情态动词表示推测

1、学习目标学习目标 掌握情态动词掌握情态动词must, may, might, can, could 来表示推测来表示推测意思意思推测程度推测程度must一定，肯一定，肯定定100%的可能性的可能性maymight/could有可能，有可能，也许也许20%-80%的可能的可能性性cant不可能，不可能，不会不会可能性几乎为零可能性几乎为零表示推测的情态动词有表示推测的情态动词有must, may, could, might, can。 must表示说话人对事物的推测可能性表示说话人对事物的推测可能性的程度非常大，意为的程度非常大，意为“一定；准是一定；准是”；表示有把握的否定推测时用表示有把握的

2、否定推测时用cant，意为，意为“不可能不可能”。如：。如：1. I cant find my keys. I must have left them at home.2. - Is she Mary? - That cant be her. Shes in hospital. can表示表示“可能可能”，常用于否定句、疑，常用于否定句、疑问句中问句中。could为为can的过去式，表示推测的过去式，表示推测的语气较的语气较can弱。如：弱。如：- Can the man there be our math teacher?- He may be, but I am not sure. may

3、意为意为“也许也许”。might为为may的过的过去式，表示说话人对现在或将来不太确定去式，表示说话人对现在或将来不太确定的可能性的推测。的可能性的推测。如：如：Li Ming might get here in time, but I am not sure.He must/ might/could be _. Can you guess what it is? It could be _. It also might be _.a white vasetwo facesIt could be _.It also might be _.Can you guess what it is?a d

4、ogtwo girls Could A be bigger than B? In fact, A and B must be _ _.Which one is bigger, A or B?ABthe same sizeNo.How many people are there?1. This hook _ be Carlas. Her name is on the book. A. might B. could C. must D. cant2. Jacks bike is blue, so this yellow one _ be his. A. mustnt B. cant C. coul

5、dnt D. mightntChoose the best answer.3. The guitar _ belong to Alice. Only she plays the guitar here. A. could B. must C. cant D. can4. - What do you think “upset” mean? - Im not sure. It _ mean sad, Amust Bcan Cmight Dcant5. Ill have a test _ writing next week. Aat Bof Con Din 6. This backpack must

6、 be _. I saw her carry it yesterday. ALucys BLucy CLucys DLucys 1. I didnt hear the phone. I _ a sleep. A. must be B. must have been C. should be D. should have been2. Mary _ be in Paris. I saw her in town only a few minutes ago. A. mustnt B. shouldnt C. cant D. may notChoose the best answer.3. Pete

7、r _ come with us tonight, but he isnt very sure yet. A. must B. may C. can D. will4. I thought you _ like something to read, so I have brought you some books. A. may B. might C. could D. must1. - Are you going to Beijing by plane? - Its fast, but expensive. So I am not sure. I _ take a train. (07江西江

8、西) A. should B. may C. must D. will 2. - Is John coming by train? (07苏州苏州) - He should, but he _ not. He likes driving his car A. must B. can C. may D. need3. - _ I swim in that river? (07内江市内江市) - No, you _. Its dangerous to swim in it. A. Must, cant B. Can, may not C. May, mustnt4. The students _

9、play basketball after school every day. (07内江市内江市) A. allow to B. are allowed to C. were allowed to1. 这本书一定是李雷的。他正在找这这本书一定是李雷的。他正在找这本书。本书。 This book must be Li Leis. He is looking for the book. 2. 这个盒子可能是韩梅的。这个盒子可能是韩梅的。 The box could be Han Meis. Translate and write down.3. 这个玩具熊这个玩具熊(toy bear )可能是约翰妹妹可能是约翰妹妹的。的。 The toy bear