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Module 6 Grammar 導學案2Teaching Goals :1.Learn the rules of Modal Verbs. 2.Train the use of Modal Verbs. Teaching methods : Step 1. 情態(tài)動詞的定義:情態(tài)動詞有一定的詞義,表示某種感情和語氣,但不能單獨作謂語,要和其他動詞一起構成謂語。一般具備以下特點:1)有詞義 2)沒有人稱和數(shù)的變化3)后面必須跟動詞原形。Step 2. 情態(tài)動詞用法歸納 一、 can, could 與be able to1. 表示能力(體力、知識、技能)。 1).Can you lift this heavy box?(體力) 2).Mary can speak three languages.(知識) 3).Can you skate?(技能) 注意:此時可用be able to代替。Can只有一般現(xiàn)在時和一般過去式;而be able to則有更多的時態(tài)。 Ill not be able to come this afternoon. 當表示“經(jīng)過努力才得以做成功某事”時應用_不能用Can。 He was able to go to the party yesterday evening in spite of the heavy rain. 2. 表示請求和允許。 -Can I go now? - Yes, you can. / No, you cant. 此時可與may互換。在疑問句中還可用_,_代替,不是過去式,只是_,不能用于肯定句和答語中。 - Could I come to see you tomorrow? - Yes, you can. ( No, Im afraid not. ) 3. 表示客觀可能性(客觀原因形成的能力)。 Theyve changed the timetable, so we can go by bus instead. This hall can hold 500 people at least. 4. 表示推測(驚訝、懷疑、不相信的態(tài)度),用于疑問句、否定句和感嘆句中。 Can this be true? This cant be done by him. How can this be true? 二、 may, might 1. 表示請求和允許。might比 may語氣更委婉,而不是過去式。 否定回答時可用cant 或mustnt,表示“不可以,禁止”。 -Might/ May I smoke in this room? - No, you mustnt. - May/Might I take this book out of the room? - Yes, you can. (No, you cant / mustnt. ) 用May I.?征徇對方許可時比較正式和客氣,而用Can I.?在口語中更常見。 2. 用于祈使句,表示祝愿。 May you succeed! 3. 表示推測、可能性(不用于疑問句)。 might不是過去式,它所表示的可能性比may小。 1).He may /might be very busy now. 2).Your mother may /might not know the truth. 三、 must, have to 1. 表示必須、必要。 You must come in time. 在回答引出的問句時,如果是否定的,不能用mustnt(禁止,不準),而用neednt, dont have to(不必). - Must we hand in our exercise books today? - Yes, you must. - No, you dont have to / you neednt. 2. must是說話人的主觀看法, 而have to則強調(diào)客觀需要。Must只有一般現(xiàn)在時, have to 有更多的時態(tài)形式。 1).His play isnt interesting, I really must go now. 2). I had to work when I was your age. 3. 表示推測、可能性(只用于肯定的陳述句) 1).Youre Toms good friend, so you must know what he likes best. 2). Your mother must be waiting for you now. 四、 dare, need 1.dare作情態(tài)動詞用時, 常用于疑問句、否定句和條件從句中,過去式形式為dared。 1). How dare you say Im unfair? 2). He darent speak English before such a crowd, dare he? 3). If we dared not go there that day,we couldnt get the beautiful flowers. 2. need 作情態(tài)動詞用時, 常用于疑問句、否定句。在肯定句中一般用must, have to, ought to, should代替。 1).You neednt come so early. 2).- Need I finish the work today? - Yes, you must. / No, you neednt. 3. dare和 need作實義動詞用時, 有人稱、時態(tài)和數(shù)的變化。在肯定句中,dare后面常接帶to的不定式。在疑問句和否定句中,dare后面可接帶to或不帶to的不定式。而need后面只能接帶to的不定式。 1). I dare to swim across this river. 2). He doesnt dare (to) answer. 3). He needs to finish his homework today. 五、 shall, should 1.shall 用于第一人稱,征求對方的意見。 What shall we do this evening? 2.shall 用于第二、三人稱,表示說話人給對方的命令、警告、允諾或威脅。 1). You shall fail if you dont work hard.(警告) 2). He shall have the book when I finish it.(允諾) 3). He shall be punished.(威脅)4).You shall do as I say. (命令) 5).should,表示義務或責任常譯為應該。You should not break your promise.Im sorry that he should be so impolite(感情色彩)六、 will, would 1. 表示請求、建議等,would更委婉。 Will / Would you pass me the ball, please? 2. 表示意志、愿望和決心。 1). I will never do that again. 2). They asked him if he would go abroad. 3. would表示過去反復發(fā)生的動作或某種傾向。would表示過去習慣時比used to正式,且沒有“現(xiàn)已無此習慣”的含義。 1). During the vacation, he would visit me every other day. 2). The wound would not heal. 4. 表示估計和猜想。 It would be about ten oclock when she left home. 1.We _have bought so much food now that Sizie wont be with us for dinner. A. may not B. neednt C. cant D. mustnt2. We _the difficulty together, but why didnt you tell me?A. should face B. might face C. could have face D. must have face3. Its quite warm here: we _turn the heating on yet.A. couldnt B. mustnt C. neednt D. wouldnt4. Although this _sound like a simple task, great care is needed. A. must B. may C. shall D. should5. It is surprising that he _have been so foolish ; he never made such a mistake. A.must B. could C. should D. might6. Heres no light on; they _be at home.A. cant B. mustnt C. neednt D. shouldnt7.The man _go out for a walk after supper when he was young. A. would B. must C. might D. should 8. You _be hungry already you had lunch only two hours ago.A. wouldnt B. cant C. mustnt D. neednt9.-May I take this book out of the reading room?-No, you _.You read it in here. A. mightnt B. wont C. neednt D. mustnt 10. John, look at the time _you play the piano at such a late hour? A. Must B. Can C .May D. Need 11.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. shouldnt12.-I dont really like James. Why did you invite him? -Dont worry. He _come. He said he wasnt certain what his plans were. A. must not B. need not C. would not D. might not13. Shall I inform him of the change of the schedule right now? -I am afraid you _,in case he comes late for the meeting. A. will B. must C. may D. can14.I _worry about my weekend - I always have my plans ready before it comes.A. cant B. mustnt C. darent D. neednt15. Just be patient. You _expect the world to change so soon A. cant B. neednt C. may not D. will not 1.We _have bought so much food now that Sizie wont be with us for dinner. A. may not B. neednt C. cant D. mustnt2. We _the difficulty together, but why didnt you tell me?A. should face B. might face C. could have face D. must have face3. Its quite warm here: we _turn the heating on yet.A. couldnt B. mustnt C. neednt D. wouldnt 4. Although this _sound like a simple task, great care is needed. A. must B. may C. shall D. should5. It is surprising that he _have been so foolish ; he never made such a mistake. A. must B. could C. should D. might6. Heres no light on; they _be at home.A. cant B. mustnt C. neednt D. shouldnt7.The man _go out for a walk after supper when he was young. A. would B. must C. might D. should 8. You _be hungry already you had lunch only two hours ago.A. wouldnt B. cant C. mustnt D. neednt9.-May I take this book out of the reading room?-No, you _.You read it in here.A. mightnt B. wont C. neednt D. mustnt 10. John, look at the time _you play the piano at such a late hour? A. Must B. Can C .May D. Need11.Excuse me, but I wan

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