Unit8ItmustbelongtoCarlaSectionA3

1、section aperiod threelaboratoryoutdoorscoatsleepyn. 实验室实验室adv. 在户外；在野外在户外；在野外n. 外套；上衣外套；上衣adj. 困倦的；瞌睡的困倦的；瞌睡的words reviewto learn to use must, might, could and cant for making inferences it must be carlas.it could be meis hair band.im not sure, but it cant be a dog.a: whose volleyball is this?b: it

2、must be carlas. she loves volleyball.a: whose hair band is this?b: it could be meis hair band.a: what did you see that night?b: im not sure. but it cant be a dog. it was bigger. i think it might be a bear or a wolf.read the sentences below and pay attention to the red words.1. a: whose volleyball is

3、 this? b: it _ be carlas. she loves volleyball.2. a: whose hair band is this? b: it _ be meis hair band.3. a: what did you see that night? b: im not sure. but it _ be a dog. it was bigger. i think it _ be a bear or a wolf.mustcouldcantmight ready?表推测的情态动词表推测的情态动词情态动词情态动词must, can, may, could, might都

4、都可以表示推测。可以表示推测。must表示对现在的状态或现在发生的事表示对现在的状态或现在发生的事情很有把握的推测，情很有把握的推测， 意为意为“一定；一定； 准是准是”，可能性为可能性为100%。 如：如：you have studied for a long time. youmust be tired.may, could, might这三个词表示的可这三个词表示的可能性较小，能性较小， 意为意为“有可能；有可能； 也许也许”， 可能性占可能性占20%至至80%。 如：如：my friend has lost his watch. this may /might / could be h

5、is, but im not sure.cant 表示很有把握的否定推测，表示很有把握的否定推测， 意意为为“不可能不可能”， 可能性为可能性为0%。 如：如：the blue motorbike cant be yourmothers. hers is yellow.表推测情态动词的用法表推测情态动词的用法一、根据被推测的时间，确定动词的形式。一、根据被推测的时间，确定动词的形式。 good morning. ive got an appointment with miss smith in the personnel department. ah, good morning. you mu

6、st be mrs. brown.1. “情态动词情态动词+do”形式：表示对形式：表示对现在现在或将来或将来情况的推测。情况的推测。 tom is never late for work. why is he absent today? something must have happened to him.2. “情态动词情态动词 + be + doing”形式：表示形式：表示对对此时此刻正在发生此时此刻正在发生的事情的推测。的事情的推测。he may/might be waiting for us at home.3. “情态动词情态动词+have done”形式：表示对形式：表示对过去

7、过去情况的推测。情况的推测。二、根据猜测语气的强弱，选择情态动词。二、根据猜测语气的强弱，选择情态动词。1. 在肯定句中表推测，在肯定句中表推测，must语气语气最强最强， 表示表示“肯定，一定肯定，一定”；could, may, might语气语气依次减弱依次减弱，表示，表示“可能，可能， 也许也许”。 some people who dont like to talk much are not necessarily shy; they may just be quiet people.2. 在在否定句中表推测否定句中表推测，cant, couldnt语气语气最强最强，表示，表示“不可能不

8、可能”；may/might not语气语气较弱较弱，表示，表示“可能不可能不”；mustnt 表示表示“禁止禁止”，不用于否定推测。，不用于否定推测。you cant be hungry already you had lunch only two hours ago!must表推测表推测只用于肯定句只用于肯定句，如果要表，如果要表示示否定意义否定意义，则要用，则要用cant；can表推测多用于表推测多用于否定句和疑问句否定句和疑问句，而，而用于肯定句一般指用于肯定句一般指“客观可能性客观可能性”，说，说明人或事物一时的特点。明人或事物一时的特点。三、某些情态动词表推测时的用法限制。三、某些情

9、态动词表推测时的用法限制。e.g. tigers sometimes can be very kind.1. i saw lily in the supermarket this morning. oh, it _ be her. she moved to australia the day before yesterday.2. after a long walk, the children _ be very tired now.3. john _ go with us tomorrow, but he isnt sure.cantmustmay/mightuse proper modal

10、 verbs to fill in the blanks.以下部分为课本练习，供老师在对以下部分为课本练习，供老师在对答案时选择使用。答案时选择使用。4a4achoose the best way to complete each sentence using the words in brackets.1. a: wheres jean? b: im not sure. she _ (is/ might be/ must be) in the laboratory.2. a: everyone is going to the pool after school. b: really? it

11、_ (must be/ cant be/ could be) hot outdoors.might bemust be3. a: thats the phone. b: hmm. i wonder who it _ (must be/ could be/ should be).4. a: i wonder if these are jims glasses. b: they _ (cant be/ might be/ could be) his. he doesnt wear glasses.5. a: i hear water running in the bathroom. b: it _

12、 (could be/ must be/ cant be) carla. she was thinking of taking a shower.cant becould be/must becould be4b4b complete these responses.1. a: many people are wearing coats. b: the weather must be _ _.2. a: sally has been coughing a lot. b: she might be _.3. a: this restaurant is always very crowed. b:

13、 the food _.4. a: whenever i try to read this book, i feel sleepy. b: it cant _.getting colderhaving a sore throat/illmust be deliciousbe that boring/cold outside4c4clook at this picture of a room. how much can you tell about the person who lives here? is it a boy or a girl? what are his/ her hobbie

14、s? discuss your ideas with a partner.individual activity注注: : 另附另附 word word 文档。文档。点击此处链接点击此处链接1. whose t-shirt is this? it _ be johns. its much too small for him. 2. the magazine _ be lilys, for we can find her name on the cover.3. the man _be my english teacher. he has gone to canada. 4. difficult

15、ies always go with me! cheer up! if god closes a door in front of you, there _ be a window opened for you.cantmustcantmustuse proper modal verbs to fill in the blanks.5. whos singing in the garden? it _ be mr. brown. he always practices singing at this time. 6. is the man over there mr. brown? it _ be him. he has gone to brazil to participate in a conference. 7.the woman _ be our english teacher. she has gone to canada. 8.he _ be in the classroom, i think.