九年级英语Unit5Period1.ppt
Unit 5 It must belong to CarlaPeriod 1JimGuessing Who has the following things?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 girls Could A be bigger than B? In fact, A and B must be _ _.Which one is bigger, A or B?ABthe same sizeNo. 表示推测的情态动词表示推测的情态动词 在英语中，表示对某件事物的确在英语中，表示对某件事物的确定程度，即表示推测的时候，我们定程度，即表示推测的时候，我们通常会用到以下情态动词：通常会用到以下情态动词：must, might, could, may, can, cant, couldnt. cantcouldmightLearn to make inference程度程度肯定句肯定句否定句否定句疑问句疑问句must may might/could cantcan 情态动词用于表示推测的用法; 情态动词+do sth.表示对现在事情的推测；情态动+be doing sth.表示对正在发生事情的推测；情态动词+have done sth.表示对过去或已完成事情的推测。 eg:1.They must be at home. 2.He might/may have lost his life in the accident. 3.The actors must be making a movie.一一.肯定推测（用在肯定句中）肯定推测（用在肯定句中）1.Must 表示较有把握的推测表示较有把握的推测, “一定一定”2.May表示对现在把握不大的推测表示对现在把握不大的推测，“可能可能”eg. You may be right. 3.Can 表示理论上的可能性表示理论上的可能性 eg. Smoking can cause cancer.4.might/could也可以表示推测，常用在也可以表示推测，常用在过去式中，可以代替过去式中，可以代替may/can,但语气较但语气较为婉转客气或更加不肯定。为婉转客气或更加不肯定。 e.g. He might/could go to concert. 二二.否定推测否定推测 1.表示否定推测时，语气最强，表示否定推测时，语气最强，“指不可能指不可能” ，带有惊异、怀疑的感情色彩。带有惊异、怀疑的感情色彩。 Eg. The actor cant be zhouxun. Because she has gone to shanghai. 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” Eg. He may not /might not be at home. 三三.疑问句中的推测疑问句中的推测 常用常用can 或或could，意为，意为“可能可能”. Eg. Who can it be? Can it be my mother? 1. 这本书一定是李雷的。他正在找这本书一定是李雷的。他正在找这本书。这本书。 This book _be Li Leis. He is looking for it. 2. 这个发带可能是韩梅的。她喜欢这个发带可能是韩梅的。她喜欢戴发带。戴发带。 The hair band _be Han Meis. She likes wearing a hair band.mustcould 3. 这个玩具熊可能是约翰的妹妹的。这个玩具熊可能是约翰的妹妹的。 她还是个小姑娘。她还是个小姑娘。 The toy bear _belong to Johns sister. She is a little girl. 4. 这个排球不是玛丽的。她根本不喜这个排球不是玛丽的。她根本不喜欢排球。欢排球。 The volleyball _be Marys. She doesnt like playing volleyball at all.mightcantClothingClothingFun thingsFun thingsKitchen thingsKitchen things hat volleyball plateT-shirtjacketToy carmagazineCDbookcup Listening and speaking is her favorite author.1. Janes little brothertoy carHe was the only little kid at the picnic.2. MarybookHemingwaylistens to classical music. 3. Carla volleyballShe loves volleyball.4. Deng WenmagazineHe loves cats.5. GraceCDShe alwaysPractise making conversationsSample dialogue 1:A: Look! Whose toy car is this?B: It must be Janes little brothers/belong to(介词介词) Janes little brother. Because he was the only little kid in the picnic.Sample dialogue 2:A: Look! Whose book is this?B: It must be Marys /belong to Mary . 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.1. Choose the best answer 1. I didnt hear the phone. I _ asleep. A. must be B. must have been C. should be D. should have been 2. Mary _ be in Paris. I saw her in town only a few minutes ago. A. mustnt B. shouldnt C. cant D. may notB. must have beenC. cant 3. Peter _ come with us tonight, but he isnt very sure yet. A. must B. may C. can D. will 4. I thought you _ like something to read, so I have brought you some books. A. may B. might C. could D. mustB. mayB. might 1. 这本书一定是李雷的。他正在找这本书一定是李雷的。他正在找这本书。这本书。 This book must be Li Leis. He is looking for it.2.Translation 2. 这个发带可能是韩梅的。她喜欢这个发带可能是韩梅的。她喜欢戴发带。戴发带。 The hair band could be Han Meis. She likes wearing a hair band. 3. 这个玩具熊可能是约翰的妹妹的。这个玩具熊可能是约翰的妹妹的。 她还是个小姑娘。她还是个小姑娘。 The toy bear might belong to Johns sister. She is a little girl. 4. 这个排球不是玛丽的。她根本不喜这个排球不是玛丽的。她根本不喜欢排球。欢排球。 The volleyball cant be Marys. She doesnt like playing volleyball at all.
