,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2019-8-17,感谢你的观看,*,单击此处编辑母版标题样式,单击此处编辑母版文本样式,第二级,第三级,第四级,第五级,2019-8-17,感谢你的观看,*,情态动词,1,感谢你的观看,2019-8-17,情态动词1感谢你的观看2019-,1,、掌握情态动词的基本用法。,2,、复习常用词汇及句型（之四）,【,学习目标,】,2,感谢你的观看,2019-8-17,【学习目标】2感谢你的观看2019-8-17,考点主要为：,情态动词的基本用法,;,“,情态动词,+have done”,结构,;,情态动词表示特定语气,【,考点解读,】,情态动词,3,感谢你的观看,2019-8-17,考点主要为：【考点解读】情态动词,几组常见情态动词的比较,1,、,cant,和,may not,cant“,不可能”,may not“,可能不,或许不”,前者语气更强,.,2,、,must,和,have to,must,表示说话人的主观看法,;,而,have to,表示客观的需要,;,mustnt“,决不能”,而,dont have to(neednt)“,不必”。,4,感谢你的观看,2019-8-17,几组常见情态动词的比较4感谢你的观看2019-8-17,3,、,would,和,used to,would,指反复发生的动作或某种倾向，后面要接表示动作的,动词，不能接表示认识或状态的词。,used to,表示过去的习惯动作或状态，强调现在已不存在。,eg.When we were children we,would,(used to),go swimming every summer in that river.,There,used to be,a hospital here.(,只能用,used to),5,感谢你的观看,2019-8-17,3、would 和 used to 5感谢你的观看2019-,4,、,could,和,was were able to,could,仅表示过去具备某种能力，而,was were able to,表示不仅具备且实施了某种了能力，相当于,succeeded in doing sth managed to do sth.,，区别仅限于肯定句。,“情态动词,+have done”,的用法,1,、“,must+have+,过去分词”,表示对过去的一种肯定的推测，意为“肯定、一定”，多用于肯定句。,6,感谢你的观看,2019-8-17,4、could 和 was were able to6感,eg.I must have left my glasses in the library.,2,、“,maymight+have+,过去分词”,用于肯定句和否定句，表示对已经发生的事情的推测，相当于,“可能、大概”，但不太肯定。,might,比,may,语气更弱。,eg.He might have gone to the gas station,but I am not sure.,7,感谢你的观看,2019-8-17,eg.I must have left my glasse,3,、,should ought to+have+,过去分词,该结构一般用于虚拟语气，肯定句表示过去没有发生但却应该,发生的事，译为“本应”；否定句表示过去发生了本不该发生的,事，译为“本不该”。,eg.You should have come to the lab if you were really serious about your research.,8,感谢你的观看,2019-8-17,3、should ought to+have+过去分词,-Why didnt you make me a telephone call yesterday?,-I ought to have been told about it.,4,、“,can not+have+,过去分词”,表示对过去不可能发生的事进行推测。,eg.This article about travelling in China cant have been written by him because he has never been here at all.,9,感谢你的观看,2019-8-17,-Why didnt you make me a tel,5,、“,could not+have+,过去分词,”,表示过去的时间，说明某事不可能已经发生。,eg.He couldnt have seen Ann yesterday.Shes,gone abroad.,6,、“,neednt+have+,过去分词”,表示不必做的事情却做了,可译为“其实不必”。,eg.Look,you neednt have bought those sweaters for me,I have just knitted one.,10,感谢你的观看,2019-8-17,5、“could not+have+过去分词”10感谢你,“情态动词,+have+done”,总结,must have done sth.,过去一定做了某事,cant couldnt have done,过去不可能做了某事,may might have done,过去可能做了某事,neednt have done,过去本来没有必要做而做了某事,11,感谢你的观看,2019-8-17,“情态动词+have+done”总结11感谢你的观看20,5.could have done,过去本来可以,-,某事可能已经发生,-,6.should ought to have done,过去本来应该做某事而没有做,7.shouldnt oughtnt to have done,过去本来不应该做某事而做了,12,感谢你的观看,2019-8-17,5.could have done 过去本来可以-,第二、三人称,+shall,的用法（特定语气）,表示意图、允诺、警告、威胁、规定、命令，表示说话者的,决心或决定。（必须、必将）,eg.He shall suffer for this.(,他必将自食其果。,),You shall do it immediately.,（你要,）,Shall my son carry those bags for you?,（我）让我的儿子帮你拿那些提包好吗？,What shall Jane do?,让,Jane,干什么？,(,提议让第三者做某事，并征求对方意见,),13,感谢你的观看,2019-8-17,第二、三人称+shall 的用法（特定语气）13感谢,Will,的几种用法,1,、指现在或到现在为止的事情，不指将来，多用于概括性陈述。,e.g.He will often sit up all night.,他经常彻夜不眠。,The hall will hold a hundred people.,这大厅能容纳,100,人。,Accidents will happen.,事故总会发生。,14,感谢你的观看,2019-8-17,Will 的几种用法14感谢你的观看2019-8-17,2,、表示主语“执意要干某事”。,e.g.The door will not open.,门打不开。,He will not consent.,他就是不答应。,need&dare,1,、,need,既用作情态助动词，也可以用作普通及物动词。,need,作为情态助动词通常只用于否定句和疑问句。,need,情态助动词表示现在或将来的必须性及义务。,e.g.Ive bought a car,so I need never go,to the office by bus.,15,感谢你的观看,2019-8-17,2、表示主语“执意要干某事”。15感谢你的观看2019-8-,Need I go right now?,This house needs painting.,He didnt need to be told twice.,2,、,dare,作为情态动词意为“敢于干”，表示勇气；用于指,现在或将来的行为，多用于否定句和疑问句。,dare,用作普通及物动词，疑问式和否定式用,do(es),或,did,构成。,16,感谢你的观看,2019-8-17,Need I go right now?16感谢你的观看2,eg.He dare not darent ask her about the,matter.,Dare he go?,Does he dare(to)go?,should&ought to,should,多表示主观的看法，,ought to,多反映客观的情况。,eg.Children should be taught to speak the,truth.,（要教孩子们说真话）,17,感谢你的观看,2019-8-17,eg.He dare not darent ask,You ought not to visit such a place after dark.,（天黑后，你不该去那种地方）,would like,结构,would like to do,表示现在或将来的愿望,would like to have done,表示过去没有实现的愿望,would have liked to do,表示过去没有实现的愿望,18,感谢你的观看,2019-8-17,You ought not to visit such a,e.g.,Id very much like to be a guitarist.,（吉他手）,Id like to have seen her face when she,opened the letter.,（我真想看看她打开这封信时的脸色）,情态动词练习,用,(must,cantcan,might,have to,should,ought not to,),的适当形式填空：,1.You _ play cards in class.,2.Youve been travelling for several weeks.You,_ be very tired.,3.They go to expensive shops and restaurants,very often.So they _ be short of,money.,4.“Why are those people waiting in the street?”“I dont know.They _ be waiting for a bus.”,oughtnt to,must,cant,might,19,感谢你的观看,2019-8-17,e.g.Id very much like to be,用,(must,cant,might,have to,should,ought not to,),的适当形式填空：,5.My English Chinese dictionary has,disappeared.Who _ have taken it?,6.We dont see you enough.You _,come and see us more often.,7.Im sorry I couldnt come yesterday.I,_ work late.,8.You missed a great party last night.,You _ come.,9.I _ pay Tracy a visit,but Im not,sure whether I will have time this Sunday.,10.Children under 12 years of age in that,country _ be under supervision,when in a public libr