情态动词课件

三人称疑问句，表征求对方意见或向对方请求，推测语气(2)对过去情况推测：must(may，语气委婉，HemusttellalieCanhetellalie?Hecan’ttellalie*Must-should/oughtto–may-might/could+do可能性依次减弱2，）*---Wouldyouliketodoitforme?---YesIwould一，1，答语应用can，didn’tit?3，might)+完成时，主要用于疑问句，否定和疑问分别用can’t/couldn’t和can/could，I’mafraidnot(could也可表请求，译成“一定”，hasn’the?Itmusthaverainedlastnight，Youmusthavemethimbeforemust—may—might可能性依次减弱must只能用于肯定句，不可用于肯定句，Could/Canithavehappenedlastnight?Itcouldn’t/can’thavehappenedlastnightHemustbereading，isn’the?Youmustdoityourself，IshallgotoworkafterIhavefinishedschool2）用于一，否定和疑问分别用can’t和can，beabletomustcanhaveto1）用于第一人称表将来，情态动词注意事项情态动词的用法(1)对现在或将来情况推测：must+动词原形，表猜测语气的反意疑问句的构成wouldneedusedtododaremustn’tdon’thaveto=needn’tmay/mightdo/havedone不妨…;还是…为好4，must只能用于肯定，*---CouldIborrowyourbook?---YesOfcourseyoucan/No，don’tyou?Hemusthavegoneoverthearticle，Shallhecomein?，