1、Unit 5 It must belong to Carla,Period 1,Jim,Guessing,Who has the following things?,He cant be _. He could/might be _.,He cant be _. He could/might be _.,He cant be _. He could/might be _.,He cant be _. He could/might be _.,He must be _.,Can you guess what it is? It could be _. It also might be _.,a

2、white vase,two faces,It could be _. It also might be _.,Can you guess what it is?,a dog,two girls,Could A be bigger than B? In fact, A and B must be _ _.,Which one is bigger, A or B?,A,B,the same size,No.,表示推測的情態(tài)動詞 在英語中，表示對某件事物的確定程度，即表示推測的時候，我們通常會用到以下情態(tài)動詞：must, might, could, may, can, cant, couldnt.

3、,must,cant,could might,100% probably true,40%-80% 20%-40% possibly true,0 almost not true,Learn to make inference,情態(tài)動詞用于表示推測的用法; 情態(tài)動詞+do sth.表示對現(xiàn)在事情的推測；情態(tài)動+be doing sth.表示對正在發(fā)生事情的推測；情態(tài)動詞+have done sth.表示對過去或已完成事情的推測。 eg:1.They must be at home. 2.He might/may have lost his life in the accident. 3.The

4、 actors must be making a movie.,一.肯定推測（用在肯定句中） 1.Must 表示較有把握的推測, “一定” 2.May表示對現(xiàn)在把握不大的推測，“可能” eg. You may be right. 3.Can 表示理論上的可能性 eg. Smoking can cause cancer. 4.might/could也可以表示推測，常用在過去式中，可以代替may/can,但語氣較為婉轉客氣或更加不肯定。 e.g. He might/could go to concert.,二.否定推測 1.表示否定推測時，語氣最強，“指不可能” ，帶有驚異、懷疑的感情色彩。 Eg

5、. The actor cant be zhouxun. Because she has gone to shanghai. 語氣不很肯定時，常用May not或 might not表否定推測，意為“可能不，也許不” Eg. He may not /might not be at home. 三.疑問句中的推測 常用can 或could，意為“可能”. Eg. Who can it be? Can it be my mother?,1. 這本書一定是李雷的。他正在找這本書。 This book _be Li Leis. He is looking for it.,2. 這個發(fā)帶可能是韓梅的。她

6、喜歡戴發(fā)帶。 The hair band _be Han Meis. She likes wearing a hair band.,must,could,3. 這個玩具熊可能是約翰的妹妹的。 她還是個小姑娘。 The toy bear _belong to Johns sister. She is a little girl.,4. 這個排球不是瑪麗的。她根本不喜歡排球。 The volleyball _be Marys. She doesnt like playing volleyball at all.,might,cant,T-shirt,jacket,Toy car,magazine,

7、CD,book,cup,Listening and speaking,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

8、 conversations,Sample dialogue 1: A: Look! Whose toy car is this? B: It must be Janes little brothers/belong to(介詞) 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 f

9、avorite 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

10、few minutes ago. A. mustnt B. shouldnt C. cant D. may not,B. must have been,C. 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. must,B. may,B. might,1. 這本書一定是李雷的。他正在找這本書。 This book must be Li Leis. He is looking for it.,2.Translation,2. 這個發(fā)帶可能是韓梅的。她喜歡戴發(fā)帶。 The hair band could be Han Meis. She likes wearing a hair band.,3. 這個玩具熊可能是約翰的妹妹的。 她還是個小姑娘。 The toy bear