情态动词shall_should__must_用法及练习

,Modalverbs,1.shall用于疑问句与第一、三人称连用，表示征求意见或请求许可。1)Shallwegooutforamealtogether?2)Shallthenewcomerhaveatry?,1.-Theroomissodirty._wecleanit?-Ok.AwillBShallCWouldDDo,(2)用于肯定句与二、三人称连用，表示说话人的允诺，决心，威胁，警告，命令，或法律、文件的规定。Nothingshallstopmefromgoingthere.Youshallbesorryforwhatyouhavedone,Itellyou.,决心,威胁/警告,3.Youshallgetanmp5asyourbirthdaypresentthisyear.4.Thefineshallbepaidincash.5.Personsunder18shallnotbeemployed.,（允诺）,（规定）,（规定）,“Theinterest(利息)_bedividedintofiveparts,accordingtotheagreement,”declaredthejudge.mayB.shouldC.mustD.shall,2.should表示惊讶、遗憾、“竟然，居然”Itsstrangethatheshouldfailagain.Youcantimaginethatawell-behavedgentleman_besorudetoalady.A.mightB.needC.shouldD.would,3.must-MustIdoitatonce?-Yes,you_./-No,you_.(=No,you_,must,neednt,donthaveto),Youmustntwasteanymoretime.Youmustnotsmokehere.禁止,不可以,千万别,2)肯定推测，“一定，准是”（只能用于肯定句）1.Shemustbetiredaftersuchalongwalk.2.Hemustbesleepingnow.,-Hi,Tom.AnyideawhereJaneis?-She_intheclassroom.Isawhertherejustnow.AshallbeBshouldhavebeenCmustbeDmighthavebeen,3.must表示固执,不满,意为“偏偏，偏要,非得”-MayIsmokehere?-Ifyou_,chooseaseatinthesmokingsection.A.shouldB.couldC.mayD.must,John,lookatthetime,_youplaythepianoatsuchalatehour?A.MustB.CanC.MayD.Need,Would的用法,1.would是will的过去式,但它也是一个情态动词.(would+动词原形）（1）wouldyou表示委婉，客气的说法a)Wouldyouliketohaveacupoftea?b)Wouldyoumindmysmokinghere?c)Wouldyoutellmethewaytothepark?,（2）.表示愿意，宁愿，肯,HewouldeatnothingItoldhimnottogo,buthewouldnotlistenHewoulddoinspiteofourwarnings.,（3）