职高英语Unit7HealthGrammar情态动词解析课件.ppt

1、WINTERTemplate情态动词表达情态动词表达允许允许请求请求命令命令猜测猜测意愿意愿拒绝拒绝第1页，共55页。WINTERTemplate常用情常用情态动词态动词can/couldbe able tomay/mightneeddaremust/have toshould ought tohad betterwill/wouldshall/should第2页，共55页。情态动词特征：情态动词特征：1.1.后接动词原形后接动词原形(除除oughtought外）外）2.2.不能单独做谓语不能单独做谓语,要和动词原形一起构成要和动词原形一起构成谓语动词。谓语动词。3.3.无人称和数的变化无人称

2、和数的变化:I:I youyou hehe she she it it wewe they can they can01第3页，共55页。02情态动词的否定式情态动词的否定式shall not-shant will not-wontcan not-cant must not-mustntshould not-shouldnt would not-wouldntcould not-couldnt dare not-darentneed not-neednt may not-mayntmight not-mightnt ought not-oughtnt第4页，共55页。03一一.can/coul

3、d/be able to+.can/could/be able to+动词原形动词原形1.Can you play the piano?2.Lang lang could play the piano well when he was only three years old.3.Most women here can read and write now.1 1.表能力、能够表能力、能够(could(could是过去式是过去式）第5页，共55页。4.He can speak English.5.Can you ride a bike?6.He could speak a little Rus

4、sian when he was living in Russia.7.His brother was able to take care of himself when he was ten.04第6页，共55页。A computer _ think for itself,it must be told what to do.A.cant B.couldnt C.may not D.might not第7页，共55页。05Can you teach me to play volleyball?Could you teach me to play volleyball?2.2.can can

5、表请求表请求.此时此时cancan和和couldcould没有时间没有时间上的差别，上的差别，couldcould更委婉。更委婉。语气更委婉语气更委婉第8页，共55页。-Could you come here again tomorrow?-Yes,you can.(No,Im afraid not.)3.Can(could)表表“允许允许”Can Could I go now?You can use my computer.06第9页，共55页。07Can I borrow your pen?I am sure you cant play it well.It cant be him.You

6、 cant be hungry so soon,Tom.Youve just had lunch.Anybody can make mistakes.谁都有可能犯错。4.4.表客观可能性或推测。用于否定或疑问句。表客观可能性或推测。用于否定或疑问句。Cant:肯定不。用于否定句中，语气非常强烈。第10页，共55页。WINTERTemplate8-Is Mr.Smith in his office now?-No,he _ there.I saw him in the library a minute ago.A.may beB.can be C.mustnt beD.cant be第11页，共

7、55页。09Are you able to swim?He is able to afford his family.I was not able to but I am able to now.If he works harder,hell be able to pass the next exam.He has not been able to get there before dark.be able tobe able to（能）（能）+动词原形。动词原形。有人称有人称,数和时态数和时态的变化的变化,can,can只有现在时和过去时，因此在只有现在时和过去时，因此在will,will,

8、havehave等后要用等后要用be able tobe able to第12页，共55页。10二二.may/might-May I have a dance with you?-Yes，you may.(Yes,please.)-No,you mustnt.-No,youd better not.第13页，共55页。111.表可能性表可能性He may be very busy these days.The story may not be true.We may call on you this evening.我们也许今天晚上来看你。The news may or may not be

9、true.消息也许是真的，也许是假的。第14页，共55页。10-Excuse me,where are we going to have our class meeting?-I am not sure.Ask our monitor,please.He _ know.A.canB.mayC.needD.would may表示推测时语气不十分肯定；might口气委婉。把握更小。第15页，共55页。2.表表“可以可以”，“允许允许”You may go now.May I borrow your raincoat?-May I take this book out of the reading

10、room?-Yes,you may.-No,you mustnt.might 是是may的过去式的过去式He said that I might use the computer.第16页，共55页。You _ borrow my car if you drive carefully.Will be able to B.mayA.C.Have got to D.can not第17页，共55页。113.may3.may表祝愿表祝愿 May you succeed.May you have a pleasant journey!一路平安一路平安May you enjoy yourself!祝你们

11、玩的高兴祝你们玩的高兴May you live long!祝你长寿祝你长寿第18页，共55页。12肯定式：肯定式：I/we/you/they/the students/have to do She/he/it/Tom/has to doThey/she/it had to do否定式：否定式：dont have to/doesnt have to/didnt have to疑问式：疑问式：Do/does/did+主语主语+动词原形动词原形-Do I have to go with him?-No,you dont have to/you neednt.三、三、have to must第19页，

12、共55页。13have tohave to ：“必须必须”“”“不得不不得不”，强调，强调客观需要，客观需要，有人有人 称，数和时态的变化。称，数和时态的变化。must must：只有现在时形式，强调主观看法。：只有现在时形式，强调主观看法。说话人主观上必须说话人主观上必须.I must go now.客观（外界原因）造成的，客观（外界原因）造成的，必须必须.有人称和时态变化。有人称和时态变化。I have to go now.Someone is waiting for me.1.Have to 与与must 的区别的区别第20页，共55页。WINTERTemplate14I must le

13、arn English language well.（表示主观上想把英语学好的意志。）I have to learn English language well.（客观需要，可能由于工作需要或要去欧美国家深造一段时期等客观原因。）第21页，共55页。2.Must“必须必须”否定式：否定式：mustnt “不许，一定不要不许，一定不要”The work must be finished as soon as possible.I must leave at 9:00.You must get to station before three oclock.You must come earlier

14、 tomorrow.You mustnt park your car here.第22页，共55页。13You must not(mustnt)smoke here.You mustnt take photos here.You mustnt take pets in.Mustnt “禁止禁止”第23页，共55页。3.Have to“必须，不得不必须，不得不”有更多的时态形式有更多的时态形式I had to leave the party early last night.I wasnt very well.You dont have to worry about that.The stude

15、nt will have to know how to use computers.第24页，共55页。4.must 开头的问句开头的问句否定回答用neednt 或dont have to 表“不必”，不可用mustnt.-Must I come back before 6p.m.-Yes,you must.-No,you neednt.No,you dont have to.第25页，共55页。-Must I come here tomorrow?-No,you_.mustnt B.dontA.C.neednt D.can not第26页，共55页。15-Who is there at th

16、e door?-It must be my brother.-It cant be your brother.It must be Xiao li.She bought a house with a garden.It must be expensive.她买了一套带花园的房子。一定很贵她买了一套带花园的房子。一定很贵。5.5.mustmust：表推测（十分肯定）：表推测（十分肯定）“一定一定，肯定，肯定”第27页，共55页。16-It must be John who is in the office.-Im sure it _ be John.I saw him at the bus st

17、op just twenty minutes ago.A.wontB.mustnt C.cantD.neednt 第28页，共55页。17Shall we talk?我们谈谈好吗？我们谈谈好吗？We should tell him the truth.我们应该告诉他真相。我们应该告诉他真相。should 表表劝告，建议劝告，建议，“应该应该”与与ought to 同义。同义。After that,you should list your experiences.We should learn how to use computers.You shouldnt feel unhappy.四四.s

18、hall.shall 表征求意见；表征求意见；should should 表应该表应该第29页，共55页。WINTERTemplate18ShallShall we dance?we dance?ShallShall we go for a walk?we go for a walk?Where Where shallshall I wait for you?I wait for you?What What shallshall I do now?I do now?ShallShall he come tomorrow?he come tomorrow?你要他明你要他明天来吗？天来吗？1.sh

19、all用于一、三人称疑问句。征求意见或请求。shall第30页，共55页。19If you do well in your study,you If you do well in your study,you shall shall get a gift.get a gift.（允诺）允诺）He He shallshall be punished for what he has done.be punished for what he has done.（命令）（命令）You You shallshall do it,whether you want to or not.(do it,whet

20、her you want to or not.(命令）命令）You You shallshall pay for it.(pay for it.(威胁）威胁）2.二、三人称：表说话人给对方的许诺、命令、警告、威胁.第31页，共55页。五五.Should 与与ought toshould=ought to(should:主观原因；主观原因；ought to：客观原因：客观原因)As students,we should study hard.He ought to be punished because he broke the law.第32页，共55页。201.should 与与ought

21、to should较主观较主观,而而ought to更为客观，表示一种社会公更为客观，表示一种社会公德方面的义务，强调责任、义务德方面的义务，强调责任、义务。As students,we should learn study hard.作为学生，我们应该努力学习。作为学生，我们应该努力学习。As a child,we ought to take good care of our parents.座位孩子，我们应该照顾好父母。座位孩子，我们应该照顾好父母。第33页，共55页。212.should 表示一种友好的忠告表示一种友好的忠告，而而ought to 却是一种训却是一种训示或警告示或警告。Y

22、ou should do good to others.你应该对人行善。你应该对人行善。You ought not to smoke.你不应该吸烟。你不应该吸烟。第34页，共55页。22我们应该每天练习说英语。我们应该每天练习说英语。We _ practise speaking English every day.在学校，我们应该值日。在学校，我们应该值日。We _ be on duty at school.她不应该违反校规。她不应该违反校规。She _break the school rules.她不应该花那么多钱买衣服。她不应该花那么多钱买衣服。She _ spend so much mo

23、ney on clothes.shouldought toought not to shouldnt 第35页，共55页。24Will you dance with me?Will you go with me?Will you give him a message when you see him?Will you pass me the butter?Would you like some tea?Would you water the plants while Im away?Would you tell us something about yourself?1.will1.will用

24、于第二人称疑问句，表请求或征求意见，would would 语气委婉六。六。willwould意愿意愿第36页，共55页。WINTERTemplate25I I will will tell you all about it.tell you all about it.We We willwill help him if he asks us to.help him if he asks us to.I I willwill do my best.do my best.They said that they They said that they wouldwould help us.help

25、 us.I promised that I I promised that I wouldwould do my best.do my best.I told Peter that I I told Peter that I wouldwould go along with him.go along with him.2.表意愿、意志，（wouldwould用于过去情况）第37页，共55页。26第38页，共55页。27第39页，共55页。28 第40页，共55页。29第41页，共55页。30第42页，共55页。31第43页，共55页。31 第44页，共55页。31第45页，共55页。32九九.

26、常用问答语常用问答语-May I have a dance with you?-May I have a dance with you?-Yes,you may.-No,you mustnt/cant/may not-Can you feel my heart?-Can you feel my heart?-Yes,I can.-No,I cant.第46页，共55页。33-Must I reply to you right away?-Must I reply to you right away?-Yes,you must./No,you neednt./dont have to.-Need

27、 I get you a glass of water?-Need I get you a glass of water?-Yes,you must./No,you neednt./dont have to.第47页，共55页。34-Will you have a talk with me?-Will you have a talk with me?-Yes,I will.-Yes,I will.-No,I wont/cant.-No,I wont/cant.-Could I use your phone?-Could I use your phone?Yes,of course you ca

28、n.Yes,of course you can.(肯定回答不能用肯定回答不能用couldcould)-Shall I have a talk with you?-Shall I have a talk with you?-Yes,you can.-Yes,you can.-No,you cant.-No,you cant.第48页，共55页。35-Who can it be?-It must be Mr Hu.I know him well.-It may be Mr Hu,but I am not sure.-It cant be Mr Hu,I saw him in the library

29、 just now.表示猜测表示猜测:must用于肯定猜测，用于肯定猜测，can用于否定疑问猜用于否定疑问猜 may表示不确定猜测表示不确定猜测第49页，共55页。第50页，共55页。第51页，共55页。第52页，共55页。第53页，共55页。14.-Why didnt Ken come to school today?-I dont know.He _ be sick.15.-Wheres Tom?-He _ be on the playground.I saw him there just now.16.-Where is Ellen?-She _ be in the hotel.But I am not sure.第54页，共55页。17._she go to the meeting?No,she _.A.must,shouldnt B.must,neednt C.may,couldnt D.need,cant 18.-Joe,you_ make that mistake again.-Sorry,I wont,sir.A.neednt B.mustnt C.wont D.might not.第55页，共55页。