Unit 2 Let's celebrate Period 4 Using languageppt课件--2022高中英语新外研版必修第二册.pptx

1、Unit 2 Lets celebrate!1 Look at the sentences from the reading passage and answer the questions.a That is why Letters from Father Christmas could be the perfect bookb The children must have been very excited as they opened it.c they might not receive their presents if they were not good.1)What do th

2、e words in red indicate:an order,a request,ability or possibility?The words in red indicate possibility.v.表明表明,显示显示n.请求请求,要求要求a That is why Letters from Father Christmas could be the perfect bookb The children must have been very excited as they opened it.c they might not receive their presents if t

3、hey were not good.2)Will the meaning of sentence(a)change if we replace“could”with“must”or“might”?If we replace“could”with“must”,the meaning of sentence(a)will change.It means the speaker is quite sure about the statement.If we replace“could”with“might”,the meaning of sentence(a)will remain more or

4、less the same.“Could”and“might”in affirmative sentences have a similar meaning when indicating possibility.a That is why Letters from Father Christmas could be the perfect bookb The children must have been very excited as they opened it.c they might not receive their presents if they were not good.3

5、)What happens if we change“must”and“might”in sentences(b)and(c)into“could”?If we change“must”in sentence(b)into“could”,it means the speaker is not sure about the statement,and its only a possibility.If we change“might”in sentence(c)into“could”,it means its impossible for the children to receive pres

6、ents.a That is why Letters from Father Christmas could be the perfect bookb The children must have been very excited as they opened it.c they might not receive their presents if they were not good.Look for more sentences with modals in the reading passage.1)Who could it be from?2)The letters were al

7、so beautifully illustrated-each must have taken its true author,Tolkien,a long time to complete.3)In another letter,Father Christmas complained about how he could not stop his helpers playing games with the toys instead of wrapping them up.4)we can all share the true spirit of giving at Christmas ti

8、me.情态动词情态动词must,can/could,may/might均可表示推均可表示推测测,它们可以对过去、现在或将来的情况作出语它们可以对过去、现在或将来的情况作出语气强弱不同的推测。气强弱不同的推测。把握推测语气的特点，选择恰当的情态动词。把握推测语气的特点，选择恰当的情态动词。1.表示表示肯定的推测肯定的推测时：时：各各情态动词语气从弱到强依次情态动词语气从弱到强依次为为 might may could can must；表示否定的推测表示否定的推测时：时：cant/couldnt语气较强，意为语气较强，意为“不可能不可能”；may not/might not语气较弱，意为语气较弱，

9、意为“可能可能不不”。must的否定形式的否定形式mustnt不表示否定推测，而不表示否定推测，而是表示是表示“不许可不许可”或或“不应该不应该”。2.情态动词表示推测时情态动词表示推测时,在用法上有一些限制在用法上有一些限制:must只用于肯定句中，意为只用于肯定句中，意为“一定，准一定，准 是是”。如如:This must be your room.could多用于否定句和疑问句中。多用于否定句和疑问句中。如：如：He looks young.He couldnt be over 50.Could it be true?may/might用于肯定句和否定句中。用于肯定句和否定句中。如：如：

10、They may not know his address.She told me that she might go to Hawaii this winter.确定被推测时间，正确判断动词时态。确定被推测时间，正确判断动词时态。1.对现在或将来的情况进行推测时，用对现在或将来的情况进行推测时，用“情情态动词态动词+do”。eg You must be Mr.Smith.I was told to expect you.Our team might win the race.2.对此时此刻正在进行的情况进行推测时，用对此时此刻正在进行的情况进行推测时，用“情态动词情态动词+be+动词动词-i

11、ng形式形式”。eg She may be waiting for you in the entrance hall at the moment.The police are stopping all cars.They must be looking for the escaped prisoner.3.对过去的情况进行推测时，用对过去的情况进行推测时，用“情态动词情态动词+have done”。eg I didnt see Alex.He might have gone home.I couldnt have left my bag on the bus.They must have go

12、tten lost or theyd be here by now.“情态动词情态动词+have done”是高考的热点，在是高考的热点，在做此类题时，要仔细体会题干中所提供的信做此类题时，要仔细体会题干中所提供的信息，尤其注意题干中给出的时态。息，尤其注意题干中给出的时态。must have done一定，一定，想必。表示对已经发生的事情的肯定想必。表示对已经发生的事情的肯定推推测，语气测，语气较强。较强。eg It must have rained last night.The ground is wet.may/might have done可能已经，或许已经。表示可能已经，或许已经。表

13、示对已经发生过的情况对已经发生过的情况的肯定推测，语气稍弱的肯定推测，语气稍弱。eg He may/might have given you more help,even though he was busy.could have done不可能。表示对过去发生的一不定推测。不可能。表示对过去发生的一不定推测。eg They cant have gone out,because the light is on.cant/couldnt have done表示过去本来能够做某事而实际上没有做表示过去本来能够做某事而实际上没有做eg He could have passed the exam,bu

14、t he was too careless.I.选用括号内合适的内容补全下面句子。选用括号内合适的内容补全下面句子。1.Since they arent answering their telephone,they _(can have left,must have left).2.Mr.Reed looks pale.He _(can,may)be ill.must have left may3.They _(must,might)be holding a meeting in the classroom.Im not sure.4.You _(must,may)be Mr.Smith.I

15、was told to pick you up.5.They _ live(could,must)in New York,but Im not sure.6.She was ill.She _(couldnt have attended,mustnt attend)the meeting here.mightmust couldcouldnt have attended1.Jim says we _ stay in his house as long as we leave it clean and tidy.(2020年天津卷年天津卷单项填空单项填空)A.mustB.canC.needD.s

16、houldB 2.I cant find my purse.I _ it in the supermarket yesterday,but Im not sure.(2018年天津卷单项填空年天津卷单项填空)A.should leave B.must have left C.might leave D.could have leftD 2 Rewrite the underlined sentences in the conversation using can/could,may/might and must.(At a fancy dress party)Chris:I spent age

17、s putting up all the balloons and flowers last night.Jean:I expect you are feeling tired now!Chris:Yes,I am.Look that guy is dressed as Batman.Is that Mike?Jean:Its possibly him.Check out that girl over there.Im sure thats Lucy.Chris:No,I dont think thats Lucy.Lucy isnt that tall.Jean:Look at those

18、two guys dressed as chickens!Oh,theyre waving at us!Maybe theyre from our school.Chris:Lets go and find out.You must be tired now!It may/might/could be him.That must be Lucy!that cant be Lucy!They may/might/could be from our school.Black Friday is one of the busiest shopping days of the year.Stores

19、have big sales and open their doors very early.3 Look at the picture and make as many sentences as possible using can/could,may/might and must.The woman in red must be very excited to buy so many things.The man with a wallet in his hand might be a bit reluctant to pay.The woman in glasses may be ver

20、y tired to get up so early and carry so many bags.The cashier might be feeling uncomfortable as he is sweating a lot.Do you know Singles Day?Make as many sentences as possible using can/could,may/might and must.Describe a festival celebration using the words and expressions you have learnt.To celebrate,we often drink/eat,give as gift,decorate with