高中英语Unit 2 Sporting eventsgrammar and usage (2)课件牛津版必修四.ppt

unit2grammarandusage modalverbs1 ability 1 hecanrunthe100msprintin11seconds 2 canthegirlreadbeforeshegoestoschool oughtto should 1 表示义务 应该 用于各种人称youshouldbepolitetoyourteacher youshouldn tspendsomuchtimeplayingcomputergames 2 表示推测 想必 估计 的意思 iftheystarttoday theyshouldarrivethereintwodays 3 表示与想象的不一样 照说应该 iwonderwheremaryis sheshouldbeherenow 4 在某些从句中 表示虚拟语气 hesuggestedthati should gotoshanghaitomorrow hedemandedthatwe should solvetheproblematonce 5 表示惊讶 忧虑 惋惜等感情色彩 iamsurprisedheshouldeatsolittleeveryday haveto must haveto表示客观需求must表示主观愿望everyonehastogotoschoolattheageof7inthecountry wemustwokhardtomakeourcountrystrongandrich youmustworkhardtowinthegoldmedal certaintymight may could should oughtto will must shemightwinamedalattheolympics shemaybeathomenow shecouldreadandwriteattheageof4 sheshouldcometojoinus sheoughtto will musthelpmewheneveriamintrouble permissioncan could may might a caniwatchtheolympics b yes youcan no youcan t a mayihavealookatyouphoto b yes youmay no youmustn t no you dbetternot could比can更委婉 might比may更委婉 makerequests will can could woulda can will could wouldyouhelpmewithmytraining b yes ican will can will makesuggestions shallwe i he she theydosomeexercisethismorning shall常用于第一 三人称 表示征求对方意见a shallhecomein b ok makeoffers i llwashyoursportsjacket shalligetaticketforyou shallwecarrythebooksforyou shallicleantheblackboardforyou giveadvice youshouldnot oughtnottoeatalotbeforeswimming thestudentsshouldspendalltheirtimeworkingattheirlessons weshouldnotlaughatthosewhoareintrouble 和其他时态的连用 theboysmaybeplayingfootballontheplayground theboysmayhavefinishedtheirhomeworkbythetimeschoolisover heplaysbasketballverywell hemusthavepracticeditalot ourheadmastermusthavebeentousa forheknowsthecountrysomuch musthavedone的反意疑问句 youmusthaveseenthefilm haven tyou youmusthaveseenthefilmlastweek didn tyou hisparentsmusthavebeatenhim haven tthey hisparentsmusthavebeatenhimyesterday didn tthey can beableto can的形式只有can could两种beableto的形式有am is areableto was wereableto have hasbeenableto等多种can一般能力beableto经过努力后而达到的一定境界mybrothercanplaytabletennis mybrotherisabletodiveunderwaterfor10minutes shallwill shall表达诺言 will表示决心或决定don tworry youshallhavetheticketsforthegames liumeiwillgoandbuytheticketsforthegames shall 一 三人称 will 二 三人称 1 shallwegoswimmingthisweekend 2 agroupofstudentsarewaitingtoseeyououtside shalltheycomein 3 willyougohikingwithmeinthemountains 4 willhepayforme mustn tneedn t mustn t 不准 不许 语气强烈needn t 不需要 没必要 语气缓和youmustn tmissthisfootballmatch it sveryimportant youneedn twatchthegameifyoudon twantto mustwecleantheclassroom yes youmust no youneedn t needdare 作为情态动词时 两个词常用于疑问句和否定句 用作实义动词时 可用于各种句式 情态动词时 needihelpyou yes please youneedn ttelephonehimnow howdareyoutalktotheteacherlikethat thegirldarenotgooutaloneatnight 用作实义动词时 weneedtotellhimthenews youdon