Unit 2 Using language（1）Modalsppt课件--2022高中英语新外研版必修第二册.pptx

1、B2U2Using languageModals(2)Lead-inWhere is Bob?What was the matter with the lady yesterday?Read the photos and sentenses below and make inferences.He may be in his office.She might be ill yesterday.Lead-inThis restaurant must be very good.Its always full of people.That restaurant cant be very good.I

2、ts always empty.Which restaurant is better?Lead-inHe called me yesterday evening,but I didnt hear it.I must have been asleep.Activity 11.What do the words in bold indicate:an order,a request,ability or possibility?The words in bold indicate possibility.2.Whats difference between“must have been”and“m

3、ust be”?Possibility:must could/mightMust)must+v.)must+be doing)must+have done对现在情况的肯定推测对现在情况的肯定推测The light is on,and they must be at home.对正在发生的情况的肯定推测对正在发生的情况的肯定推测Listen!They must be reading in the room.对已经发生的情况的肯定推测对已经发生的情况的肯定推测The road is wet.It must have rained last night.1.Must 表表“推测推测”：1)You m

4、ust be very tired,_ you?2)You must have finished your work,_ you?haventarent-I rang your home yesterday.A man answered but I didnt recognize the voice.-Oh,it _ my brother,Peter.A.must be B.must have been C.can have been D.might be B -I didnt see marry at the meeting.-She _ ill.I guess.(可能生病了)might h

5、ave been 2.Must 表表“必须必须”：Must you go there right now?Yes,I_.No,I neednt.(=No,I dont have to.)mustnt 表表“不许可、禁止不许可、禁止”Tom,you _ leave all your clothes on the floor like this!-Must he come to sign this paper himself?-Yes,he _.(06高考高考)A.need B.must C.may D.willmustmustntmust3.Must 表表“坚持要坚持要”,“偏要偏要”：Must

6、 you play the piano at such a late hour?-Can I take off my coat?-If you must,you can.can/couldNecklace Apr,052.can/could 的用法的用法1）can,could用于疑问句和否定句中用于疑问句和否定句中,表表推测推测；It cant be true,because I was on the scene that time.-Who can that boy be?-It cant be Obamas son.What could they be doing at this time

7、 of the day?2）对过去行为的推测用）对过去行为的推测用could/can not have done The door was locked.She couldnt have been at home.My sister met him at the Grand Theater yesterday afternoon,so he couldnt have attended your lecture(上海上海 2000)3)could have done 用于肯定句，译作：“本可以”。Linda didnt catch the train.She could have caught

8、it.You could have been more careful.He paid for a seat,when he _ have entered free.A.could B.would C.must D.need4)can用于肯定句中：用于肯定句中：can表示一种客观上，理论上的可能性，并不牵涉是表示一种客观上，理论上的可能性，并不牵涉是否真的会发生否真的会发生,往往译作往往译作“有时候会有时候会”Accidents can happen in such rainy days.The weather of Chengdu in April can be very hot.Amay/

9、might3.could may(not)might(not)1)表达不太把握的推测，意为“或许，可能或许，可能”；A:Who are the two persons over there?B:They might be tourists A:Tourists?They cant be,Im afraid.Tourists usually take cameras with them.Necklace Apr,052)may/might have done 对过去不太肯定的推测1)Sorry Im late.I might have turned off the alarm clock and

10、 gone back to sleep again(北京 2000)2)It was really very dangerous.I might have killed myself.那真的是太危险了，我差点没命了。3)Where is my dictionary?I remember I put it here yesterday.You _ it in the wrong place.（2007江西卷）A.must put B.should have put C.might put D.might have putD should1-应该做某事 (09/3)-“Should we invi

11、te Sue to the party?”-“Yes,I think we should.”2 表示推测,可译“按理说”(09/2)She is studying very hard,so she should pass her examination.3 should（not）have done (08/2)Im feeling sick.I shouldnt have eaten so much chocolate.4.用于suggest/advise/order/desire/demand 等动词后的从句中 She demanded that I should apologize to

12、her.His suggestion is that we should go out.5 表示惊讶表示惊讶,翻译为竟然翻译为竟然You cant imagine that a well-behaved man should be so rude to a woman.09/86.If should 如果，万一如果，万一 If you should see Tom this evening,can you tell him to phone me?=(If you see Tom this evening,can you tell him to phone me?)=Should you se

13、e Tom this evening,can you tell him to phone me?09/3Modal verb 意义、形式和限用句型意义、形式和限用句型Must肯定句肯定句：一定，肯定：一定，肯定may/might肯定句肯定句：可能：可能,也许也许否定句否定句(may/might not)：可能不：可能不can/could否定句否定句(cant/couldnt):不可能不可能疑问句疑问句(can sth/sb-?):可能可能/会会-？肯定句肯定句(少用少用):有时会（少见的情况）有时会（少见的情况）mustnt 表示表示“不准不准”。表示推测表示推测 ORDER:Could Mi

14、ght May Can MustA:Look,someone is coming.Who _ it be?可能B:It _ be the headmaster.可能A:It _ be him.He has gone to Shanghai.不可能B:It _ be Mr Zhang.He looks like the headmaster.一定canmaycantmust1)The report is written after careful reading,so it _ be reliable(可靠的).2)It is 8 oclock.She _ be here at any mome

15、nt.3)-I didnt see marry at the meeting.-She _ ill.I guess.4)-Did you listen to the speech?-No.we _ it.But we had a lot of traffic on our way.(attend)shouldshouldmight have beencould have attended 1)The door was locked.She_ at home.2)She _ have left school,for her bike is still here.(08湖南湖南)3)My sist

16、er met him at the Grand Theater yesterday afternoon,so he _(attend)your lecture(上海上海 2000)4)Jack _(arrive)yet,otherwise he would have telephoned me(上海上海97)couldnt have attendedcantcouldnt have beencant have arrived What should have caused the water crisis?Theremustnt be one absolute answer.Some say

17、the rapideconomic growth and rising demand for water resourcesmay create a water shortage in the past 5-10 years.Some strongly believe that industrial and agricultural waterpollution could be the most dangerous as it poses a seriousthreat to water quality.Water Day is a good time to raise the awareness of water protection.Causes of Water CrisisProof Readingcan/couldcant/couldntmay have createdshould/must