高中英语人教版 (新课标)必修3&4Unit 1 Festivals around the world图文ppt课件

这是一份高中英语人教版 (新课标)必修3&4Unit 1 Festivals around the world图文ppt课件，共36页。PPT课件主要包含了may，used to，isn’t he，hasn’t he，didn’t it，must，情态动词，may might，can could，无单三形式等内容，欢迎下载使用。
情态动词表示说话人的某种感情或语气，对某一动作或状态的某种态度。表示“需要、可以、必须、应当”等。
什么是情态动词？ (Mdal Verbs)
can/culd, may/might, must/ have t, shall/shuld (ught t), will/wuld need, dare/dared
情态动词的特点：1.情态动词自身都有一定的意义，但不能表示正在发生或已经发生的事情，只表示期待或估计某事发生。2.情态动词除ught和have外，后面必须接不带t的不定式。3.情态动词没有人称和数的变化,也没有非谓语形式。
1. can的主要用法是：  A.  表能力 eg. The girl can dance very well. be able t 通过努力做成某事 He was able t reach Munt Qmlangma in 2000. B.  表示说话者的推测﹑事物的可能性:(否、疑） eg. Can the news be true? C. 在口语中, can可以表示请求或允许： eg. Can I sit here?
1. can和culd
2. culd的主要用法是： A. culd 是can的过去式, 表示与过去 有关的能力和推测: We all knew that the yung man culdn’t be a dctr. B. culd可以代替can表示请求, 但语气较can客气、委婉:★culd 提问，答语用can ---Culd I brrw yur pen?---Yes, yu can.
may 常用来表示：  1. 在正式文体中表示请求、允许（比can正式）：:    eg. May I cme in ? Yu may g nw. 2. 表示说话人的猜测: “也许” “可能”: 通常只用于肯定句和否定句中。The guest may arrive this afternn.---Can he attend the meeting?---Yes, he____. I am nt sure.
2.may和might
3. 表示祝愿,位于句首 eg. May yu succeed! May yu have a gd jurney! 4. may as well=had better d (最好做某事） Yu’d better take ntes carefully. Yu may as well take ntes carefully.
3.will和wuld
will是助动词还是情态动词？ will用于构成将来时是助动词。 eg. I will tell yu smething imprtant. 我要告诉你一件重要的事情。 情态动词：1.表意愿或意志 I will never d it again. If yu will marry me, whatever I have is yurs, and mines is yurs.
2.提出 请求或建议 ,在疑问句中用于第二人称。 eg: If yu want help, let me knw, will yu? Will yu type this, please? ★祈使句问句与答语一般用will Open the dr, will yu? --- Please cme t my party. --- Yes, I will3. 表习惯或必然结果 Fish will die withut water. I will g t see my frmer classmates n weekends.
wuld & used t (过去常常，习惯于）wuld 现在有可能做，也有可能不做used t 现在一定没有做There used t be a big tree.I wuld g t the library when I was free.I _______ t cry when I was a child.
4.shall和shuld
shall 用法 1. shall表征求意见，用于一三人称 疑问句中 Shall we g by train, Mm? Shall he attend the meeting?2.用于二 三人称 的陈述句中，表威胁警告命令允诺等语气 Yu shall get a present when I came back. Yu shall be punished if yu break the rules.
shuld 用法应该=ught t Yu shuld study hard.2. 表万一，多位于句首。 Shuld he cme, I wuld let yu knw.3. “居然”，“竟然”,表说话人意料之外。 针对现在---- + V原 针对过去---- shuld have dne T my surprise, he shuld be a thief. He shuld have lied t me yesterday.
5.must的主要用法
1. 必须。must表主观“必须” have t 表客观“不得不” I must g hme this Saturday. I’ve gt a cld, s I have t see a dctr. ---Must I stay here? ---Yes, yu must./ N, yu needn’t./yu dn’t have t.★mustn‘t 表禁止，不准，一定不要。 Yu mustn't play with fire. Yu mustn't take drugs.
2. 表“偏要”“偏偏”，违背说话人意愿。 Must yu talk in class? ---Hw much d yu earn? ---I’ll tell yu if yu must knw it. 3. 一定，肯定 He must be crazy. He must have stayed up last night.4. 表推测的反应，反义疑问句中不能出现must的形式，反义形式取决于句中时态
1.He must be my English teacher,2. He must have finished his hmewrk,3. It must have rained yesterday,
表示推测——情态动词的重要用法
肯定的推测可能的推测否定的推测疑问的推测
对将来 对现在 对过去
can’t, culdn’t
+ V. + V. + have dne常见must be + be ding
+ V. + V. + have dne + be ding 可以用nt表示“可能不”
+V. + V. + have dne + be ding
+ V. + V. + have dne + be ding
Practice :表示推测——情态动词的重要用法
1. Yu must be Mr Smith----I was tld t expect yu here.2. He must have knwn what we wanted.3. We may have read the same reprt.4. He can’t have slept thrugh all that nise.5. There’s smene utside----wh can it be?6. What can they be ding?7. These pills might help t cure yur disease.8. Yu culd be right, I suppse.
1. I dn’t knw where she is. She _______ be in Wuhan. 2. At this mment, ur teacher ________________ ur exam papers. 这时, 我们老师想必在批改试卷。 3. The rad is wet. It ________________ last night. (rain) 4. Yur mther ______________________ fr yu.　 你妈妈一定一直在找你。5. Mike ________________ his car, fr he came t wrk by bus this mrning.　迈克一定还没有找回他的车, 因为早上他是 坐公共汽车来上班的。
must be marking
must have rained
must have been lking
Practice 2: Fill in the blanks.
can’t have fund
need & dare (dared)情态动词 ：need/dare d sthneed/dare nt d sth 实意动词： need/dare t d sthdn’t/desn’t/didn’t dare t d sth
1.Culd yu lend me yur bk?Certainly I I ask yu a questin?Yes, yu yu d me a favur?Of curse, I wuld yu like t d it fr me?Yes, I wuld like/lve t.
5.---Need I type this letter?---Yes , yu must./Yes , yu have t.(N, yu needn’t.)6.Must we d it nw?Yes, yu must./Yes, yu have t.(N, yu needn’t.N,yu dn’t have t.N, yu dn’t need t.)
1.Being afraid f making mistakes ,he ____ answer his teacher's questin A. desn't dare B. desn't dare t C. daren't t D. nt dare t 2.Having failed the exam, the little by __g hme and face his mm. A. dares nt t B. dares nt C. dare nt t D. dare nt
情态动词+have dne shuld/ught t have dneshuldn’t have dnemust have dnecan’t/culdn’t have dneculd have dneneed have dneneedn’t have dne
1 Children under 12 years f age in that cuntry ____ be under adult supervisin when in a public library. (2004 上海） A. must B. may C. can D. need
2 Sme aspects f a pilt’s jb_____ be bring, and pilts ften _____ wrk at incnvenient hurs. （2006 湖南） A. can；have t B. may；can C. have t; may D. ught t; must
3The weather turned ut t be fine yesterday. I _____ the truble t carry my umbrella with me. (2006 江西） A shuld have taken B culd have taken C needn’t have taken D mustn’t have taken
4 —Hw’s yur tur arund the Nrth Lake? Is it beautiful? —It ________ be, but it is nw heavily plluted. （2007 全国I） A. will B. wuld C. shuld D. must
5 I tld yur friend hw t get t the htel, but perhaps I have driven her there. （2007 陕西） A. culd B. must C. might D. shuld
7. (10湖南23) Yu ______ buy a gift, but yu can if yu want t.A. must B. mustn’t C. have t D. dn’t have t8. (10江西23) I have tld yu the truth. ______ I keep repeating it?A. Must B. Can C. May D. Will
9. — It’s the ffice! S yu _____ knw eating is nt allwed here. — Oh, srry. (2009湖南卷) A. must B. will C. may D. need10. What d yu mean, there are nly ten tickets? There _______ be twelve. (2009 全国卷I) A. shuld B. wuld C. will D. shall
11. I can’t leave. She tld me that I _____ stay here until she cmes back. (2009 全国卷II) A. can B. must C. will D. may12. He must be helping the ld man t water the flwers, _______? (2009 陕西卷) A. is he B. isn’t he C. must he D. mustn’t he
13. ---- Will yu g skating with me this winter vacatin? ---- It _____ . (2002上海) A. all depended B. all depends C. is all depended D. is all depending
解析: 答案B。It all depends 是“不确定”、“看情况”的意思。
根据汉语完成句子。
A: ____________________(我可以跟朋友 去) t the harvest festival? B: Yes, yu may. A: If I want t be a dctr, ____________ _______ (我应该学理科吗)? B: I think s.
May I g with friends
shuld I study
3. I dn't knw where she is, she _____ ___________ (可能在武汉). 4. At this mment, ur teacher _______________ (想必在批改) ur exam papers. 5. The rad is wet. It ________________ (肯定下雨了) last night. 6. Yur mther ______________________ ______ (一定一直在找你).
be in Wuhan
7. Philip ____________________________ __________________________(可能在车 祸中受了重伤). 8. ---Linda has gne t wrk, but her bicycle is still here. ---She ____________________ (可能上班) by bus.9. Mike _______________ (一定还没有找回) his car, fr he came t wrk by bus this mrning.
may (might) have been hurt
may (might) have gne
seriusly in the car accident