must 用法

1.must表猜测(肯定句中)1)Itmustbeourheadmaster.2)Hemustbeeatingsomething./Itmustberainingnow.3)Itmusthaverainedlastnight.do（现在）mustbedoing（正在进行）havedone（过去）否定句中用can’t:2)Hecan’tbeeatingsomething.3)Itcan’thaverainedlastnight.疑问句中用can:2)Canhebeeatingsomething?3)Canithaverainedlastnight?不肯定猜测用may或might:2)Hemay/mightbeeatingsomething.3)Itmay/mighthaverainedlastnight.1)Itcan’tbeourheadmaster.1)Canitbeourheadmaster?1)Itmay/mightbeourheadmaster.must表猜测肯定猜测：Itmustbeourheadmaster.Itmustberainingnow.Itmusthaverainedlastnight.maymight否定猜测：Itcan’thaverainedlastnight.maynotmightnot疑问猜测：Canithaverainedlastnight?Could点击一下反义疑问句:Itmustbeourheadmaster,_________?Hemusthaveagoodbook,_________?Hemustbeeatingnow,___________?Hemusthavefinishedhishomeworkbynow,__________?Hemusthavefinishedhishomeworkbythen,__________?Itmusthaverainedlastnight,_________?isn’titdoesn’theisn’thehasn’thehadn’thedidn’tit2.must表“必须，一定；非得，偏偏”---Musthecomehereontime?---Yes,__________No,___________/__________________Youmustn’tleavebeforenine.Onetyremustgowrongatthatmoment.hemust.heneedn’t./No,hedon’thaveto.译：1.我的字典不见了。会是谁拿的呢？Mydictionaryisgone.Whocouldhavetakenit?2.他不可能迷路。我当初给他画了地图的。Hecan’thavebeenlost.Idrewamapforhim.3.Peter___comewithustonight,butheisn'tverysureyet.A.mustB.mayC.canD.willB4.Youbetired－you’veonlybeenworkingforanhour.A.mustnotB.won’tC.can’tD.maynotc5.Mary____myletter,otherwiseshewouldhaverepliedbeforenow.A.shouldhavereceiveB.hasreceivedC.couldn’thavereceivedD.oughttohavereceivedC6．MysistermethimattheGrandTheatreyesterdayafternoonsohe_______yourlecture．A．couldn'thaveattendedB．needn'thaveattendedC．mustn'thaveattendedD．shouldn'thaveattendedA7.Itrainedeverydayduringtheirholiday,sothey________averynicetime.A.wouldn'thavehadB.couldn'tC.can'thavehadD.shouldn'thaveC8.Theroomisinaterriblemess;it___cleaned.A.can’thavebeenB.shouldn’thavebeenC.mustn’thavebeenD.wouldn’thavebeenA9.You_____herinherofficelastFriday;she’sbeenoutoftownfortwoweeks.A.needn’thaveseenB.musthaveseenC.mighthaveseenD.can’thaveseenD10.—Why!Icouldn’tgettoyouonthephonethismorning.—We________tennisintheyardwhenyouphoned.A.mustbeplayingB.couldbeplayingC.musthaveplayedD.musthavebeenplayingD