情態(tài)動詞的教案

1、studying aims:情態(tài)動詞（ modalverbs）共 6 課 時 period 11. know more about the modal verbs.2. create the student s interests of english.3. master the usage about“ can.may.must.need.had better” and so on. studying important and difficult points:master the usage about“ can.may.must.need.had better”check list b

2、efore class:definition: studying procedure:step1.lead- in1.老師提問：情態(tài)動詞都有哪些？2.師生之間相互問候，引出情態(tài)動詞；step2:presentation一.情態(tài)動詞有 can could, may might, must, have to, shall should, will would,dare dared, need needed, ought t等o； 情態(tài)動詞無人稱和數(shù)的變化；不能單獨使用，必需與其后的動詞原形構(gòu)成謂語；二情態(tài)動詞的用法1. can 用法1）表示才能，與 be able to 同義，但 can 只用于現(xiàn)

3、在時和過去時，be able to可用于各種時態(tài)；two eyes can see more than one.注： can you.yes, i can / no, i cant.i ll not bebale to come this afternoon.當(dāng)表示 “經(jīng)過努力才得以做勝利某事”時應(yīng)用 be able to，不能用 can；如： he was able to go to the party yesterday evening in spite of the heavy rain.2. 表示答應(yīng)、懇求用 could 比 can 語氣更加委婉客氣，常用于could i /you.句

4、.型中，如表示同意時，用 can 回答而不用 could.could i borrow the book .no, you can t.-can i go now.- yes, you can. / no, you can t.此時可與 may 互換；在疑問句中仍可用could,might 代替，不是過去式，只是語氣更委婉，不能用于確定句和答語中；- could i come to see you tomorrow.- yes, you can. no, i m afraid not. 3. 表示估計“可能”（詫異、懷疑、不信任的態(tài)度）,常用于否定句 .疑問句 和感嘆句中； （can 表t示肯

5、定不是）can this be true.this can t be done by him. how can this be true.it can t be true.can it be true.4 表示客觀可能性（客觀緣由形成的才能）；they ve changed the timetable, so we can go by bus instead. this hall can hold 500 people at least.2. may 用法1）表答應(yīng)，懇求 = can表示許可或征求對方的許可，常于第一人稱連用；注： may i. yes, you may. no, you ca

6、n t / 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；在回答以 may 引起的問句時，多防止用這個詞，而用其它方式，如yes,please./ certainly.might 比 may 語氣更委婉，而不是過去式；否定回答時可用can或tmustn，t表示“不行以，禁止 ”；-might/ may i smoke in this room.- no, you mustn t.- may/might i take this book out of the room.- yes, you can. no, you can t / mustn

7、t. 2）表估計，可能、或許；常用于確定句中；might 不是過去式，它所表示的可能性比 may ??；1he may /might be very busy now.maybe he knows the news. = he the news.3）用于祈使句，表示希望；may you succeed.step3： do exercisesstep4:summary step5:homework do your exercises.step6： self-reflection教學(xué)反思：studying aims:period 21. know more about the modal verbs

8、.2. create the student s interests of english.3. master the usage about“ can.may.must.need.had better” and so on. studying important and difficult points:master the usage about“ can.may.must.need.had better”check list before class:definition: studying procedure:step1.lead- in step2:presentation3. mu

9、st1）表示義務(wù)；意為 “必需”（主觀意志）； we must do everything step by step.注： must i. yes, you must / no, you neednt dont have to .-must we hand in our exercisebooks now.-no, you needn/ tn. o,you don t have to.2）mustn 表t禁止、不答應(yīng)；you mustn t talk to her like that.3）表示揣測；意為“想必、準(zhǔn)是、肯定”等，只用于確定句； 否定、疑問句中 must改為 can.he must

10、 be ill. he looks so pale.she s wearing a diamond necklace. she must have a lot of money.注： must 表估計時，其反義疑問句與must 后面的動詞一樣； there must be something wrong, .4. need的用法need既可用作情態(tài)動詞，也可用作實義動詞；用作情態(tài)動詞時，主要否定句或疑問句中；用作實義動詞時，可用于各種句式；1). 用作情態(tài)動詞，用于否定句和疑問句中；a). need i. yes, you must / no, you needn t . need we fi

11、nish the work today . yes you .a. needb. canc. mayd. mustb). need + do sth . 變否定句： needn t do sth變疑問句： need sb do sth .2). 用作實義動詞a). need + to do sth .we need buy some school things .變否定句： don t /doesn t /didn t +need to do sth .變疑問句： do / does /did sb + need to sth .yes ,do/ does / didno, sb don t

12、/ doesn t /didn t.you don t need to do it yourself.b). 當(dāng)主語是物時； sth + need + doing sth = sth +need to be done . the table needs painting.=the table needs .5. had better 的用法1. had better + 動詞原形= it s best to do sth.you had better stay at home. = stay at home. 2. had better not +動詞原形we had better not p

13、lay the computer games.6. must, have to1) 表示必需、必要；you must come in time.在回答引出的問句時， 假如是否定的， 不能用 mustn （禁t止，不準(zhǔn)），而用 needn t, don t have （to不必） .- must we hand in our exercise books today.- yes, you must.- no, you don t have to / you needn t.2) must 是說話人的主觀看法，即說話人認(rèn)為必需干某事； 而 have to“必需，不得不”,就強(qiáng)調(diào)客觀需要 ,即外界因

14、素迫使某人不得不干某事；（外界緣由） ；must只有一般現(xiàn)在時，have to 有更多的時態(tài)形式；1 he play isn t interestinega,lliyrmust go now.一 2.i can t stop playing the computer gamefso. r your health, im afraid you .a. canb. mayc. mustd. had tostep3： do exercisesstep4:summary step5:homework do your exercises.step6： self-reflection教學(xué)反思：studyi

15、ng aims:period 31. know more about the modal verbs.2. create the student s interests of english.3. master the usage about“ can.may.must.need.had better” and so on. studying important and difficult points:master the usage about shall，“will ，would ”check list before class:definition: studying procedur

16、e:step1.lead- in step2:presentationusage:shall1用于第一人稱征求對方的看法，如：what shall i wear on the journey. 我路上穿什么好呢 . shall we dance. 我們跳舞好嗎 .2) shall 用于其次、三人稱時表承諾，警告，命令，威逼 現(xiàn)已少見 ，如： she shall get her share.她可以得到她的一份；you shall have it back tomorrow.你明天可以將它拿回；should一般不應(yīng)被認(rèn)為是情態(tài)動詞shall 的過去式，主要用法有： 1用于第一人稱疑問句中詢問對方的

17、意愿，但語氣較委婉溫順，如： what should we do now. 我們現(xiàn)在該怎么辦 .2表示應(yīng)當(dāng)、必需，常與must 換用；例如we should must master a foreign language at least.我們應(yīng)當(dāng)至少把握一門外語；3) “should+be表+ 語”的結(jié)構(gòu)，表示估計或詫異；例如：they should be back by now. 他們現(xiàn)在應(yīng)當(dāng)回來了吧；i am sorry that she should be so careless我.感到遺憾她竟會那樣馬虎；4) “should+have過+去分詞 ”的結(jié)構(gòu)，表示過去該做而實際上尚未做的動

18、作 或行為 ;其否定就表示發(fā)生了不應(yīng)當(dāng)發(fā)生的行為；其同義結(jié)構(gòu)“oughtto have +過去分詞 ”表,示過去 “早應(yīng)當(dāng) ”、“本當(dāng)”之意，語氣較強(qiáng)；例如 :i should have thought of that. 這一點我是應(yīng)當(dāng)想到的；但沒想到 they should not have left so soon他. 們不應(yīng)當(dāng)走得這么早；但已走了 5) 在 “it isnaturalstrange, natural,necessary, surprised, impossible,important that句”型中，主語從句中的謂語動詞要用should +動詞原形 ”表示“理所當(dāng)然 ”

19、、“古怪”、“必要”、“詫異”等的意思；在 lest以免、for fear that以防、in case以備萬一 等之后也要用 should+動詞原形 ;在 advise, sugest, order, demand, request等的從句中 should+do ”例如：it is necessary that heshould be sent there at once.有必要立刻派他到那里去；it is strange that he should say so.他會說這樣的話真是古怪；let us go at once lest we should be late for the tr

20、ain.我們立刻走吧，以免趕不上火車；will 和 would 的用法1表示意志，決心或愿望；例如：surely we will support all the people in the world in their struggle for peace.我們肯定要支持全世界人民爭取和平的斗爭；he would not let me try it .他不愿讓我去試；2will 表示常常性、習(xí)慣性、傾向性，would 表示過去的習(xí)慣行為；he will sit there hour after hour looking at the traffic go by.他會常常一連幾個小時坐在那兒觀看

21、來往的車輛；he would come to see me when he was in beijing.他在北京時，常來探望我；3用于其次人稱作主語的疑問句中，表示對對方的懇求，would 的語氣比will委碗would/will you kindly tell me the way to the station.請問到火車站怎么走 . 4表可能性this will be the book you are looking for.he would come to see me when he was in beijing.他在北京時，常來探望我； step3： do exercises st

22、ep4:summarystep5:homework do your exercises.step6： self-reflection教學(xué)反思：studying aims:period 41. know more about the modal verbs.2. create the student s interests of english.3. master the usage about“ can.may.must.need.had better” and so on. studying important and difficult points:master the usage ab

23、out shall，“will ，would ”check list before class:definition: studying procedure:step1.lead- instep2:presentationusage:情態(tài)動詞后跟完成式和進(jìn)行式的用法1. 情態(tài)動詞后跟完成式，表“原本應(yīng)當(dāng)干某事，而實際上沒干”i should have finished the work earlier.he isn t here. he must havessmeid the train.2. 情態(tài)動詞后跟進(jìn)行式， 即情態(tài)動詞 + be + v-ing 形式表示“想必正在 ”， “可能正在 ”

24、，“應(yīng)當(dāng)正在 ”，表示估計或評論某動作現(xiàn)在是否正在進(jìn)行 等意； it s twelve o clock. they must be having lunch.they may be discussing this problem. he can t be telling the truth.he must be playing basketball in the room. she may be staying at home.3. used to +v, be used to +v-ing和 be used to +v(1) used to +v意為“過去常常 ”， “過去始終 ”;be u

25、sed to +-ving / n 名詞意為“習(xí)慣于 ” ;be used to +意v 為“被用來 做某事 ”；(2) used to只表示過去，而be used to +v-ing / n可表示現(xiàn)在、過去或?qū)?；例如?he used to smoke. nowhe doesn t. 2hes quite used to hard work / working hard.3the knife is used to cut bread.4.表估計的情態(tài)動詞 句子的反意疑問句he must/may be in the room, isnt he. he cant be in the room,

26、 is he.he must have finished the work, hasnt he.he may have done the work last night, didn t he.三情態(tài)動詞的同義轉(zhuǎn)換.1. can = be able to2. must = have to3. needn t = don t have to4. need do sth = need to do sth .情態(tài)動詞語法講解：用作情態(tài)動詞的其他短語would rather, would sooner, would just as soon, had rather, had better, hadsoo

27、ner, can not but, may just as wel等l可用作情態(tài)動詞；例如：1) the soldier would sooner die than surrender.2) the brave soldier would as soon die as yield to such an enemy. 3i d rather walk than take a bus.4if you dont like to swim, you may just as well stay at home.注：這些短語后一般直接跟動詞原形.would had rather, would had so

28、oner, would just as soon后可跟 that 引導(dǎo)的從句， that 常省去，從句要用虛擬語氣；對現(xiàn)在和將來的假設(shè)用過去時，對過去的假設(shè)用過去完成時；例如：1i would rather you came on sunday.2i would sooner you hadn t asked me to speak yesterday.step3： do exercisesstep4:summary step5:homework do your exercises.step6： self-reflection教學(xué)反思：period 5exercises:情態(tài)動詞語法練習(xí)題1.

29、 may i stop my car here. no, you .a. can't b. mustn't c. needn't d. don't have to2. must we clean the house now. no, you .a. needn't b. may not c. mustn't d. can't3. john his father about his failure in the exam.a. dares not tell b. dares not tellingc. dare not tell d. da

30、res not to tell4. you return the book now. you can keep it next week if you like.a. can't b. mustn't c. needn't d. may not5. johnny, you play with the knife, you hurt yourself.a. won't.can't b. mustn't.mayc. shouldn't, must d. can't.shouldn't6. the fire spread thr

31、ough the hotel very quickly but everyone get out.a. had to b. would c. could d. was able to7. would you go out for a walk with me. no, i . my girl friend is coming.a. wouldn't b. shall not c. won't d. shouldn't8. man die without water.a. will b. can c. need d. shall9. if he started at 9

32、0'clock, he be there by now.a. need b. shall c. ought to d. must10. i mailed the letter two weeks ago. she it.a. must receive b. can't receive c. might receive d. must have received 11.the professor gave orders that the experiment before 5:30p.m.a. be finished b. will finishc. must be finish

33、ed d. would be finished12. there was plenty of time. you .a. mustn't hurry b. mustn't have hurriedc. needn't hurry d. needn't have hurried13. tom was a diligent boy. he go to school though it was raining hard. was able to b. could c. couldn't d. wasn't able to14. i go back be

34、fore lunch. no, i don't think you .a. need.must b. do.need to c. must.have to d. may . ought to15. the teacher do all the exercises, but a pupil .a. needn't.must b. may not.mustc. needn't.needn't d. can't.must16. would you open the window please . yes, i .a. will b. would c. do d

35、. can17. a lion only attacks a human being when it is hungry.a. should b. can c. will d. shall18. must i finish this novel this morning . no, you .a. mustn't b. might not c. don't have to d. can't19. the taxi only hold six passengers. it is full. you take the next one.a. may.may b. can.m

36、ay c. may.can d. must.can20. i a little earlier, but i met a friend of mine on the way.a. may come b. may have come c. could have come d. must have come21. i wish to go home now, i.a. may b. can't c. must d. do答案：1-10baccbdcadd11-20adacaaccbcperiod 6exercises:1.may i sit beside you, sir.- no, yo

37、u . my girlfriend is coming soon. can tb. may notc. needn td. shouldn t 2.- i speak to mary, please.-sorry, she come to the phone because she isn t in.a. might; wonbt. can t; mustn tc. may; can td. couldn t; shouldnt3. - i want to know if i _ smoke here.- no, you . could you see the sign“ no smokin”g can; needn tb. must; can tc. shall; won td. may; mustntthere.4. my wife never remembers my telephone number. she always look it up.a. mustb. shouldc. wouldd. has to5. - you pass me the english magazine, please.- sure. here you are.couldb. needc. mustd. might6. -must i go to work with you.- no,