modal verbs.pptx

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1、Chengdu Experimental Foreign Languages School Dong YaModal verbsModal verbsCan you list some modal verbs ?can, may, must could, might, shall, should, will, would, need, dare1. Ability (表能力)2. Possibility (表可能性/表推测)3. Obligation (表义务、责任)4. Requests, permission, suggestions, orders, prohibition(表请求、允许

2、、建议、命令、禁止)5. Determination, promise(表决心、允诺)近年来高考有关情态动词的考点分布近年来高考有关情态动词的考点分布推测、能力推测、能力必要性、义务、必要性、义务、责任责任请求、建议、命令、请求、建议、命令、禁止、拒绝、允许、禁止、拒绝、允许、允诺及其它允诺及其它2011年6322012年4252013年1002合计2059考点年份1. Can/could 1. Can/could 的用法的用法1 1、表示具备某种能力。、表示具备某种能力。The nine-year old boy can swim across the river. Can you swim

3、 across the river? We could/couldnt get the truck to start just now. The boy could swim when he was only 8 years old.Exercise:Exercise:A big fire broke out in that hotel last night. Luckily, everyone _ run out of the building. A. could B. was able to C. were able to D. canbe able to？was/were able to

4、 do=managed to do2、表示、表示“征询对方意见征询对方意见”和和“允许允许”（could could 语气委婉语气委婉, , 回答不用回答不用 could. could.）Can/Could you tell me where John is?_ I smoke here? Yes, you _. /No, you _. 3 3、表示推测的、表示推测的“可能性可能性”。（。（cancan表推测只能表推测只能用于否定句、疑问句用于否定句、疑问句 ） Can/Could it be true? 那会/可能是真的。That _ be true. 那不可能是真的。Will you an

5、swer the phone? It could be your mother. cant /couldntAny other modal verbs?Can/Couldcancant4.表示客观可能性。客观可能性。E.g. Monkeys are very lovely, but sometimes they can be very naughty.Exercise:Exercise:The weather in Chengdu is usually very good, but it _ be very hot in summer and very cold in winter. A. m

6、ay B. should C. could D. can2. May/might 2. May/might 的用法的用法1 1、表示推测、可能性，、表示推测、可能性，“也许也许”。You may/might have some fever. He said that the news might be true. They may/might be having a bath. 2 2、表示、表示“征询对方意见征询对方意见”和和“允许允许”。May I turn on the TV? Yes, of course. / Yes, you _. No, Im afraid not. / No,

7、you _. (,but Im not sure.)can/maycant/mustnt3. Must 3. Must 的用法的用法1 1、表示、表示“必须必须”、“禁止禁止”。Patients must use medicine according to the doctors orders.Children mustnt go across the street alone. * * * *注意对注意对must must 的问题的回答：的问题的回答：Must the ladies wear dresses? Yes, they _. No, they _. /No, they _. mus

8、tdont have toneednt2、表示推测，只用于推测，只用于肯定句肯定句。在否定句或疑问否定句或疑问句中，用句中，用can/couldcan/could：_there be a mistake? No, there _be a mistake. Look at his grey hair! He _ be over sixty now. Im not sure, but he _ be over sixty now._. They must be watching the news now. _. They cant/couldnt be watching the news now.

9、 Can/Couldcant/couldntmustmight3、表示表示“偏要偏要”。e.g. _ you play the piano now? Its 1 a.m. now!Exercise:Exercise: _ you make so much noise now? The baby is sleeping! A. Can B. May C. Must D. Should4. Should/ought to4. Should/ought to的用法的用法1.1.命令和禁止。命令和禁止。2. 2. 表推测。语气不如表推测。语气不如mustmust强，但比强，但比may, might,

10、couldmay, might, could强，强，表示主观推测出合乎情理的情况或结果，意为：按说应表示主观推测出合乎情理的情况或结果，意为：按说应该。该。E.g. He left home earlyhe _be here on time.3. 3. 表示表示“竟然、理应如此竟然、理应如此”。E.g. Its strange that she _ want to see me again after the fight! Its necessary that you _ go over the words and expressions before dictation. strange/o

11、dd/important/vital/essential/necessarystrange/odd/important/vital/essential/necessary/should/ought toshouldshould表示表示“推测推测”的表达法总结的表达法总结（1）表示对现在和将来状况的推测：must /may /might/could/should/cant +do。（2）对已经过去的情况的推测，用“情态动词have done”结构： must have done cant / couldnt have done may/might have done neednt have do

12、ne could have done should have doneshouldnt / oughtnt to have doneExercises:Exercises:He is obviously drunk. He _ have been drinking beer. He didnt go to the dinning hall today. The money _ have been lost there. Im not sure, but he _ have gone to bed. She looks so worried. She _ have solved the prob

13、lem.We _ have solved the problem in a more reasonable fashion, but we didnt pay too much attention to it at that time. You _have come here an hour earlier. The movie has been on for quite a long time now. She _ have gone there alone. Our parents were rather worried about us.cant/couldnt must cant/co

14、uldntmay/mightcouldshouldshouldnt 5. Shall 5. Shall的用法的用法1 1、shall shall 用在第一、三人称表示用在第一、三人称表示“征求意见征求意见”。Shall I go now? Shall we invite her, too? _ the reporters wait outside or what? 2 2、shallshall表示依据规定有义务去做。表示依据规定有义务去做。 Passengers shall not talk with the driver while the bus is moving.The school

15、rule says that all students _ wear the school uniform.3 3、shall shall 用于所有人称，表示说话人的许诺、威胁、用于所有人称，表示说话人的许诺、威胁、警告、命令等。警告、命令等。You shall have an answer by tomorrow. If he behaves well, he _ have a new watch for Christmas. If you dont do as I tell you, you _ go to the party. Shall shall shant shall 6. Wil

16、l6. Will和和wouldwould的用法的用法1 1、willwill可以表示可以表示“愿意愿意”，而非将来，而非将来: :I will pay you for it. 我会付给你钱买下它的。Go where you will. 到你愿意去的地方。Were going on a climbing trip. Come if you _. 2 2、willwill可以表示倾向、习惯（总是会，老是等意思）可以表示倾向、习惯（总是会，老是等意思）Sometimes the cat will lie there all morning. Oil and water will not mix. T

17、he door _ open.3 3、would would 可以表示可以表示过去的习惯过去的习惯（would would 可表示反复发生的动可表示反复发生的动作或某种倾向。作或某种倾向。used toused to表示过去的习惯动作或状态，强调现表示过去的习惯动作或状态，强调现在已不存在）在已不存在）He _come to see me on Sunday when he was here. When we were children, we _ go skating every winter. A. might B. should C. would D. mustwillwontwould

18、情态动词的其他用法要点：情态动词的其他用法要点：may well +domay as well +do May 表示祝愿。Practice makes perfect!表示表示“推测推测”的表达法总结的表达法总结（1）表示对现在和将来状况的推测：must /may /might/could/should/cant +do。（2）对已经过去的情况的推测，用“情态动词have done”结构： must have done cant / couldnt have done may/might have done neednt have done could have done should have doneshouldnt / oughtnt to have done