高中英语模块四unit 2 Grammar and usage课件译林牛津版必修4.ppt

Grammarandusage
情态动词没有人称和数的变化，有词义，但是不完整，不能单独做谓语，必须和不带to的动词不定式连用。(1)Hecanrunthe100msprintin11seconds.
(2)Canthislittlegirlreadbeforeshegoestotheprimaryschool?can/beabletoobligationhaveto/must2)must表示主观看法，haveto则侧重于客观需要。如：
Wemustbestrictwithourselvesineverything．
Incitieswithmanycars,somepeoplehavetowearmasks．ShemightwinamedalattheOlympics.
Shemaybeathomenow.
Shecouldreadandwriteattheageof4.
Sheshouldcometojoinus.
Sheoughtto/will/musthelpmewheneverIamintrouble.

can/could/may/might--Will/Can/Could/Wouldyouhelpmewithmytraining?
--Yes,Iwill/can/can/will.makesuggestionsmakeoffers和其他时态的连用musthavedone的反意疑问句shall可以用来征求对方意见。用于第一、三人称。此外它也可以用来表示说话人的命令、警告、允诺、威胁或决心等，这时它用于第二、三人称。如：
Shallshegototheconcertwithusthisevening？(征求意见)
Youshallgotothefrontatonce．(命令)
Don’tworry．Youshallgettheanswerthisveryafternoon．（允诺）
Heshallbesorryoneday．Itellyou．(警告)
Nothingshallstopusfromfightingagainstpollution．(决心)will在肯定句中表示意愿或决心时，是可以用于条件状语从句的。在疑问句中用于第二、三人称表示意愿。如：
Willyougohikingwithmeinthemountain?
Willhepayforme?
Ifyouwilllistentome,I’llgiveyousomeadviceonhowtolearnEnglish．
Ifyouwillcomethisway,themanagerwillmeetyou．
mustn’t/needn’tneed/dare用作实义动词时，可用于各种句式．
Weneedtotellhimthenews.Youdon’tneedtotellhimthenews.
Dotheflowersneedwatering?
Ididn’tdaretotellyouthetruth.
Wouldyoudaretocatchthesnakewithyourhand?
Theboydarestodoanythinghelikes.Haveatry!1.Aleft-luggageofficeisaplacewherebags____beleftforashorttime,especiallyatarailwaystation.
A.shouldB.canC.mustD.will3.--Theroomissodirty.____wecleanit?
--Ofcourse.
A.WillB.ShallC.WouldD.Do5.--Ihearyou’vegotasetofvaluableAustraliancoins.___Ihavealook?
--Yes,certainly.
A.DoB.MayC.ShallD.Should7.--AreyoucomingtoJeff’sparty?
--I’mnotsure.I__gototheconcertinstead.
A.mustB.wouldC.shouldD.might9.--WhencanIcomeforthephotos?Ineedthemtomorrowafternoon.
--They___bereadybyby12:00.
A.canB.shouldC.mightD.need11.Whenhewasthere,he___gotothatcoffeeshopatthecornerafterworkeveryday.
A.wouldB.should
C.hadbetterD.might