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单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,*,新目标 九年级,Unit 5,英语课件,Unit 5It must belong to Carla Section A Period 1,Guessing game,It,cant,be,可,能性0%,It,might/could,be,可能性20-80%,It,must,be,可能性100%,What kind of animal is it?,She,may,be.,No,I think she,could,be.,I know she,must,be,Who is the singer?,Pair work,A:,Whose football is,this?,B,:,Bills?,A:,It might be Bills.,Lets ask him.Bill,is this your football?,C,:,No,its not mine.,A:,Well,it isnt Bills.He says its,not his.,C,:,Is it Annas?,A:,Lets ask her.Anna,is this your,football?,C,:,No,it isnt.,A:,So its not Annas football.And,it cant be Marias.Because I,didnt take hers.Then whose,football is it?,B,:,Is it Lees?,A:,Yes,it doesnt belong to Bill,Anna or Maria.So it must be,Lees.,Listening and speaking(1b:P34),is her favorite author.,1.Janes little brother,toy car,He was the only little kid at the picnic.,2.Mary,book,Hemingway,listens to classical music.,3.Carla,volleyball,She loves volleyball.,4.Deng Wen,magazine,He loves cats.,5.Grace,CD,She always,Practise making conversations,Sample dialogue 1:,A,:,Look!Whose toy car,is this?,B,:It must be Janes little,brothers.Because he,was the only little kid,at the picnic.,Sample dialogue 2:,A,:Look!Whose,book is this?,B,:It must be Marys.,Because Hemingway,is her favorite,author.,Sample dialogue 3:,A,:Whose CD is this?,B,:It must be,Graces.Because,she always listens,to classical music.,Listening Practice(2a:P35),Things in the backpack,_,_,_,3._,hat,jacket,T-shirt,volleyball,CD,toy car,magazine,book,plate,cups,Listening Practice(2b:P35),1.The person,go to our school.,2.The person,be a boy.,3.It,be Meis hair band.,4.The hair band,belong to,Linda.,5.It,be Lindas backpack.,must,cant,could,might,must,Listening Practice(2c:P35),must/might,cant,might,must,might/must,must,cant,might,Check the answer:,1.The homework,cant be,Carols.She wasnt at school today.,考例,Look at the boy running on the ground.Is it Davis?,It _ be him.I saw him go to the teachers office just now.,mustB.cant,C.couldD.might(2007,湖北黄冈,),Language points,B,答案和解析,B,。,cant,表示否定的推,测；,must,表示肯定的推测；,could,might,表示可能的推测。,2.The French book,must be,Li Yings.,Shes the only one whos studying,French.,考例,Even the top students in our class didnt,work out the problem.So it _ be very,difficult.,A.needB.must,C.cantD.shouldnt(07,山东滨州,),解析,此处,must,表示肯定的推测。,B,Grammar Focus(P35),表示推测的情态动词,在英语中，表示对某件事物的确定程度，即表示推测的时候，我们通常会用到以下情态动词：,must,might,could,may,cant,couldnt.,意思,推测程度,must,一定，肯定,100%,的可能性,may,might,/could,有,可能，也许,20%-80%,的可能性,cant,不可能，不会,可能性几乎为零,一,.can,和,could,的区别和用法,1.,can,表示体力和脑力方面的能力,或根据客观条件能做某种动作的“能力”。例如：,Can,you speak English,？,Can,you make a cake,？,can,用在否定句和疑问句中时有时表示说话人的“猜测”或“不肯定”。,例如：,Can,the news be true,？,(,在日常会话中,can,可代替,may,表示“允许”,may,比较正式,),2.,could,是,can,的过去式,表示过去有过的能力和可能性,还有怀疑和不肯定的意思,(,在否定和疑问句中,),。,e.g.,She,couldnt,skate when she was five years old.,（能力）,At that time we thought the story,could,be true,（可能性）,could,用来提问,是有礼貌的请求,Could.,，,please?,语气较为婉转。,e.g.,Could,I speak to Mr.Smith,please?,二,.might,和,may,的区别和用法,:,1.,may,的用法,:,a.,表示“允许”或“请求”。,e.g.,May,I come in,？,在使用这一用法时需注意,:may,表示“允许”的否定形式是,must not,意思是“不应该”“不许可”。,e.g.,May,I take this book out of the reading-room,？,No,you,mustnt,b.,表示说话人的猜测，认为某一事情“或许”或“可能”发生。,e.g.,He,may,know the answer,c.,may,用在感叹句中可表示祝愿、愿望。,e.g.,May you succeed,(,祝你成功。,),May you have a pleasant journey,(,一路平安。,),2.,might,的用法,:,a.,might,可以代替,may,表示现在时间的动作，但语气较为婉转客气或更加不肯定。,e.g.,Might,I take a suggestion,？,b.,might,用来表示现在时间时,还可表示“规劝”。,e.g.,You,might,pay more attention to spoken English,三,.must,与,have to,的区别,have to,比较强调客观需要,must,着重说明主观看法。另外,have to,能用于更多时态,比较下面的句子：,We,had to,be there at 10:00.,有时两者都可以用,意思差别不大。,e.g.,We,must/have to,leave now.,must,在表示说话人对事物的推测时候要注意它比,may,肯定得多,相当于汉语的“一定”或“准是”。,(,只有在肯定句中能这样用。,),This,must be,your room,在回答由,must,引起的问题时,如果是否定的答复，不能用,mustnt,而需要用,neednt,或,dont have to,因为,mustnt,是“一定不要”的意思。,表示对某件事的确定程度，即表示推测,的时候，通常会用到情态动词,must,may,might,could,等。,按照推测的可能性来区别,must,的可,能性最大,may,次之。,could,和,might,不表,示过去时态,只是表示推测的可能性比,较小。,例如：,Its two oclock now.He,must be,in by,now.,现在是两点钟。他一定到了。,各种预测,He,may,go back in the fall.,他可能秋季回去。,He thinks it,could/might,be wise to try,his luck there.,他想在那儿碰碰运气可能是明智的。,2.,情态动词表示推测的几种形式：,1,）“情态动词,+,动词原形”表示对现在情况的推测。例如：,This book,must be,Toms.He is looking,for it.,这本书一定是汤姆的。他正在找这,本书。,2,）“情态动词,+be+v-,ing,形式”表示对现,在正在进行的情况进行推测。例如：,At this moment,our teacher,may be,correcting our exam papers.,此刻，我们老师可能正在批改试卷。,3,）“情态动词,+have+,动词的过去分词”表,示对过去情况的推测。例如：,The road is wet.It,must have rained,last,night.,路是湿的，昨天晚上一定下雨了。,【,特别提醒,】,must,表示推测时只用于肯定句，表示,很有把握的推测，意为“一定”。,例如：,Our teacher,must be,in the office because,the light is on.,我们的老师一定在办公室，因为灯还亮,着。,2.,表示否定推测常用,cant,，意为“不可,能”。,例如：,He cant be at home,because he has gone to Beijing.,他不可能在家，因为他去了北京。,1.Choose the best answer,()1.Susans parents have bought a large house with a swimming pool.,It _ be very expensive.,A.must B.can,C.mustntD.may not,()2.Henry _ be at home because he phoned me from the farm just now.,A.mustntB.isnt able to,C.may notD.cant,A,D,()3.Whose red backpack is th
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