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1、.,1,情态动词,Modal verbs,.,2,常用的情态动词,can （could） may（might） shall（should） will （would） must dare （dared） need,have to ought to be able to used to,.,3,The features（特点) of the modal verbs: 1. 情态动词本身有词义, 但词义不完全. 2. 不能单独作谓语,只能和动词原形一起构成谓语. 3. 情态动词没有人称和数的变化( 除“have to”). 4. 没有不定式、V-ing 、V-ed 形式.,He can/could/
2、must/may/might/shall/ should/need/dare/dared/will/would/ought to/ used to + work in that factory.,He has to go home now.,He had to look after his sick mother.,.,4,在情态动词的使用中, 我们要注意以下考点:,1. 情态动词的基本用法。 2 .情态动词表推测的用法。 3. 情态动词+have done 的用法。,.,5,1.表“能力”,can ,could的用法,I can/ am able to swim. I could/ was
3、able to climb a tree when I was a child. I will be able to swim next week. The fire spread through the hotel very quickly but everyone was able to get out.,1. can 表示现在的能力,2. could表示过去的能力,3. be able to 表能力，可用于多种时态,4. be able to 强调成功地做了某事,.,6,2.表“请求,许可” could用来表示请求的时候比can 更委婉,Can you help me with my E
4、nglish? He said I could borrow his bike. Could I use your bike?, Could I borrow your dictionary? Yes, of course you _A. might B. will C. can D. should,.,7,3.表“可能性”,can ,could 用在肯定句中表示理论上的可能性，“经验之谈” As a human being, anyone can make a mistake. can ,could用在疑问句中表推测,表示可能性 Can she be in the classroom? ca
5、n ,could用在否定句中表推测，翻译成“不可能 ”,We thought the story couldnt be true.,.,8,1. Mary _ be in Paris，for I saw her in the town only a few minutes ago Amustnt Bcant Cshouldnt Dmay not,2. My MP4 player isnt in my bag. Where _ I have put it? A. can B. must C. should D. would,.,9,1.表“询问” (might比用may更客气.),May I ?
6、 (=Can I ?) Might I ? (=Could I ?) May I borrow your book?,may与might用法,May I pick a flower in the garden? _. A. No, you neednt B. Not, please. C. No, you mustnt D. No, you wont,.,10,注意： may I ? 的答语. 肯定: Yes, you may . 否定: No, you mustnt (语气强硬) No, you may not. 或 No, youd better not.,.,11,2.表“许可”,You
7、 may take the boy there He said that I might use his telephone., Might I watch TV after supper? Yes, you _. A. may B. must C. might D. could,.,12,3.表推测，表示主观上的推测，“可能，也许”，不用于疑问句, might比may的可能性更小,She may not like this place. Im afraid he might not like this place.,Peter come with us tonight，but he isnt
8、 very sure yet Amust Bmay Ccan Dwill,.,13,1.must 表示主观上的必须，应该，没有时态变化。 You must do everything as I do.,注意: Must I finish my homework today? Yes, you must. No, you neednt. / No, you dont have to.,must 的用法,.,14,“必须、不得不” must表示的是说话人的主观看法。 have to 表示的是客观需要。（是由于某种外界（客观）原因而“必须”，“不得不”做某事，也可表示经常的或习惯性的事“必须”做。）
9、 I have to be at my office every evening. 注意： 1.have to的否定形式dont have to表示不必。2.have to可用于多种时态中。,.,15,1. In crowded places like airports and railway stations, you_ take care of your luggage. A. can B. may C. must D. will 2. Must he come to sign this paper himself? Yes, he_. A. need B. must C. may D.
10、will,.,16,2. must表示肯定的推测。 The light is still on, so he must be at home.,Look at his new car. He _ have a lot of money. A. should B. shall C. may D. must,.,17,3.must表示“一定要”、“坚持” “偏要”、“偏偏” 。表示与说话人的愿望相反. If you must go，at least wait till the storm is over Must you make so much noise？你偏要弄出那么多噪音？,May I s
11、moke here ? If you _, choose a seat in the smoking section. A. should B. could C. may D. must,.,18,4. mustnt 表示禁止做某事。 You mustnt smoke in the office.,When I was young , I was told that I _ play with matches. A. wouldnt B. neednt C. mustnt D. darent,.,19,shall作助动词，用于第一人称，表示将来，should 是shall 的过去式We sha
12、ll start for Beijing tomorrow.,shall作情态动词 1： 用于第一人称和第三人称，表示征求对方意见或请求指示 Shall we begin our lesson? Shall I/she sit here?,shall与should用法,.,20,-Sir, _ he go or stay? -Let him go. A. will B. shall C. might D. could,2: shall 用于第二、三人称，表示允诺、警告、威胁、命令、决心等。 You shall have a nice present for your birthday. You
13、 shall be sorry for what you have done. When he comes in nobody shall say a word. Nothing shall stop us from carrying out this plan.,(允诺),(允),(警告),(命令),(决心),.,21,1. It has been announced that candidates(候选人) _ remain in their seats until all the papers have been collected. A. can B. will C. may D. s
14、hall 2. Excuse me, but I want to use your computer to type a report. You _ have my computer if you dont take care of it. A. shant B. might not C. neednt D. shouldnt,.,22,3). shall用于条约，规定，规章等文件中，表示一种义务，多用于第三人称中。,“The interest （利益） _ be divided into five parts, according to the agreement made by both
15、sides.” declared the judge. A. may B. should C. must D. shall,.,23,1. should= ought to 表示劝告，建议，意为“应该”， ought to 语气更强些，强调“有责任，有义务做”,A: Ill start the work tomorrow. B: I think you should start today. C: No, you ought to start at once. (语气更强）,should / ought to的否定形式表示“不应该” Children shouldnt smoke.,.,24,
16、Hows your tour around the North Lake? Is it beautiful? It _ be, but it is now heavily polluted. will B. would C. should D. must What time ought I _? Aarrived Barriving Carrive Dto arrive He _ speak to his mother like that. Aought not to Bdoesnt ought to Cnot ought to Dought to not,.,25,2. should 可表示说话人的感情如 “惊奇” “愤怒” “失望” “不满”等.翻译为“竟然，
