高二英语上学期unit13Modalverbs.pptVIP

be made up of all the way take advantage of range from break down add to that is mix with contribute to benefit from,1. Temperature here_10 to 30 . 2. A volleyball team consists of Six players while a football team _eleven players. 3. He is a hero, so you will _ his good example. 4. You can _ her offer to drive you home. 5. The talks between those two big companies _ so the two managers had to look for another trade partner respectively.,ranges from,is made up of,benefit from,take advantage of,broke down,be made up of all the way take advantage of range from break down add to that is mix with contribute to benefit from,6. The engine of the ship was out of order and the bad weather _ the helplessness of the crew at sea. 7. Its now twenty minutes past four, _, the doctor has gone for two hours. 8. Uncle Smith followed him _ down the street. 9. The powder is then _ water and other things, and made into different kinds of food. 10. The chairman encouraged everyone to _ the discussion.,added to,that is,all the way,mixed with,contribute to,Grammar,Modal verbs,的 特点 1）有特定的词义,表明说话人的某种态度. 2）没有人称和数的变化 3）其后加动词原形(do)；have done ；be doing,情态动词,情态动词,常用的情态动词有:can/could,may/might, must/have to, should/ought to Will/shall/would, need/dare, be able to,had better, would rather,1.区别must / have to must 表示人在主观上认为的必要、必须、一定要 have to 表示受环境或习惯支配的客观必要 “不得不”，能用于更多时态。 1)Soldiers _obey officers. 2)Its raining outside.We_stay at home. 3)As he had broken his leg， he _lie in bed.,易混易错用的情态动词,must,have to,had to,其否定式mustnt表示“不准，禁止” Johnny ,you mustnt play with the knife,you may hurt yourself. 而dont have to=neednt,2.should / ought to 的区别,should 表示主观看法“应当” ought to 表示应该，语气比should重，含有 “按道理应该”,反映的是客观情况。 1) We _help him for we are his friends. 2)You are her son, you _look after her. 3) You ought to obey the rule.(变否定句，疑问句),should,ought to,You ought not to obey the rule. Ought I to obey the rule?,3.表示能力: can, could, be able to *be able to 能用于各种时态。 can / could 只能表示现在或过去的能力。 *was / were able to : “设法做成某事” 相当于 managed to do sth. succeeded in doing sth.。 Eg. Though they were trapped in the big fire, they _escape.,were able to,4.need/dare可用作情态动词,没有人称和数的变化;也可以用作实意动词. Nobody dare say that to his face.=Nobody dares to say that to his face. If you have something important, you neednt come here.(dont need to come),5.Will表意愿 “愿意”的意思 If you will eat much，you will get fat.,shall用作情态动词，可与二，三人称连用，表示“允许，命令，威胁” Shall my daughter do shopping for you？ You shall obey my orders.,6.注意对need问句的回答: -Need I finish the work today? -Yes, _. No, _. No, _.,you must,you neednt,you dont have to,-Shall I tell John about it? -No, you _. -Must we do it now? -No, you _.,neednt (dont have to),neednt (dont have to),7.情态动词表推测的用法,must+do “一定，准是” 否定用cant 疑问用can Your father must be expecting you home. -Can that man be headmaster? -No,he cant be headmaster,for he has gone to Beijing. must +have done“一定已经” 否定式cant have done may/might +do“可能” may/might+have done“可能已经” should+do“应该”,例1： -Are you coming to Jeffs party? -Im not sure. I _go to the concert instead.(NMET2000) A. must B. would C. should D. might,析：选D。Im not sure.的语境表明把握性不大，当然我去参加音乐演奏会的可能性就比较小了，故不用must应用might,例 2： -_the news be true? No, it_be true. A. Can, cant B. May, cant C. May, may not D. Must, mustnt,析： 选A。因为前半句是疑问句，后半句为否定句，两空都不能使用may/might 和must，应而用can和cant。,8、情态动词+完成式的用法,（一）should /ought to have done 本来应做而未做，表达遗憾感情色彩,例1：I told Sally how to get there, but perhaps I _for her.(NMET94) had to write it out must have written it out C. should have written it out D. ought to write it out,析： 选C。分析语境可知，口头上告知Sally如何去那里是不够的，所以我本应书面告知，却有没书面告知之，显得应使用should /ought to have written表示遗憾之情。,例2： I was really anxious about you, you _ home without a word.(NMET2001) A. mustnt leave B. shouldnt have left C. couldnt have left D. neednt leave,析: 选B。 由语境可知，我真的为你担心，所以你不应该一句话不说就离开家，但实际上你确实这么做了，显然应填shouldnt/ought not to have left，表示责备。,（二）对过去情况的推测 must have done 一定已做 may/might have done可能已做 cant have done不可能做,例1：-Where is my pen? -I _ it.(NMET88) A. might lose B. wouldnt have lost C. should have lost D. must have lost,例2： The light in his room is still on, so he _ to bed. A. mustnt have gone B. must have gone C. shouldnt have gone D. cant have gone,析：选D。由于他房间里的灯还亮着推测，他不可能已经上床睡觉了，应填cant have gone 。,(三)neednt have done表示本不必做而做了,-She quarreled with the waiter about the bill. -How silly! She _not have done so. She _have talked to the manager. A.need B.would C.should D.could,A,C,9、熟悉情态动词委婉用法： could, would, might等情态动词均有委婉用法，它们不是过去式而是表示语气委婉、客气、礼貌，常用与疑问句，并多用于习惯表达， 如would you please, would you mind, would you like to等，might还可以用于肯定句表示推测，表示可能性小， might和could表示征求对方意见时，回答必须还成may, can.,例1：-Could I borrow your dictionary? Yes, of course you_. A. might B. could C. can D. should,析：选C。该句用can的委婉表达式could 来征求对方意见，could 和might通用，但回答时必须还成can或may，因此该题不选A.,例2：_you mind my smoking here? A. Should B Could C. Might D. Would,析：选D。征求对方意见我是否在这儿吸烟，语气理应委婉，所以应选委婉的表达方式would you mind来征求对方意见。,选择合适的词或词组填空： 1. I have a headache. I _ take an aspirin. (had better; would better) 2. He looks sleepy. He must _ bed very late last night. (go; have gone) 3. I want to go to the office, but you _ with me. (need not to go; need not go) 4. I ought _ those books to the library last week. (to have taken; to take) 5. The mother is telling her son, “You _ eat with your fingers!” (wouldnt; mustnt) 6. He was a good swimmer so he _ swim to the river bank when the boat sank. (was able to; could) 7. To travel from England to Scotland you _ a passport. (dont need; neednt) 8. He went on foot, but he _ by bus. (ought have gone; should have gone),Dear John, Thank you for your letter. I dont think I _ give you any advice. I dont think the manager _ trust you. It sounds as if he has decided that you _ be the thief. Do you have to continue working at this company? Maybe you _ find another job where the people are more friendly. I think that you _ enjoy that mor