高中英语人教版 (新课标)必修3&4Unit 1 Festivals around the world教学演示课件ppt
展开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)
Underline the mdal verbs
Mst ancient festivals wuld celebrate the end f cld weather.It is nw a children's festival, when they can dress up If the neighbrs d nt give any sweets, the children might play a trick n them.
In Eurpean cuntries, peple will usually decrate churches She wuld never frget him.At the Spring Festival in China, peple may give children lucky mney in red paper.
1. 情态动词不能单独做谓语,后接动词原形。(除ught t; have t外)
2. 情态动词没有人称,数的变化,但有 些情态动词(如can, will)有一般式 和过去式的变化。
Mdal Verb I
may/mightcan/culdwill/wuldshall/shuldmust/can’t
can的主要用法是: 1. 表示能力: eg. The girl can dance very well. 2. 表示说话者的推测﹑事物的可能性: eg. Can the news be true? 3. 在口语中, 表示请求或允许: eg. Can I sit here?
culd的主要用法: 1. culd ---can的过去式, 表示与过去 有关的能力或推测: eg. I can speak fluent English nw , but I culdn’t last year.
2. culd可以代替can表示请求, 但语气较can客气、委婉: eg. Culd yu lend me yur dictinary? Culd I use yur bike? ★用culd 提问,答语用can (即:culd 不能用于现在时态的答语中) ---Culd I brrw yur pen? ---yes, yu can.
can和be able t辨析can(culd)和be able t都可以表示能力,意思上没有区别。但can只有现在式和过去式,而be able t则有更多的形式。如: Thse bags lk really heavy, are yu sure yu’ll be able t carry them n yur wn?
11 十一月 2021
may 的用法:1. 表示请求、允许(比can较为正式) eg. May I cme in ? Yu may g nw.★用may 提问,否定回答用 must nt (mustn’t) 禁止、阻止 had better nt 最好别 may nt 不可以
——May I smke here?——Yes, yu may. N, yu mustn’t N, yu’d better nt. N, yu may nt.
2. 表示说话人的猜测(肯定句和否定句) 含有“也许”“大概” “可能”之意。 My friend may arrive this afternn. 3. 表示祝愿; 但语气较正式: eg. May yu succeed! May yu have a gd jurney!
may 的过去时,表示可能性时,语气显得更加不确定。My friend might arrive this afternn.
Questin: will/wuld 是助动词还是情态动词? will 构成将来时-----助动词。 表示“意志”“决心”“请求”---情态动词。例: I will tell yu smething imprtant. 我要告诉你一件重要的事情。(助动词) Will yu tell her that I'm here? 请您告诉她说我在这儿,好吗?(情态动词)
will 和 wuld的用法
1、表示请求、建议等,用于第二人称 (用wuld比will委婉)Will yu please take a message fr him?Wuld yu please tell me yur telephne number?
2.表示习惯或倾向, 意为“总是”,“习惯于”。 eg: Fish will die withut water. Peple will talk. (人们总会说闲话。) When we wrked in the same ffice, we wuld ften have cffee tgether.
shall和shuld
shall 用法 表征求意见,用于一、三人称 , (疑问句) Shall we g by train, Mm? Shall he attend the meeting?
shall 用法 2.用于二 、三人称 的陈述句中,表威胁、警告、命令、允诺等语气He shall be srry fr it ne day, I tell yu. Yu shall d as I say. If yur children dn’t d as I tell yu, yu shall nt g t the party.
shuld 用法应该=ught t (劝告、建议) Yu shuld study hard. Yu shuld read his new bk.2. 表估计,可译为“按理应当”、“估计”。 Try phning Rbert, he shuld be hme nw.
shuld 用法3. 用于第一人称,询问意愿,语气温和委婉 Shuld I trust him? What shuld I d nw?4. 万一,用在if引导的条件句中,表示一件事听起来可能性很小,但也不是完全不可能。或直接用于句首。If I shuld be free tmrrw, I’ll cme.Shuld I be free tmrrw, I’ll cme.
shuld 用法5. “居然”,“竟然”,表说话人意料之外。 T my surprise, he shuld be a thief. Why shuld everyne want t marry Tny?
1. 必须,应该。 语气比shuld,ught t 强烈。 eg: Everybdy must bey the law. Yu mustn’t drive s fast in the street. 2. 表示有把握的猜测。“一定”、“准是”结构:must be eg: He must be an hnest by.
★用must 提问,回答方式 肯定回答:yes, please / I’m afraid s 否定回答 :needn’t / dn’t have t --Must I cme back befre ten? --N, yu needn’t.★表猜测的否定或疑问句用can/culd,不用mustn’t. If Mary didn’t leave here until 5:00, she can’t be hme yet.
----____ I g ut t play, mum? ----N, yu___. Yu shuld d yur hmewrk first. A. Might; wuldn’t B. May; had better nt C. Must; mustn’t D. Need; mustn’t
2. ---Where is Emma? ---I can’t say fr sure where she is, but she___ be ut shpping. A. can B. shuld C. must D. may
3. The rm is in a terrible mess; it ____ cleaned. A. can’t have been B. culdn’t be C. may have been D. wuld be
4. There ____ be any difficulty abut passing the rad test since yu have practised a lt in the driving schl. A. mustn’t B. shan’t C. shuldn’t D. needn’t
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 — What’s the name? — Khulaifi. _____ I spell that fr yu?(2006 北京) A. Might B. Wuld C. Can D. Shall
3 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
4 The 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
5 —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
6 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. night D. shuld
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