思时可以与can 互换使用。由may 引起的一般疑问句，其否定回答用_，_ 或_。表示请求时，could 和can 不表示时态的区别，只是could的语气更加委婉。may not cant/cannotmustnt