英语：unit13 lesson3 guessing about people教案(北师大版必修5)

Lesson 3 Guessing about PeopleLesson 3 Guessing about People Teaching Aims:Teaching Aims: To practise using modals for speculation To distinguish between modals used for decision, advice and speculation Teaching difficulties:Teaching difficulties: To practise using modals for speculation Teaching Aids:Teaching Aids: computer, cassette Teaching procedures:Teaching procedures: ⅠⅠ. Warming up. Warming up T: First look at the title “Guessing about People” Who can tell me what’s the meaning of the title? S: T: “Guessing about people” means make a judge about people without being sure of all the facts. In daily life If we are curious or worried at somebody or something we often make various guess. Think over which words we will use when we guess what will happen? What happened? S: must, may, may not, can, can’t and so on . T: now we will listen to a dialogue in which there are a lot of words about speculation. ⅡⅡListeningListening Listen to the dialogue to do the rcise 1.The two students were missing ______. A. because they were separated from the other students. B. in a cave. C. for the reason we don’t know. 2. The dialogue tells us ______. A. The two students disappeared 3 days ago. B. My cousin know where they are C. The rescuers found them in a cottage. 3. The dialogue makes various guessed except_________. A. They must be frightened. B. They both are injured. C. They might have some food to eat. Answers:1.C2.A3.B T: Ca n you say out the main idea of the story in you own words? S: T: Now let’s look at whether your story is true or not. Do the rcise 2 Listen to the dialogue again and complete the gaps Play the cassette once for students to listen and then again for them to complete the gaps. ⅢⅢ Grammar Grammar Do the rcise 3. The two people in the dialogue make various guesses at the two missing students. They use the following sentences but you need to complete the gaps with modal verbs. Check students’ answers by having them read the sentences aloud. Draw their attention to the different infinitive s after the modals. Do the rcise 4. As a class students discuss the meaning of the sentences in the table and decide if they express decision, advice or speculation. Ask students how they would express decision (is going to; is about to;) and advice (should , had better, ) Do the rcise 5 The grammar we learn today is modal verbs. Modal verbs can express possibility, permission, intention and guess.Now do the rcise 5. Which of the modal verbs in rcise 3 express the following. Do the rcise 6 As a whole class, students discuss what the sentences 1-3 are referring to and match them with a, b and c. Guide students to analysis the modal verbs’ use in the past, in the future and now. 用在肯定句中： 对过去的推测： may /might have +PP(过去分词) must have +pp(过去分词) 对现在的推测： must be + noun / adj maybe/ must be + ving must +v(原形) 用在否定句中 对过去的推测： can’thave + PP(过去分词) 对现在的推测： can’t be + noun / adj can’t +v(原形) Do the rcise 7, 8 and 9 to practise and consol