约870字。

　　高二英语Unit 13 People Lesson 3 Guessing about People教案(北师大必修5)
　　Teaching Aims:
　　To practise using modals for speculation
　　To distinguish between modals used for decision, advice and speculation
　　Teaching difficulties:
　　To practise using modals for speculation
　　Teaching Aids: computer, cassette
　　Teaching procedures:
　　Ⅰ. 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 madge 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.
　　ⅡListening
　　Listen to the dialogue to do the exercise
　　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.C   2.A    3.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 exercise 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.
　　Ⅲ Grammar
　　Do the exercise 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.
　　Checdents’ answers by having them read the sentences aloud. Draw their attention to the different infinitive forms after the modals.
　　Do the exercise 4.
　　As a class students discuss the meaning of the sentences in the table and decide if they express decision, advice or speculation.
　　Asdents how they would express decision (is going to; is abo