外研版英语九年级下4.3 Module 4 Unit 3 Language in use modal verbs

外研版《英语》九年级下册Module4RulesandsuggestionsUnit3Languageinuse课程编号：TS1611010203W92040301WL同步教材视频课程→www.moocun.com授课:SherryLanguageGoalscan(原形)e.g.WangGangcansingEnglishsongs.表能力、可能性、允许等，相当于beableto；e.g.Thegirlcan'tbeLucy.ShehasgonetoLondon.用于否定句或疑问句中表推测。e.g.CouldIuseyourcar?用于疑问句表请求。情态动词could(过去式)may(原形)might(过去式)e.g.Billisn'tatschool.Hemaybeathomenow.在陈述句中可以表示许可、较小的可能e.g.MayIgonow?在疑问句中可以表示征求意见e.g.Hetoldmehemightbelate.表示有礼貌的请求、可能等。情态动词should应该e.g.Youshouldexercisethreetimesaweektokeepfit.表示义务、推测等。情态动词must必须e.g.It'stoolate.Imustgohomenow.表命令或，强调说话人的主观意愿；e.g.Lanaishappyandshemustknowtheexcitingnews.表示肯定的猜测，一般只用于肯定句中，否定句中用can't；e.g.Youmustn'ttalklikethat.其否定形式为mustn't，意为“禁止；不许”。含有must的问句，其否定答语用needn't或don'thaveto；情态动词易混词用法例句can表示能力时，can可以和beableto互换。can只用于现在时；过去时用could。Hecouldplaythepianoattheageoffour.=Hewasabletoplaythepianoattheageoffour.beableto可用于各种时态。另外，beableto常指经过努力，花费了时间和劳动之后才能做到某事。Willyoubeabletofinishthetaskintwodays?易混情态动词辨析易混词用法例句must必须，应该。强调个人意志或主观上的需要。Wemustdothethingsatonce.haveto必须，不得不。强调客观上的必要性。I'mtiredandIhavetostopandhavearest.易混情态动词辨析易混词用法例句maybe大概，也许。副词，相当于perhaps，用于句首。可与maybe互换。MaybetheboyisfromCanada.=TheboymaybefromCanada.maybe可能是，在句中作谓语。may为情态动词，be为动词原形，用在句中。易混情态动词辨析1．Nosmoking.　　　□2．Noeatingordrinking.□3．Childrencrossing.□4．Danger!Becarefuloffallingrocks.□5．Childrenshouldbetakencareofbyparents.□6．Donotdrinkanddrive.□Matchthesignswiththerulesandwarnings.cbdefa小结