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Unit 5It must belong to Carla.Section ALanguage Goal:Grammar:make inferences by using must,may,could,might and cant.Words and phases:learn the differences between too much and much too;because and because of 表示推测的情态动词表示推测的情态动词 在英语中，表示对某事物的确定程度，在英语中，表示对某事物的确定程度，即表示推测的时候，我们通常会用到以下情态动词：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,can,cant,couldnt 等。等。PresentationWho is the man?He cant be Bill Gates.?他他不可能不可能是比尔是比尔.盖茨。盖茨。cant在此表示猜测，在此表示猜测，译为译为“不可能不可能”，后接动，后接动词原形。词原形。He may be Liu Xiang.他他也许也许是刘翔。是刘翔。may在此表示猜测，译在此表示猜测，译为为“也许，可能也许，可能”，后接，后接动词原形。动词原形。He must be Liu Dehua.他他极有可能极有可能是刘德华。是刘德华。must在此表示猜测，在此表示猜测，译为译为“肯定，极可能肯定，极可能”，后接动词原形。后接动词原形。Oh,yes.He is Liu Dehua.Leading inLook and guessWho is he?He cant be may be must be?Look and guess.Using“cant,may,must”.Practice He cant be _.He may be _.Look and guess.Using“cant,may,must”?He must be _.Where is he?He cant be in/at may must?Look and guess.Using“cant,may,must”Whose notebook is this?It may belong to must belong to cant belong to Mr Green?Zhang QiangLi BoMr Greenbelong to“属于属于”.Can you guess what it is?It could be_.It also might be_.a white vasetwo faces It could be _.It also might be _.Can you guess what it is?a dogtwo girlsLook at the picture.Write the things you see in the correct columns in the chart.ClothingFun thingsKitchen thingshatvolleyballplateT-shirtCDscupnotebooktoy carbook1aPersonThingReasonJanes little brothervolleyballHemingway is her favorite author.Marytoy carShe loves volleyball.CarlamagazineHe was the only little kid at the picnic.Deng WenbookShe always listens to classical music.GraceCDHe loves cats.Listen and match each person with a thing and a reason.1bTapescriptsGirl 1:Whose volleyball is this?Boy 1:It must be Carlas.She loves volleyball.Girl 1:How about this toy car?Girl 2:Oh,that toy car must belong to Janes little brother.He was the only little kid at the picnic.And the magazine must belong to Deng Wen.He loves cats.Boy 1:Oh,and look,someone left a book.Girl 2:Oh,yeah This book must be Marys.Hemingway is her favorite author.Girl 1:OK and how about this CD?Girl 2:Hm The CD must belong to Grace.She always listens to classical music.Model:A:Whose book is this?B:It must be Marys.Hemingway is her favorite author.作家作家PAIRWORK1cAsk and answer like the model.Things in the backpack1.2.3.T-shirthair bandtennis ballsBob and Anna found a backpack in front of their school.Listen and write down the things in the backpack.2aListening practice1.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.mustmustcantcantcouldcouldmightmightmustmustListen again.Fill in the blanks.2bListening practiceTapescriptsBob:Oh,look!Whose backpack do you think this is?Anna:I dont know.Look,heres a school T-shirt.Bob:Well then,the person must go to our school.Oh!Here is a hair band,so the person cant be a boy.Anna:It could be Meis hair band.She has long hair.Bob:Or the hair band might belong to Linda.She was at the picnic,wasnt she?Anna:Yes,she was.But then the backpack could belong to Rita.Shes always forgetting things.Bob:Oh,look!Tennis balls.Anna:Then it must be Lindas backpack.She has long hair and shes on the tennis team.Bob:Youre right!1.must用于肯定句，表示很有把握的推测，意用于肯定句，表示很有把握的推测，意为为“准是；一定准是；一定”。后接动词原形，表示对现。后接动词原形，表示对现在情况的推测。例如：在情况的推测。例如：He didnt hear the phone.He must have been asleep.他没有听到电话响，他肯定是已经睡着了。情态动词表推测用法小结情态动词表推测用法小结情态动词情态动词 must,should,can,may,could,might 都可表示推测都可表示推测。一、肯定推测一、肯定推测2.should用于肯定句中，语气较用于肯定句中，语气较must弱，意为弱，意为“很可能；应该很可能；应该”,指按常理推测。例如：指按常理推测。例如：Mr Wang left yesterday.He should be home by now.王先生昨天就离开了王先生昨天就离开了,现在该到家了。现在该到家了。3.can用在肯定句中，表示理论上的可能性。用在肯定句中，表示理论上的可能性。例如：例如：Smoking can cause cancer.吸烟有可能导致癌症。吸烟有可能导致癌症。5.could,might 表示推测，常用在过去时态中；表示推测，常用在过去时态中；但在某些场合，为了使语气更委婉，常用但在某些场合，为了使语气更委婉，常用could和和might代替代替can和和may。例如：例如：4.may用在肯定句中，表示对现在把握不大的推用在肯定句中，表示对现在把握不大的推测，意为测，意为“也许；可能也许；可能”。例如：。例如：This story may be true.这个故事也许是真的。这个故事也许是真的。We saw something in the sky last night.It could/might be a UFO.昨天晚上我们看见天空中有个东西。它有可能不昨天晚上我们看见天空中有个东西。它有可能不明飞行物。明飞行物。二、否定推测二、否定推测1.表示否定的推测时，表示否定的推测时，cant/couldnt语气最强，指语气最强，指“不可能不可能”，带有惊讶、怀疑的感情色彩。例如：，带有惊讶、怀疑的感情色彩。例如：The story sounds reasonable,but it cant be true.这个故事听起来合情合理，但不可能是真的。这个故事听起来合情合理，但不可能是真的。2.语气不很肯定时，常用语气不很肯定时，常用may not或或might not表否定推测，意为表否定推测，意为“可能不；也许不可能不；也许不”。例如：。例如：Simon may not/might not be in the classroom.西蒙可能不在教室里。西蒙可能不在教室里。Whose can it be?Can it be Toms?那能是谁的呢那能是谁的呢?是汤姆的吗是汤姆的吗?三、疑问句中的推测三、疑问句中的推测疑问句中的推测，常用疑问句中的推测，常用can或或could,意为意为“可能可能”。例如：。例如：1.The notebook be Mings.It was on her desk.2.The homework be Carols.She wasnt at school today.3.The soccer ball be Johns or Tonys.They both play soccer,dont they?must/mightcant might Fill in the blanks with“must”,“might”,“could”or“cant”.Then tell your partner why.2c4.The French book be Li Yings.Shes the only one whos studying French.5.I cant find my backpack.It be still at school.6.The photo be Lus.Those are his parents.7.The red bicycle be Hus.She has a blue bicycle.8.This ticket be my aunts or uncles.Theyre both going to the concert.must/mightcant mightmust must 1.The textbook _ be his.It has his name on it.2.The beautiful trousers _ be Jims.They are too long.3.The football _ be Wei Huas or Tian Huis.They both play football.4.Where is Xiao Ling?She _ be in her bedroom,but I am not sure.5.After a long walk,the old man _be tired now.用用must,may,might或或cant 填空。填空。mustcantmightmaymustWhose notebook is this?It must be Mings.It has her name on it.Whose French book is this?It could be Carols.She studies French.Whose guitar is this?It might belong to Alice.She plays the guitar.Whose T-shirt is this?It cant be Johns.Its much too small for him.Dear Anna,_If you have any idea where it might be,please call me._ I think I dropped it during the concert so it might still be in the symphony hall._ I tried to call you but your mom said you were still at your optometrist appointment(I hope your new glasses look nice!)落下落下;掉下掉下交响乐交响乐;交响曲交响曲验光师约会验光师约会.2453aRead and number the parts in order and circle the new words._I really need it because I have a math test tomorrow.Its crucial that I study for it because it makes up 30%to the final exam._ Im really anxious,because I cant find my backpack.Thanks,Linda13关键的关键的;至关重要的至关重要的最后的最后的;最终的最终的忧虑的忧虑的;焦虑的焦虑的;不安的不安的组成组成A:What do you think“anxious”means?B:Well,it cant mean“happy”.A:It might mean“worried”.B:Oh,yes.Shes worried because of her test.PAIRWORK3bTalk about the words you dont understand.Using“cant”,“must”,“might”.PAIRWORK4Guess the owner of the backpack.Model A:Here are some earrings.The owner cant be a boy.B:Well,it could be a boy.The earrings might be a present for his mother.1.The old house over there _ my grandfather.A.belong B.belongs toC.is belonged to D.belong to2.It must be _ building in the small town.A.the only modern B.modern onlyC.only the modern D.only modern3.The boy hardly did sports,so his mother felt very _ about his health.A.nervous B.stressedC.hard D.anxious单项选择。单项选择。BDA4.There is _ snow.Put on your coat.Its _ cold today.A.too much;much too B.too much;too many C.much too;much too D.too much;too much5._ your health.A.Be careful for B.Be careful to C.Be careful of D.Be careful about6.We were late for school last Wednesday _the heavy rain.A.as B.because of C.because D.sinceABC
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