情态动词表推测课件

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,*,ppt课件,*,He be Curnane!,He be thinking.,He be a common boy.,情态动词表推测,must,might,cant,1,ppt课件,He be Curnane!He,表推测的三种句式,The light is on,so somebody _ be at home.,must,The light is on,so my sister _ be at home.,may,/,might,1.,在肯定句中一般用,must,may/might,，,语气,逐渐减弱。,2,ppt课件,表推测的三种句式The light is on,so so,常用于表推测的情态动词,will,would,ought to,should,（一定）,（可能）,（很有可能）,（很有可能）,（应该，很有可能）,（应该，很有可能）,（可能）,（可能）,（可能）,肯定,推,测,最 强,最 弱,must,might,can,could,may,3,ppt课件,常用于表推测的情态动词（一定）（可能）（很有可能）（很有可能,Its sunny.It _ rain.,cant,表推测的三种句式,2.,在否定句中用,cant/couldnt(,不可能,),，,may not/might not(,可能不,),。,He _ know how to answer this question.,/,might not,may not,4,ppt课件,Its sunny.It _ rain.c,常用于表推测的情态动词,（,禁止,不许,）,（可能）,（,肯定不,不可能,）,（,肯定不,不,可能）,（可能,不,）,否,定,推,测,最 强,最 弱,must not,might not,cant,couldnt,may not,（,不用于推测,）,5,ppt课件,常用于表推测的情态动词（禁止,不许）（可能）（肯定不,不可,表推测的三种句式,3.,在疑问句中，一般只使用,can/could,。,she have finished her homework,?,your sister be at home now,?,Could,Can,【,口诀,】,can,不肯，,may/could/might,不问，,must,不否问,注：,can,表示推测时，不用于肯定句；,may/might/could,表示推测时，不用于疑问句；,must,表示推测时，不用于否定句或疑问句。,6,ppt课件,表推测的三种句式 3.在疑问句中，一般只使用can/co,情态动词表推测的三种时态,He _ to music.,对现在或一般情况的推测,“,情态动词,+,be,”,“,情态动词,+,be doing,”,“,情态动词,+,动词原形,”,must be listing,He _ at home now.The light isnt on.,cant be,He _ in his office.,may work,7,ppt课件,情态动词表推测的三种时态He _ to,情态动词表推测的三种时态,She _ very happy when she opens the door.,对将来推测，,“情态动词,+,动词原形”,must be,8,ppt课件,情态动词表推测的三种时态She _ very,情态动词表推测的三种时态,The ground is wet.It _ yesterday night.,对过去或已经完成的推测，“情态动词,+have+,过去分词”,may have rained,9,ppt课件,情态动词表推测的三种时态The ground is wet.,表对已经发生的事情的推测，意为“一定，想必”，在句子中表示的是一种肯定的推测。这种结构一般只用于肯定句,。,对过去推测的几组用法,1.must have done,否定形式：,cant(couldnt)have done,They out,because the light,is,still on.,He,didnt hear,the phone.He asleep.,“不可能，肯定不会”,must have been,cant have gone,10,ppt课件,表对已经发生的事情的推测，意为“一定，想必”，在句子中表示的,表对过去的时间里可能发生的事情的推测，一般只用于否定句和疑问句。,对过去推测的几组用法,2.can/could have done,He,cant have finished,the work so soon.,用于肯定句中，常用来表示本来可以完成而实际未完成的动作。,We,could have walked,to the station,it was so near.,“本来能做,.(,而实际上没做,),”,11,ppt课件,表对过去的时间里可能发生的事情的推测，一般只用于否定句和疑问,1),表对已经发生的事情不太肯定的推测，意为“可能已经，或许已经”,对过去推测的几组用法,3.may/might have done,2),虚拟用法,：,表可以做，但却没有做。,If we had taken the other road,we,might have arrived,earlier.,He,might have given,you more help,but he was very busy.,12,ppt课件,1)表对已经发生的事情不太肯定的推测，意为“可能已经，或许已,推,测,三,种句式,否,定,肯定,疑问,常用于表推测的情态动词,否,定,肯定,情态动词,表,推测的三种时态,将来,现在,/,一般,过去,/,完成,几组,对过去,的,推测,can/could have done,must have done,may/might have done,13,ppt课件,推三种句式否定肯定疑问常用于表推测的情态动词否定肯定情态动词,Exercise:,1.Whose earrings are these?They _,be Marys.She wears earrings sometimes.,2.Carls,_,come to the party tonight,but Im not sure.,3.The telephone is ringing,but nobody answer it,he,_,be at home.,4.-Is this Lan Qiangs boxing glove?,-Yes,it,_,be his.This is his name on the back.,5.Youd better take an umbrella.It _,rain this afternoon.,may/could/might,must,may/might/could,cant,may/might/could,14,ppt课件,Exercise:may/could/might m,6.Its the library!So you _ know shouting is not allowed here.,7.-Have you decided where to spend your summer holiday?,-Not yet.We _ go to Qingdao.,8.-Is Jessica giving us a speech this evening?,-No,it _ be her.She has gone to Japan.,9.-What will the weather be like tomorrow?,-It _ be rainy,cloudy,or sunny.Who know?,10.You _ be tired after playing sports for a long time without a rest.,must,may,cant,might,must,15,ppt课件,6.Its the library!So you _,