SectionA 课件2（人教版新目标）.ppt

,英语教学课件系列,Go,for,it!,Unit 3Could you please clean your room?,Section A Grammar Focus,来源：,enjoy dinner with my family.,A:Mum,could I go out for dinner with my friends?B:Sure,that should be OK.,来源：,A:Could I get something to drink with my friends after the movie?B:Sure,you can.,A:Could I get something to drink with my friends after the movie?B:No,you cant,you have a basketball game tomorrow.,来源：,take the dog for a walk,遛狗,A:Can you please take the dog for a walk?B:OK,but I want to watch one show first.,take out the rubbish,扔垃圾,来源：,A:Can you please take out the rubbish?B:Yes,sure.,Grammar Focus,情态动词用法,只作情态动词的 can/could,may/might,ought to,must可情态可实义的 need,dare 可情态可助动词的 shall/should,will/would相当于情态动词的 have to,used to,情态动词的语法特征,1)情态动词不能单独做谓语,除ought和have外,后面只能接不带to的不定式。,2)情态动词没有人称,数的变化,但有些情态动词,如can、will也有一般式和过去式的变化。,3)情态动词的“时态”形式并不是时间区别的主要标志,不少情况下,情态动词的现在式形式和过去式形式都可用来表示现在时间、过去时间和将来时间。,1)can的主要用法是：A.表示体力或脑力的能力：e.g.The girl can dance very well.B.表示说话的推测事物的可能性等:e.g.Can the news be true?C.在口语中,can可以表示请求或允许:e.g.Can I sit here?,can 和could：,can表示“能够”时与短语be able to同义，但can只用于一般现在时或过去时，而后者可用于各种时态。另外，can表示个人有某种能力，而be able to表示某人通过努力、克服困难做成某事，相当于succeed in doing sth.；叙述过去事实时，最好用was/were able to，因为could只表示过去具有某种能力。,如：Can you understand the different kinds of English these people are using?Two years later,he was able to speak very good Chinese.,2)could的主要用法是：A.could 是can的过去式,表示与过去 有关的能力和推测:e.g.We all knew that the young man couldnt be a doctor.B.could可以代替can表示请求,但语气较can客气、委婉:,来源：,e.g.Could you lend me your dictionary?Could I use your bike?3)can和could接动词的完成形式，表示可能已经做某事。can用在否定和疑问句中,表示不相信、怀疑等态度。e.g.They cant have gone out because the light is still on.,以could或would提问时，不能再以could或would作答，而应该用can或will。如：Could I borrow your dictionary?Yes,of course you can.,情态动词用法小结1.情态动词不能表示正在发生或已经发生的事情,只表示期待或估计某事的发生。2.情态动词除ought 和have 外,后面只能接不带to 的不定式。,3.情态动词没有人称，数的变化，即情态动词第三人称单数不加-s。4.情态动词没有非谓语形式，即没有不定式、分词等形式。,could与can的区别 could与can都是情态动词,could是can的过去式。二者都可用于表示请求,但是用法稍有不同。,can 表示一般性的请求，语气随便,常用于熟人之间或长辈对晚辈,上级对下级的场合。e.g.Can you tell us your story,Tony?Tony，你能给我们讲讲你的故事吗？,could表示有礼貌的请求，语气委婉，常用于非熟人之间或晚辈对长辈，下级 对上级的场合。比如：-Could you tell us if it snows in winter in Australia?-Sure.-请告诉我们,澳大利亚冬天下雪吗?-当然可以。,注意：1.提出委婉的请求在回答中不可用could。A:Could I have the television on?B:Yes,you can./No,you cant.2.在否定、疑问句中表示推测或怀疑用couldnt。He couldnt be a bad man.他不大可能是坏人。,may和might 表示允许或请求;表示没有把握的推测;may放在句首,表示祝愿。May God bless you!He might be at home.注意:might 表示推测时,不表示时态，只是可能性比may小。,1.两词都是“必须”的意思,have to 表示客观的需要,must 表示 说话人主观上的看法,既主观 上的必要。,have to和must,My brother was very ill,so I had to call the doctor in the middle of the night.我弟弟病得很厉害，我只得半夜里把医生请来。(客观上需要做这件事)He said that they must work hard.他说他们必须努力工作。(主观上要做这件事),2.have to 有人称、数、时态的变化,而must只有一种形式。但must 可用于间接引语中表示过去的必要或义务。He had to look after his sister yesterday.,3.在否定结构中:dont have to 表示“不必”,mustnt 表示“禁止”。You dont have to tell him about it.你不一定要把此事告诉他。You mustnt tell him about it.你一定不要把这件事告诉他。,4a.Write R for requests and P for permissions.Then match each one with the correct response.,_ Could I hang out with my friends after the movie?2._Could you please pass me the salt?3._Could I borrow that book?4._Could you help me do the dishes?5._Could you lend me some money?,P,R,P,R,R,Yes,here you are.Hmm.How much do you need?Yes,sure.No problem.I finished reading it last night.d.Yes,but dont come back too late.e.No,I cant I cut my finger and Im trying not to get it wet.,1d 2-a 3-c 4-e 5-b,4b Fill in the blanks in the conversation,A:I hate to_ chores.B:Well,I hate some chores too,but I like other chores.A:Really?Great!_I ask you to_ me with some chores then?B:What do you need help with?A:_ you please _my clothes for me?B:I dont want to do that!Its boring!,Could,do,help,Could,fold,A:OK.Then_ you _do the dishes for me?B:Sure,no problem.But_ we go to the movies after that?A:Sure,Ill finish my homework while you help me with the dishes.Then we can go to the movies.,could,please,could,4c Make a list of things your group needs to do for a camping trip.Then discuss who will do bring a tent them and complete the chart.,A:Could you please bring Liu Chang?B:Sure.And could you please?C:Sorry,I cant.I have to,Pair work,用情态动词can/could,cant,may,must,mustnt,neednt填空。1.-_ you come and play with us now?-Im afraid I _.I _ do the cooking.I _ come later.2.-_ we clean the windows today?-No,you _.You _ clean them tomorrow.,Could,cant,must,can,Must,neednt,can,3.-_ I watch TV this evening,mum?-No,you _.Work _ come first.4.-_ I come in,please?-Yes,please.5.Excuse me._ you tell me the way to the cinema?,May,mustnt,must,Can,Can,A:Could you help me,please?B:_!A:I want to _these boxes to my home Lets _ the boxes _ the car now.B:_right.A:Oh,the box _ heavy.Can you carry it?B:Yes,I_A:_you _ it to my room?B:Certainly.,完成对话,Certainly,take,put,in,All,is,can,Could,take,can;couldWhen I was young I _ climb any tree in the forest.Learning a language _ be a real challenge.,could,can,选用正确的情态动词填空。,Homework,这个暑假你与父母要去法国去度假，你的宠物小猫Mimi需要请Jimmy帮忙照顾。请用下面的提示词给Jimmy写份留言。take care of,take for a walk,feed and give some water,play with him,cleanDear Jimmy,_.Li Ming,Thank You!,