英語必修三 unit1 情態(tài)動詞(第一講)

情態(tài)動詞Modalverbmay/mightWhatawarddidyougetforthesportscompetition?MayIhavealook?Ourfootballteamdidn’tplayverywelltoday,butwemightdobettertomorrow.

Mayyousucceed!表示許可或征詢對方許可，常譯為“可以”。表示對現(xiàn)在或過去情況的推測，常譯為“可能”。祈使句中表祝愿。May+主語+動原It’srainingheavily.We_______aswellstayathome,watchingTV.A.willB.canC.shallD.maymay/mightaswell……還不如，不妨，最好Dcan/couldJimisn’tverygoodatmathsorscience,buthecanspeakEnglishverywell.Itwasthelastdayofschool,buttheteachersaidthatwecouldnotleaveearly.表示能力，譯為“能；會”。表示請求或許可，譯為“可以”。Thehuntershavebeenlostfordays.Theycouldstarve.Howcouldyousaytoyourfatherlikethat?表示驚訝、懷疑，譯為“會；能”。表示對現(xiàn)在或過去情況的推測，譯為“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；無論…也不過分Youcannotbetoocarefultocrosstheroad.=Youcannotbecarefulenoughtocrosstheroad.不得不/只好做某事cannot/couldn’tbutdocannothelpbutdocannotchoosebutdocandonothingbutdohavenochoicebuttodohavenothingtodobutdowill/would表示習(xí)慣性動作或某種傾向時，譯為“常常；習(xí)慣于”。Oilwillfloatonwater.Myunclewaspoorbutlikedfashion,sohewouldoftendressupasarichman.Thedoorwon’topen.Theradiodoesn’twork.shall/shouldYoushallnotleaveyourpost.Sheshouldhavepassedtheexam.Themanshouldbesorudetoalady.shallnot不得，不能shouldhavedone本應(yīng)該做卻未做should表示吃驚

，可譯為“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.情態(tài)動詞表主觀推測：1.肯定句中用must,may,might2.否定句中用can,could,may,might3.疑問句中用can,couldmust→can→could→may→might語氣依次減弱SummaryWemayaswellstayathome,watchingTV.Ican’thelplaughing.Youcannotbetoocarefultocrosstheroad.Oilwillfloatonwater.I