英语必修三 unit1 情态动词(第一讲)

情态动词Modalverbmay/mightWhatawarddidyougetforthesportscompetition?MayIhavealook?Ourfootballteamdidn’tplayverywelltoday,butwemightdobettertomorrow.

Mayyousucceed!表示许可或征询对方许可，常译为“可以”。表示对现在或过去情况的推测，常译为“可能”。祈使句中表祝愿。May+主语+动原It’srainingheavily.We_______aswellstayathome,watchingTV.A.willB.canC.shallD.maymay/mightaswell……还不如，不妨，最好Dcan/couldJimisn’tverygoodatmathsorscience,buthecanspeakEnglishverywell.Itwasthelastdayofschool,buttheteachersaidthatwecouldnotleaveearly.表示能力，译为“能；会”。表示请求或许可，译为“可以”。Thehuntershavebeenlostfordays.Theycouldstarve.Howcouldyousaytoyourfatherlikethat?表示惊讶、怀疑，译为“会；能”。表示对现在或过去情况的推测，译为“可能”。can/could的固定搭配can’thelpdoing禁不住做某事cannot/couldn’t…enough/too…越…越好；无论…也不过分Youcannotbetoocarefultocrosstheroad.=Youcannotbecarefulenoughtocrosstheroad.不得不/只好做某事cannot/couldn’tbutdocannothelpbutdocannotchoosebutdocandonothingbutdohavenochoicebuttodohavenothingtodobutdowill/would表示习惯性动作或某种倾向时，译为“常常；习惯于”。Oilwillfloatonwater.Myunclewaspoorbutlikedfashion,sohewouldoftendressupasarichman.Thedoorwon’topen.Theradiodoesn’twork.shall/shouldYoushallnotleaveyourpost.Sheshouldhavepassedtheexam.Themanshouldbesorudetoalady.shallnot不得，不能shouldhavedone本应该做却未做should表示吃惊

，可译为“居然，竟然”

must/can’tWhymustitrainonSunday?表示“偏要；硬要；非得”，指令人不快的事情。AmanlandedonMars?Youmustbejoking.Thatcan’tbetrue.情态动词表主观推测：1.肯定句中用must,may,might2.否定句中用can,could,may,might3.疑问句中用can,couldmust→can→could→may→might语气依次减弱SummaryWemayaswellstayathome,watchingTV.Ican’thelplaughing.Youcannotbetoocarefultocrosstheroad.Oilwillfloatonwater.I