九年级情态动词专题复习讲义设计

1、情态动词的用法亠亠哉耳A?亠丿蓟f*it知识框架.定义:表示说话人的态度和看灌*ufft/rL*ftd/*agr回膏和程何num/cant表示肯否定推则“詞做情态訪词和实文动词用镒的区笊肯走世式香定简略形式shall/fhculd/ oii&lit- to情据词need /-（实丈动词had betterca/couldmust/have to習定形式乙知识梳理情态动词主要用于表示说话人的态度和看法。情态动词不能单独使用必须与动词原形一起构成谓语，其否定式是在情态动词后加否定词not。一般疑问句则将情态动词提至句首。二、基本形式:冃定式否定式简略否定式may mightmay not

2、might notmayntmightntcan couldcan not could notcan tcouldntwill,llwould, dwill not,ll notwould not,d notwontwouldntshall shouldshall not should notshan tshouldntmustmust notmustntn eedn eed notneedntought toought not tooughtnt to豊$三、基本用法1. can 的用法1）表能力can 表能力时意味着凭体力或脑力或技术等可以无甚阻力地去做某事I can climb this

3、 pole.我能爬这根杆子。He is only four , but he can read.他只有 4 岁，但已认得字了。Fire can t destroy go 火烧不毁金子。2）表可能性多用于否定与疑冋结构中，但也可用在肯定句中。Can the news be true?这消息可能是真的吗？It can t be tru 它不可能是真的。What can he possibly mean?他可能是什么意思？3）表示允许（和 may 意思相近）常见于口语。Can （May） I come in ? 我能进来吗？Can I smoke here ?我可以在这里抽烟吗？2.could 的用

4、法1）表过去的可能和许可，Father said I could swim in the river. 爸爸说我可以在河里游泳。2）表过去的能力I could swim whe n I was only six. 我刚六岁就能游泳。3）表允许”可表示委婉客气的提出问题或陈述看法，不是 can 的过去时态。-Could I use your bike? -Yes, you can ./No, you can t.注意：be able to 表示能力，意为 能够做成某事”相当于 can 的用法，但是有区别: 一般的能力；be able to 则主要指成功做了某件事的能力。3. may （might

5、 ） 的用法1）表示请求、可以、允许。You may drive the tractor.你可以开那台拖拉机。2）当回答由 may 引起的问题时，否定答语要用must not,表示 不许可” 不应该”May I come in? Yes, you may. No, you can t. No, you may not. No ,you mustn3）might 是 may 的过去式，语气比 may 更加委婉；can 泛指不行”。t4. must 的主要用法1）表示必须、必要We must do everything step by step .我们必须按部就班地做一切事情。Why must y

6、ou always bother me? 为什么你偏要打扰我呢。2）must be +表语的结构，通常表示猜测，含有一定”之意。（只用在肯定句中）He must be an hon est boy.他一定是个诚实的男孩。This must be your room. 这一定是你的房间。3）must 的否定式有两个：当回答由 must 引起的问题时， 否定答复要用 needn 或 don t have t 表示 必”、无须”、用 不着”、不一定”的意义。当表示 不应该”、不许可”、禁止时，就用 must not。Must I go tomorrow?明天我必须去吗？Yes, you must./

7、No , you needn t.注意：must= have to.但有区别：must 表示说话人的主观思想，have to 不得不 必须”表示客 观需要,客观条件只能如此。You must do it now. 你必需现在就干。（说话人认为必须现在干）I have to go now.（客观条件必须现在走）5. need 的主要用法1)need 作情态动词，表需要”，多用在否定式或疑问句中Need I atte nd the meet ing tomorrow?-Yes, you must./No , you needn t.-You n eed not hand in the paper

8、this week.2)need 也作实义动词，用法是need to do sth./sthHe needs to finish his homework in time.I n eed your help.3)need 主动表被动 的用法：sth needs doing=sth needs to be done.The room n eeds clea nin g.=The room n eeds to be clea ned.4)need 做名词的用法：6.should 的主要用法意思为 应该”。表示劝告、建议、命令，其同义词是ought to ;在疑问句中，通常用 should 代替 o

9、ught to。You should go to class right away.Should I ope n the win dow?meet one s needs=satisfy ones demarea) need of (急需)7. ought 应当；应该”。用法则 ought to do sth.You ought to read these books if you want to know how to repair the motorcar.8. shall 的用法意思为将要/应该”1)用于第一人称征求对方的意见，如：What shall I wear on the jou

10、rney? 我路上穿什么好呢？Shall we dance?我们跳舞好吗？9情态动词 will 和 would 的用法will (would) 表决心、愿望。would 为 will 的过去式，可用于各人称。ni do my best to catch up with them.ni n ever do it aga in, thats the last time.He said he would help me.注意:will, would 用于第二人称疑问句表示说话人向对方提出请求或询问，用 would 比 will 更婉转,客气。10. may be 与 maybe二者都有 或许，也许”

11、的意思，但用法不同：(1) . may be 是情态动词，只能用于句子中，女口： It s eight o clock now. My father may be at home.(2) . maybe 是副词，相当于 perhaps, probably, likely，常用于句首。女口： It s eight o clock now. Maybe my father is at home.11.had better 最好.had better do sth. / had better not do sth.(重点)You had better keep sile nt in class.(一

12、)、can, may, must , need, should 的提问与应答:(1). Can I go to the cin ema toni ght?Yes, you can ./No, you can(2). May I have a look at your photos?t.t / can t.Yes, you may / can ./No, you mustn(3) . Must I book a ticket for the concert right now?Yes, you must./No, you needn t / don t have to.(4) . Need I

13、water the flowers in the garde n in the after noon?Yes, you need / must./No, you mustn t.(二)、表示判断：may / may not, must ( be ) / can t ( be )(1) .判断语气坚定，有理有据(常摆出理由).肯定判断 (must )e.g. The light in the office is on. Our teacher must be still work ing.It must have rained last ni ght, for the gro und is we

14、t and muddy.否定判断(can t / can nbt 注：不能用 must not 或 mustn 形式e.g. Mr. Green can t be at home, for I met him at the street just now.This book can t be Betty s. She doesn t like detective stories.(2) .判断语气不坚定，模棱两可，不确定，常附带有I m not sure / I don 等句 kftowe.g. How soon will your father come back home from Lon

15、don?May be in a week, but I m quite not sure.三*课堂练习Grammar -modal verbI.Choose the best answer.选择填空。1. Tom gets up early every day except Saturday or Sun day, because he_ go to school.A. mustntB. needntC. shouldntD. cant2. Tha nks to the first developme nt of com mun icatio n tech no logy, people in

16、 Chinamake phone callsany where at any time.A. shouldB. wouldC. mustD. can3. A ngela n eeds to dow nl oad“Tran slat ing App”whe n she visits Spain. She_ speak a sword.A. mustntB. cantC. needntD. shouldnt4. Can I fish here?No, you_. The sign says,“No fishing.”A. mustntB. needntC. may notD. shouldnt5.

17、If time allows, we_ take a walk along the view path and take some photos.A. canB. n eedC. mustD. ought6. Mum told me that I_be afraid of difficulties and should lear n to be brave.A. didnt needB. neednt toC. needntD. not need7. This notebook_be Toms. Look at his name on the cover.A. mustB. mustntC.

18、canD. cant8.0ur road in formatio n system should be improved so that we_ know the road con diti on ahead oftime.A. mustB. shouldC. canD. could9. By the time Jack was ten, he_speak Greek and Germa n flue ntly.A. wouldB. shouldC. mightD. could10. All passe ngers_ go through safety check before they take the un dergro und.A. canB. mayC.