情态动词课件仁爱版八年级英语上册

情态动词的用法语法1can/could/beableto

能够，可能2may/might

可能3must/haveto

必须，不得不4shall/should

应该5will/would

预见将来；意愿6need/dare

需要7oughtto

应该情态动词1.概念：①本身带有意思②不独立作谓语2.考点：①情态动词无人称和数的变化②情态动词+do谓语——辅助动词1can/could/beableto

能够；可能*beableto

能用于各种时态。

can/could

只能表示现在或过去的能力。*was/wereableto:“设法做成某事”

相当于managedtodosth.succeededindoingsth.。1.can与beableto有何区别？A

2.Theywill______runthismachineontheirowninthreemonths.A.canB.couldC.mayD.beabletoD2may/might

可能may/mightaswell

还是-----好wemayaswellstaywhereweare4.—CouldIborrowyourdictionary?—Yes,ofcourseyou_______.A.mightB.willC.canD.should5.—MightIwatchTVaftersupper?—Yes,you________.A.mayB.mustC.mightD.canCA3must与haveto的用法3Itmustbeourheadteacher.Youmustbehungryafteralongwalk.（推测)4Ireallymustgonow.Ihavetogonow,becausemymotherisinhospital.(不得不）6.You______returnthebooknow.Youcankeepittillnextweekifyoulike.A.can’tB.mustn’tC.needn’tD.maynot7.Johnny,you______playwiththeknife,you______hurtyourself.A.won’t;can’tB.mustn’t;mayC.shouldn’t;mustD.can’t;shouldn’tCBBC4shall1用于一，三人称疑问句表示征求对方的意见和向对方请示Shallthedriverwait?Whatshallwedonext?2用于二三人称陈述句表示命令警告，允诺，威胁以及法律条文规定Youshallgowithme/HeshallbepunishedYoushallhavethebookwhenIfinishitAllthechildrenshallgotoschoolattheageofseven.1表示劝告和建议Youshouldstudyhard.2表推测Theyshouldhavearrivedbytwoo'clock3表竟然Idon'tknowwhyyoushouldbesorudetoyourmother5should应该CB

5will与would的用法1表示意志和意愿Iwillneverdoitagain.Theysaidthattheywouldhelpus.2表请求，建议Willyoupleasetakeamessageforme?Wouldyoupleasepasshimthebook?3表功能Thismachinewon'twork.6need

需要与dare

敢的用法既可做实意动词又可做情态动词。做情态动词用于否定和疑问句而做实意动词可用于肯定，否定疑问Howdareyousaysuchathing?Hedarednotdoit.Hedidn’tdare(to)doit.Heneedn’tgetupsoearly.Hedoesn’tneedtogetupsoearly.13.She_____outaloneatnight.()A.darenottogoB.daresnotgoC.doesn’tdaretogoD.doesn’tdaresgoC7oughtto的用法1表应该Yououghttotakecareofhim.Youarehisfather.Yououghttogethimtoreceivegoodeducation2表推测Heoughttobehomebynow.Hemustbehomebynow.8.Oughtto与should的区别：oughtto和should表示应该、应当、可能