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1、Unit 5It must belong to Carla.Who is the man?He cant be Bill Gate.?他他不可能不可能是比尔是比尔盖茨。盖茨。He may be Liu Xiang.他他也许也许是刘翔。是刘翔。He must be Liu Dehua.他他一定一定是刘德华。是刘德华。Oh, yes. He is Liu Dehua.cant在此表示猜测，译为在此表示猜测，译为“ “不可能不可能” ”，后接动词原形。，后接动词原形。Leading inLook and guessmay在此表示猜测，译为在此表示猜测，译为“ “也许，也许，可能可能” ”，后接动词原
2、形。，后接动词原形。must在此表示猜测，译为在此表示猜测，译为“ “肯定，肯定，极可能极可能” ”，后接动词原形。，后接动词原形。Who is he?He cant be may (could) be must be ?Look and guess. Using “cant, may, must”Look at the picture. Write the things you see in the correct columns in the chart.ClothingFun thingsKitchen thingshatvolleyballplateT-shirtCDscupnoteb
3、ooktoy carbook1aListen and match each person with a thing and a reason.1bPersonThingReasonJanes 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 l
4、oves cats.Listen and match each person with a thing and a reason.1bModel: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.Sample dialogue 1:A: Look! Whose toy car is this?B: It must be Janes little brothers. Because he was the on
5、ly 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.1. The homework cant be Carols. She wasnt at school today.
6、考例考例Look at the boy running on the ground. Is it Davis?It _ be him. I saw him go to the teachers office just now.A. mustB. cantC. couldD. might (2007湖北黄冈湖北黄冈)B答案和解析答案和解析 B。cant表示否定的推表示否定的推测；测；must表示肯定的推测；表示肯定的推测；could ,might表示可能的推测。表示可能的推测。2. The French book must be Li Yings. Shes the only one whos
7、studying French.考例考例 Even the top students in our class didnt work out the problem. So it _ be very difficult.A. needB. mustC. cantD. shouldnt (07山东滨州山东滨州)解析解析 此处此处must表示肯定的推测。表示肯定的推测。B1. 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.I. 用must, may, might或cant 填空。mustcantmightmaymustThank you for listening!