中考英语二轮复习课件 语法情态动词.pptx

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1、 情态动词 By Qin Chunhuacan/could能，会，可以，could是can的过去式。cant/couldnt不会，不能，不可能Can you speak French?你会说法语吗？注意：说某种语言，用speakHe said he could be back on time.准时回来他说 他能按时回来be able to do sth 能够做某事can的固定用法：cant help doing sth 情不自禁做某事cant help but do sth只好做某事cant wait to do sth迫不及待地做某事as.as one can=as possible尽可能S

2、he cant be so weak.Can you come over to help me with my lessons?她 不可能 如此 虚弱。过来help sb with sth帮助某人做某事你 能 过来 帮助我 做功课吗？-Could Jim take good care of his sister when his parents went out?-Yes,he could.-No,he couldnt.-吉姆的父母外出的时候，他能照顾好他的姐姐吗？-是的，他能照顾好。-不，他不能照顾好。may/might 可以，可能，may还可表示祝愿。might是may的过去式。may引起

3、的疑问句 肯定回答 用：Yes,you may.是的，你可以。Yes,please.是的，请吧。certainly.当然可以。否定回答用：No,you mustnt.不，你不可以。No,please dont.不，请不要这样做。-May I smoke here?-Yes,you may.-No,you mustnt.You may look up the dictionary if necessary.-我可以在这儿抽烟吗？-是的，你可以。-不，你不可以。你可以查阅字典如果有必要must 必须，一定must引起的疑问句：肯定回答用must,否定回答用neednt 或dont have to.

4、must 与 have to 的区别：两者都表示 必须，但must侧重说话者的主观看法，认为有必要或有义务去做某事；have to侧重于客观需要，含有不得不或被迫之意。We must hand in our homework at once.立即我们必须上交我们的作业If you want to catch the flight to be leaving at 7 oclock in the morning,you have to set off at five.赶上航班早上7点离开的航班出发不得不must 用于肯定句中，表示较有把握的推测，意为“一定”。She must be ill.Yo

5、ud better take her to the hospital.一定是你最好注意：must be 一定是 cant be不可能是had better do sth 最好做某事had better not do sth最好不要做某事need need 引起的疑问句，肯定回答用引起的疑问句，肯定回答用must,must,否定回答用否定回答用neednt.neednt.-Need I hand in my homework now?-Yes,you must.-No,you neednt.-我需要 现在交作业吗？-是的，你需要。-不，你不必要。注:need 需要，作实义动词时，常用于need

6、to do sth需要做某事used to do sth used to do sth 过去常常做某事过去常常做某事be/become/get used to doing sthbe/become/get used to doing sth习惯于做某事习惯于做某事Joan used to_in the city,but now she is used to_in the countryside.A.to live;live B.living;living C.lived;living D.live;livingD琼过去常常居住在城市，但是现在她习惯于住在农村。will/would will/w

7、ould 愿意，将，会，能，表示意愿愿意，将，会，能，表示意愿 请求请求 习惯或特性。习惯或特性。wouldwould是是willwill的过去式。的过去式。Would you please turn off the tap?能请你关掉水龙头吗？He would take part in the game,anyhow.他将参加这个比赛不管怎样ought to do sth ought to do sth 应该做某事应该做某事 ought not to do sth ought not to do sth不应该做某事不应该做某事If everything goes smoothly,we ou

8、ght to finish doing the task ahead of time.如果一切顺利我们应该做完这项任务提前顺利地注意：finish doing sth 完成做某事shall在疑问句中表示征求对方意见，主要用于第一第三人称，意为“.好吗？”。用在陈述句中，意思是 应该 必须。Shall we go swimming?我们去游泳好吗？should 应该Tom must have completed his work,or he wouldnt be enjoying himself on the playground.must have done must have done 表示

9、对过去事态的推测，表示对过去事态的推测，只用于肯定句中，意思是：一定做了某事。其只用于肯定句中，意思是：一定做了某事。其否定形式是：否定形式是：cant/couldnt have donecant/couldnt have done不不可能做了某事可能做了某事P课本317汤姆一定完成了他的工作，否则他现在不会在操场上玩得这么开心。enjoy oneself=have fun=have a good time玩得开心，过得愉快on the playground在操场上complete 完成He couldnt have worked out the problem.He cant have re

10、ad the book because he knows nothing about it.想出，算出，解决他不可能解决了这个问题。他不可能读过这本书因为他对这本书一无所知。should have done本应该做某事而实际上没有做shouldnt have done本不应该做某事而实际上做了may/might have done 可能做了某事may/might not have done可能没有做某事could have done 本可以做某事却没有做You could have done better but you didnt try your best.你本可以做得更好但是你没有尽最大

11、努力neednt have done本不必要做某事而实际上却做了 Without the help of my English teacher,I _ the first prize in the English spoken competition.A.couldnt have won B.mustnt have wonC.shouldt have won D.might have woncouldnt have done 不可能做了某事shouldnt have done本不应该做某事might have done可能做了某事没有一等奖英语口语比赛AWhen he was at school,he_early before breakfast.A.shall get up B.should get upC.will get up D.would get upshall/should 应该 will/would 将，会，能，愿意D当他在学校的时候，他在吃早餐前_早起。根据意思，选择 会 早起，不是应该早起，was 说明在学校是过去，那么会早起也是过去，will的过去式是would.