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1、ModalVerbs(情态动词)一、概述1.常见情态动词：can(could),may(might),must,haveto(hasto/hadto),shall(should),will(would),oughtto，dare(dared),need(needed)等。其中could/might/should/would分别是can/may/shall/will的_________,还可表示委婉的语气。e.g.：Iwouldlikesometea.(这里不是过去式，而是委婉)2.Hecouldbeheresoon.Wecan'tcarrytheheavy
2、box. Youdon’thavetogo.结构是_______+_______,否定一般在________后加not，而have(has/had)to则在前加__________________,情态动词无_________的变化；不能_______使用，必须与_________构成谓语二、基本用法1.can/could：①表“能力”；②疑问句和否定句中表“怀疑，猜测”或“可能性(理论上)”；③表“许可”，可和may互换e.g.:IcanspeakEnglish.________CanIcomein?_____Canitbetrue?____Themoo
3、ncannotalwaysbeatthefull.______⑴-Canyouplaywithayo-yo?-Yes,I___.It’seasy.A.mustB.canC.needD.may⑵Blackholes___notbeseendirectly,sodeterminingthenumberofthemisatoughtask.A.canB.shouldC.mustD.need⑶-Look!Mr.Huisontheothersideofthestreet.–It__behim.HehasgonetoLanZhou.A.mustn’tB.can’tC.
4、shouldn’tD.won’t⑷Wehopethatmanypeople__joinusforthepicnictomorrow.A.needB.mustC.shouldD.can2.may/might:①表“允许或征询对方许可”；②表“可能性，猜测”e.g.:Youmaystayhere.MayIaskyouaquestion?____Tommightnevercome.______⑴.–___IborrowyourMP３？－Sure.Hereyouare.A.MayB.ShouldC.MustD.Would⑵.You’dbettergoandaskM
5、r.Yang.He____knowhowtosearchtheInternet.A.canB.wouldC.mayD.could⑶.-Excuseme.IsthistherightwaytotheSummerPalace?–Sorry,Iamnotsure.Butit__be.A.mightB.willC.mustD.can3.must:①表“应该，必须”；②mustn’t表“禁止（义务、责任）”；③表“推测(肯定句)”，否定是can't／couldn't（一定不是），而不是mustn’t;改：Hemustn’tbeathome,becauseIsawhi
6、minthelibraryjustnow.④must的疑问句，否定回答用needn’t或don’t/doesn’thavetoe.g.:-Mustwefinishtheworktomorrow?–No,youneedn’t(don’thaveto).⑤有时表“偏偏”e.g.:Wheneveryonewasinbed,hemustturnontheradio.当每个人都睡觉的时候，他偏偏打开了收音机。⑴.-____Ifillinthecheck-informrightnow,sir?-No,youneedn’t.Youcancompleteitthisaft
7、ernoon.A.MayB.CanC.WouldD.Must⑵.-Musthecometosignthispaperhimself?–Yes,he___.5A.needB.mustC.mayD.will⑶.You__playonfootballonthestreet.Itisdangerous.A．mustn’tB.mayC.can’tD.must⑷Tom,you__leaveallyourclothesonthefloorlikethis!A.wouldn’tB.mustn’tB.needn’tD.maynot⑸．-WhereisJack?–He__be
8、inthereadingroom.A.canB.needC.wou
