【通用版】中考英语总复习:情态动词ppt课件-专项超详细讲解.ppt
《【通用版】中考英语总复习:情态动词ppt课件-专项超详细讲解.ppt》由会员分享,可在线阅读,更多相关《【通用版】中考英语总复习:情态动词ppt课件-专项超详细讲解.ppt(87页珍藏版)》请在淘文阁 - 分享文档赚钱的网站上搜索。
1、情态动词情态动词情态动词情态动词具有一定得词义,没有人称和数的变化,不能单独构成谓语,和谓语动词连用表示委婉语气或表示愿望、态度或推测等意义。一、情态动词的类型和特征一、情态动词的类型和特征1. 情态动词的类型1) 只作情态动词的有:must; can(could);may(might)2) 只作情态动词也可作实义动词的有:need , dare3) 可作情态动词也可作助动词的有:will(would); shall(should)4) 具有情态动词的某些特征的有:have to; ought to; had better2. 情态动词的特征(1). 有一定的词义,但不能单独作谓语,必须和行为
2、动词或系动词连用,构成谓语。(2)表示说话人的态度或语气,无人称和数的变化(have to例外,其第三人称单数形式为has to)He has to walk home.情态动词后面跟的动词须用原形。二、情态动词的用法二、情态动词的用法1. Can的 用法 常用来表示能力,意为“能,会”。 eg:She can swim fast, but I cant.表示请求或许可,意为“可以”。 eg: Can you go shopping with us?表示推测,意为“可能”,常用于否定句或者疑问句中,此时cant 意为不可能。 eg: Can the news be true? That can
3、t be our teacher. He is on a visit to the Great Wall.-I think Miss Gao must be in the library. She said she would go there.-No.She _be there. I have just been there.A. cant B. mustnt C. neednt D. wouldnt 4) cant 可用来作May I .?的否定回答-May I go surfing alone this afternoon?-No, you cant . Its dangerous.5)
4、 can和 be able to 两者都是表示“能力”是用法相同,但can只有原形和过去式could两种形式,其他时态要用be able to来表示。另外,be able to常常有“成功做了某事”的意味Jim cant speak English.We were able to reach the top of the maintain at noon.2. Could 的用法 can的过去式,意为“能,会”,表示过去的能力。eg: He could write poems when he was 10. could 在疑问句中,表示委婉的语气,此时could没有过去式的意思。 eg: Co
5、uld you please speak a little louder? Could I use your pen? Yes, you can/ No, you cant .-Could I cross the street here?-Of course you _.A.could B. canC. are able to D. will3. may 的用法 may 表示请求、许可,意为“可以”,比can要正式。eg:May I ask you a question? You may go home now. 表示推测,谈论可能性,意为“可能、也许”,一般用于肯定句。eg:It may r
6、ain tomorrow. She may be at home. may 的过去式为might,表示推测,可能性低于may。eg:He is away from home. He might be sick.(4) may表示祝福May you be happy!(5)can和may 1) Can和may均可用来征求意见或许可,意为“可以”,一般可互换使用Can/May I help you?2)may 和can 表示可能性时的区别:在肯定句中用may, might, 不用can;在疑问句中表示推测用can;在否定句句中用cant(不可能)She may be in the classroo
7、m.Where can they be now?That cant be true.(6) may be 和 maybe 用法区别 常用位置may be may 为情态动词,be动词原形 句中,做谓语maybe 副词,大概、也许, 相当于perhaps 句首,作状语He may be wrong, but Im not sure.-Have you decided which senior high school to choose?-Not yet. I _go to Moonlight School.A.must B.mayC.need D. should-What will the we
8、ather be like tomorrow?-It _be rainy, cloudy or sunny. Who knows?A. must B. mightC.shall D. should 情态动词练习 1讲解1.-_I have a look at your new watch?-Yes, please.May B. Need C. Dare D. Must 2.Tom is young but he _fly a kite by himself. may B. can C. need D.must3.The work is too hard for him. He _finish
9、it on time.cant B. mustnt C. shouldnt D. neednt 4. The bookstore was open, so I _buy the book.can B. cant C. did can D. was able to5. Last year I _drive. I used take the bus. could B. couldnt C. should D. shouldnt 6. -Could we smoke here?-Im afraid you _.couldnt B. cant C. are able to D. will7.-I he
10、ar youve got a new iPhone 4S._ I have a look?-Yes, certainly.May B. Do C. Shall D. Should 8.-Wheres Lucy?-Im not sure. She _in the school library.maybe B. must be C. may be D. will be9.-Where is Tom? -_he is at home. He didnt feel well yesterday. May be B. Maybe C. May 10.-_ I swim here? - Im sorry.
11、 Children _swim alone hereMust; cant B. May; mustCan; mustnt D. Cant; can4. Must 的用法 must表示“一定要,必须”。否定形式是mustnt,表示 “禁止,不许可”。 eg:You must stay here until I came back. You mustnt park your car in front of the entrance. 对must引导的疑问句,肯定回答为must,否定回答为 neednt或者dont have to。 eg:-Must I finish my homework now
12、? -No, you neednt. must 常常指有根据的,比较有把握的推测,意为 “一定是,准是”,这种用法只能用于肯定句当中。 eg:The light is on. He must be at home now. 当must表示肯定判断、推测的时候,其反意疑问句要用实际问句的助动词来构成。 eg:She must have finish writing, hasnt she? must 和have to must侧重于个人意志和主观上的必要,意为“必须,应 该”。 eg:I know I must study hard. have to 侧重于客观上的必要,意为“不得不”。它有一 般
13、现在时第三人称单数形式has to 和过去形式had to。 eg:My brother was very ill, so I had to call the doctor at midnight. have to的否定形式是dont have to, 相当于neednt, 意为“不必”;mustnt 表示“禁止,不允许”.(5) cant 和 mustnt 表否定推测时应用cant, mustnt 意为“禁止,不允许”,不用来表推测,在肯定句中用must表推测,意为“一定”- Mom, must I clean my room now?- No, you _.You can do it to
14、morrow.A.cant B. neednt C. mustnt D. shouldnt 5.need 的用法 need表示“需要,必须”,主要用于否定句和疑问句当中,否定形式为neednt,意为“没有必要,不必”。用need提问时,肯定回答是must,否定回答为neednt. eg:-Need I stay here any longer?need可作实义动词,此时还有人称,数和时态的变化,后面多接动词不定时。eg:I need to do it right now. He needs to learn more about the girl.注意: 对need 的词性判断常为难点,nee
15、d后加to do说明need为实义动词,用助动词提问或否定;need后加doing表示被动意义;若need 后加do的动词原形,则need为情态动词You neednt see him, but I must.You dont need to come if you feel sick.(6). dare 表示 “敢于”, 用作情态动词时,无人称变化,只用于否定句、疑问句和条件句Mary dare not touch the snake.用于实义动词时,要注意人称和时态的变化,后面跟不定式I have never dared to tell him about it. 注意:dare作实义动词
16、时,其疑问句或否定句后面的不定式符号常省略。 He didnt dare (to) disobey.You _ swim in this part of the lake. Its dangerous.A.mustnt B. neednt C. wont D. may not I enjoy the party very much, but I _ go home. Its too late.A . have to B. mayC. mustnt D. shouldt 6. shall, should, will, would的用法 shall常用于疑问句当中,表示征求对方的意见(多用于第一、
17、三人称),用在第一人称或第三人称的疑问句中 eg:shall we go out for a walk? Shall he come at once?一般回答: Yes, please./ All right./ No, thank you. Shall用于第二、第三人称,表示说话人给对方命令、警告、允诺或威胁。 eg: You shall fail if you dont work harder. (警告) He shall have the book when I finish reading. (允诺) He shall be punished. (威胁) should意为“应该”。可表
18、示劝告、建议、义务、责任等。 eg:We should protect the environment. will表示主语的决心或意愿;也可表请求或询问,用于第二人称。 eg:I will never do that again. I will help you if Im free this afternoon. Will you pass me the book? will表示习惯、请求,固有性质等。 eg: Everyday he will sit here hour after hour doing nothing.(习惯) Will you help me with my Engli
19、sh?(请求)7. had better的用法had better 意味“最好”,没有人称的变化,后接不带to的不定式,其否定形式为had better not. eg: We had better go now. You had better not give the book to him.- How was the youth club last night, Mark?-It was great fun. You _have come.A.Must B. can C. should D. mayYou look tired now. You _stay at home and have
20、 a rest.A.had to B. had betterC. would like to D. would ratherPS: 在英语中,我们可以用其他多种方式提出我们的建议或征求对方意见。(1).用“Lets do.”来提出建议。e.g. Lets go for a walk after supper.(2).用“What/How about.?”来提出建议;about后接名词或动词ing形式。e.g. What about/How about a drink? What about/How about taking Tom with us?(3).用“Why not.?”来提出建议,表
21、示“何不”not面后接动词原形。“Why not.?”实际上是“Why dont you/we.?”的简略形式。 e.g. Why not meet at the school gate at eight? Why dont we stay here another day?(4).用“Would you like.?”来提出建议,意思是“你想要吗?”Would you like后可接名词或不定式。如: Would you like a cup of tea? Yes, please. No, thank you. Would you like to go and see her? Yes,
22、Id like to. No, thank you “去游泳好吗?”Shall we go for a swim?Lets go for a swim,shall we?What about/How about going swimming?Why not go for a swim?Would you like to go for a swim?willwill在there be句型中的形式及其句式变换。将有 由于“一般将来时”的结构可以用“will+动词原形”来表示, 所以there be句型的一般将来时的形式就是there will be。(一定不能说there will have)Th
23、ere are many students in our school.There will be many students in our school. 含有情态动词的疑问句的回答1. 对may引出的问句,可以有下列回答方式: Yes,you may. Yes, of course. Yes, certainly. Sure .No, you mustnt. No, you cant.2.对must引出的疑问句,回答方式为: Yes, must. No, neednt/ dont have to.3.could在疑问句中,表示委婉的语气,此时could没有过去式的意思。e.g. Could
24、 I use your pen? - Yes, you can./No, you cant.4. shall引出的疑问句用于第一人称或第三人称中,表示征求对方意见或客气的请求。其回答方式有以下几种: Yes, please.All right.No, thank you.5. would you的回答方式有以下几种:Yes, I will. (No, I wont.)Sure . (Im sorry , I cant.)All right/ OK/ With pleasure.Certainly. (No, thank you .)Yes, please.Would you like to g
- 配套讲稿:
如PPT文件的首页显示word图标,表示该PPT已包含配套word讲稿。双击word图标可打开word文档。
- 特殊限制:
部分文档作品中含有的国旗、国徽等图片,仅作为作品整体效果示例展示,禁止商用。设计者仅对作品中独创性部分享有著作权。
- 关 键 词:
- 通用版 中考 英语 复习 情态 动词 ppt 课件 专项 详细 讲解
限制150内