情态动词必考考点ppt新教材课件

Could/Canithavehappenedlastnight?Itcouldn’t/can’thavehappenedlastnightHemustbereading，表征求对方意见或向对方请求，警告，Youshallbepunishedifyouinsistondoingitthisway5，hasn’the?Itmusthaverainedlastnight，didn’tit?3，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，否定和疑问分别用can’t/couldn’t和can/could，译成“一定”，三人称，IshallgotoworkafterIhavefinishedschool2）用于一，might)+完成时，Youmusthavemethimbeforemust—may—might可能性依次减弱must只能用于肯定句，情态动词的用法1，承诺，三人称疑问句，CouldIborrowyourbook?YesOfcourseyoucan2Wouldyouliketodoitforme?YesIwould一，must只能用于肯定，否定和疑问分别用can’t和can，Shallhecomein?—Comein，please3）用于二，推测语气(2)对过去情况推测：must(may，表示保证，情态动词注意事项(1)对现在或将来情况推测：must+动词原形，beabletomustcanhaveto1）用于第一人称表将来，威胁，isn’the?Youmustdoityourself，HemusttellalieCanhetellalie?Hecan’ttellalie*Must-should/oughtto–may-might/could+do可能性依次减弱2，don’tyou?Hemusthavegoneoverthearticle，Shall1）预，