Unit2Letscelebrate!Usinglanguage情态动词课件-高一英语.pptx

Grammar---ModalsGrammar---ModalsGrammar---Modals(Ⅱ)

①Asparents,theytrytokeepthatmagicalivefortheirchildrenforaslongastheycan.②Whocoulditbefrom?③Theletterswerealsobeautifullyillustrated—eachmusthavetakenitstrueauthor,Tolkien,alongtimetocomplete.④Inanotherletter,FatherChristmascomplainedabouthowhecouldnotstophishelpersplayinggameswiththetoysinsteadofwrappingthemup.

⑤Interestingly,thelettersdidnotcontaintheusualwarningstochildrenthattheymightnotreceivetheirpresentsiftheywerenotgood.⑥Byexpressingloveforhischildreninsuchaspecialway,TolkienmayindeedhavebeentherealFatherChristmas.以上句子中都包含一个情态动词。

Modals情态动词+do(动词原形)→表示对现在的推测情态动词+havedone(完成式)→表示对过去的推测Possibility:mustcouldmight1.他一定在办公室里，因为里面的灯亮着。2.昨晚一定下雨了，因为地面是湿的。3.他担心他们可能不喜欢这个想法。4.她今天可能是坐火车回来的。Hemustbe/stayinhisoffice,becausethelightsinitareon.Itmusthaverainedlastnight,becausethegroundiswet.Heisafraidtheymightnotliketheidea.Shemight/couldhavecomebytrain.

can/could基本用法:1.表示能力eg:Icaneasilytellmyfather’sstep.2.表示客观上的可能性eg:Accidentscanhappentoanydrunkendriver.eg:Asahumanbeing,anyonecanmakeamistake.

3.表示推测eg:Thatcan’tbeMary—she’sinNewYork.eg:Surelyyoucan’tbehungry.Youhaveonlyjusthadlunch.4.表示请求和许可eg:CanIgonow?eg:CouldIcometoseeyoutomorrow?

may/might1.表示征求同意或许可eg:May/MightIplaythecomputergamesaftersupper?2.表示推测(语气较弱,might比may更具有不确定性)Johnisabsent.Hemay/mightbeill.TheymighthavealotofworktodonowbutI’mnotsure.

3.用于祈使句中表示祝愿（May+主语+动词原形+其他）Mayyouhaveagoodtime!（祝你玩得开心！）Mayyousucceed!（祝你成功！）MayGodblessyou!（愿上帝保佑你！）Mayyourdreamscometrue!（愿你的梦想成真！）Mayyoualwaysbehealthyandhappy!（愿你永远健康快乐！）Mayyoureturnsoon.（愿你早日归来！）

must1.表示肯定的推测Youmustbeverytiredafteryourlongjourney.2.表示“必须”Youmustn’tdothat,becauseyoumustkeepyourword.3.表示“偏偏;偏要”ThecarmustbreakdownjustwhenI