译林牛津英语模块四.pptx

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1、情态动词没有人称和数的变化，有词义，但是不完整，不能单独做谓语，必须和不带to的动词不定式连用。abilitycertaintypermissionobligation make requests make suggestions make offers give advice 能力能力义务义务,责任责任确定确定允许允许 提出提出请求请求 提出提出建议建议提供提供帮忙帮忙提出提出忠告忠告Modal verbs:general introduction第1页/共26页(1)He can run the 100m sprint in 11 seconds.(2)Can this little gi

2、rl read before she goes to the primary school?abilitycan表示可能性时，指的是理论上的可能，它通常不用来表示某事实际发生的可能性或真实性。如：Accidents can happenAnybody can make mistakescan/be able to第2页/共26页can/be able toability在过去时态的肯定句中需要某种条件或努力做成某事，我们要用waswere able to而不能用could。如：It was a holiday and the children were able to go to the se

3、aside The girl worked hard so she was able to pass the final testIm sorry I havent been able to play tennis with you recently.第3页/共26页obligationought to/shouldought to与should意思接近，大多数情况下二者可以互换，但是should谈的是自己的主观看法,用于各种人称。ought to则更多反映客观情况，在谈到法律、义务和规定时使用。如：We shouldought to help each other and learn fro

4、m each other in our workYou shouldnt spend so much time playing.She is your mother,so you ought to support her Ought he to go?Yes,I think he ought(to).第4页/共26页have to/mustobligation must与have to都可以表示“必须”的意思，但要注意以下两点区别。1)must只有现在时，而have to有现在时、过去时和将来时。如：We must work hard,or well fail in the examinati

5、on Two years ago,the poor girl had to leave school for lack of money 第5页/共26页2)must表示主观看法，have to则侧重于客观需要。如：We must be strict with ourselves in everything In cities with many cars,some people have to wear masks obligationhave to/must第6页/共26页She might win a medal at the Olympics.She may be at home no

6、w.She could read and write at the age of 4.She should come to join us.She ought to/will/must help me whenever I am in trouble.certaintymight/may/could/should/ought to/will/must very uncertaintyalmost certainty第7页/共26页can/could/may/might could比can 更委婉，might比may 更委婉-Can I watch the Olympics?-Yes,you c

7、an.No,you cant.-May I watch TV after finishing my homework?-Yes,you may./No,you mustnt./No,you may not./No,youd better not.permissioninformal/spokenformal/written第8页/共26页-Will/Can/Could/Would you help me with my training?-Yes,I will/can/can/will.will/can/could/wouldmake requestsinformal formal 第9页/共

8、26页make suggestionsshall常用于第一，三人称，表示征求对方意见。-Shall we/I/he/she/they do some exercise this morning?-Yes.-Shall he come in?-Ok.第10页/共26页make offersIll wash your sports jacket.Shall I get a ticket for you?Shall we carry the books for you?Shall I clean the blackboard for you?give adviceYou should not/oug

9、ht not to eat a lot before swimming.The students should spend all their time working at their lessons.第11页/共26页和其他时态的连用The boys may be playing football on the playground.The boys may have finished their homework by the time school is over.He plays basketball very well.He must have practiced it a lot

10、.Our headmaster must have been to USA,for he knows the country so much.第12页/共26页must have done 的反意疑问句You must have seen the film,havent you?You must have seen the film last week,didnt you?His parents must have beaten him,havent they?His parents must have beaten him yesterday,didnt they?第13页/共26页shal

11、l可以用来征求对方意见。用于第一、三人称。此外它也可以用来表示说话人的命令、警告、允诺、威胁或决心等，这时它用于第二、三人称。如：Shall she go to the concert with us this evening？(征求意见)You shall go to the front at once(命令)Dont worryYou shall get the answer this very afternoon（允诺）He shall be sorry one dayI tell you(警告)Nothing shall stop us from fighting against po

12、llution(决心)shall/will第14页/共26页will在肯定句中表示意愿或决心时，是可以用于条件状语从句的。在疑问句中用于第二、三人称表示意愿。如：Will you go hiking with me in the mountain?Will he pay for me?If you will listen to me,Ill give you some advice on how to learn English If you will come this way,the manager will meet you shall/will第15页/共26页mustnt/needn

13、tmustnt 解释为“不准，不许”，语气强烈；neednt“不需要，没必要”，语气缓和。You mustnt miss this football match.Its very important.You neednt watch the game if you dont want to.-Must we clean the classroom?-Yes,you must./No,you neednt.第16页/共26页need/dare作为情态动词时，两个词常用于疑问句和否定句。-Need I help you?-Yes,please.You neednt telephone him no

14、w.How dare you talk to the teacher like that?The girl dare not go out alone at night.第17页/共26页用作实义动词时，可用于各种句式We need to tell him the news.You dont need to tell him the news.Do the flowers need watering?I didnt dare to tell you the truth.Would you dare to catch the snake with your hand?The boy dares

15、to do anything he likes.need/dare第18页/共26页Have a try!Have a try!第19页/共26页1.A left-luggage office is a place where bags _be left for a short time,especially at a railway station.A.should B.can C.must D.willB2.How _ you say that you really understand the whole story if you have covered only part of th

16、e article?A.can B.must C.need D.mayA第20页/共26页3.-The room is so dirty._ we clean it?-Of course.A.Will B.Shall C.Would D.DoB4.My English-Chinese dictionary has disappeared.Who _ have taken it?A.should B.must C.could D.wouldC第21页/共26页5.-I hear youve got a set of valuable Australian coins._ I have a loo

17、k?-Yes,certainly.A.Do B.May C.Shall D.ShouldB6.I was really anxious about you.You _ home without a word.A.mustnt leave B.shouldnt have leftC.couldnt have left D.neednt leaveB第22页/共26页7.-Are you coming to Jeffs party?-Im not sure.I _ go to the concert instead.A.must B.would C.should D.mightD8.Sorry,I

18、m late.I _ have turned off the alarm clock and gone back to sleep again.A.might B.should C.can D.willA第23页/共26页9.-When can I come for the photos?I need them tomorrow afternoon.-They _ be ready by by 12:00.A.can B.should C.might D.needB10.The fire spread through the hotel very quickly but everyone _ get out.A.had to B.would C.was able to D.couldC第24页/共26页11.When he was there,he _ go to that coffee shop at the corner after work everyday.A.would B.should C.had better D.mightA12.I wonder how he _ that to the teacher.A.dare to say B.dare saying C.not dare say D.dared sayD第25页/共26页感谢您的观看！第26页/共26页