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Haveto与must区别区别1:must多表示主观需要或责任感的驱使有必要或有义务去做某事,多译为“必须”,haveto多表示客观存在的环境所限,即客观要求(无奈)而为之,多译为“不得不干某事”。Imustcleantheroombecausetherearetoodirty.(无人强迫)因为太脏了,我必须要打扫房间。Wemustbethereontime.(责任感的驱使)我们一定准时到达。Ihavetodomyhomeworknow.(不得不做)我现在不得不做作业。Ihavetoleaveschoolbecausemyfamilyispoornow.(无奈)因为家里穷了,我不得不退学。Ihavetostopsmoking.(外界压力,客观情况使然)Imuststopsmoking.(主观认为)区别2:must没有时态的变化,hemust或shemusthaveto有时态的变化。haveto/hasto/hadto/willhavetoDamingwashurt.Thedoctorsaidhehadtostayinhospitalforabouttwoweeks.Hisfatherhastogototakecareofhim.大明受伤了。医生说他大概得住院两周,他的父亲得去照顾他。Wedon’thavetogotoschoolonSundays.星期天我们不必上学。区别3:◎must的否定:借助助动词do或does,即don’t或doesn’t而不是mustn’t,表示“禁止,命令”,与“必须,一定”没有任何关系。例:No!Youmustn’tturnleft!YoumustturnrightintoTheStrand.不!你不能向左转!你应该向右转进入到strand中。must引起的疑问句,肯定回答要用---must.否定回答要用---neednt或don’t(doesn’t)haveto,意思是“不必”.1)—MustIfinishmyhomeworkbeforeeighto’clock?—Yes,youmust.我必须要在8点之前完成作业吗?是的,必须。2)—MustIattendthemeeting?—No,youneednt/donthaveto.YoucanaskTomtogoinstead.我必须要参加这次会议吗?不。你不必。你可以让汤姆替你去。◎have(has)to否定的疑问,否定均须借助于do/does。Hedoesn’thavetofinishhishomework.Doeshehavetogotherenow?Yes,hedoes/No,hedoesn’t注意:Doeshehavetogotherenow?不说Hashetogotherenow?专练:用have/hasto和must填空1.It’srainingnow,he____stayathome.2.MustIfinishmyhomework?No,______.A.Youmustn’tB.youmustC.youneedn’tD.youdon’t3.Hehastogohome(改为否定句)___________________________________.(改为一般疑问句)____________________________________?Yes,_______./No,________.4.Wemustgothereateight.(改为否定句)___________________________________.(改为一般疑问句)____________________________________?Yes,_______./No,________.
本文标题:have-to与must区别
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