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1、RevisionofModule3Welcometomyclass!FranklinWenzhouNo.14HighSchool情态动词(modalverb)1) 情态动词 除ought和have外,后面只能接不带to的不定式。2) 情态动词没有人称,数的变化,即情态动词第三人称单数不加-s/ed/ing。3) 情态动词没有非谓语形式,即没有不定式,分词,动名词等形式。情态动词的语法特征情态动词主要有:1)can/could:否定或疑问的推测:不可能/可能吗2)may/might:可能性的
2、推测:可能3)must:肯定性的推测:想必4)should/oughtto:应该5)need(需要)/dare(敢)主要用在否定和疑问句中6)shall/will/would在一定场合下也可以用作情态动词1.can表示能力IcanspeakEnglishwhilehecan’t.2.表示允许CanIsithere?3.表示可能性Thiscan’tbetrue.Whatcanitmean?Theycan’thavebeentoAfrica.may1)表示允许,征求别人意见---MayIcomein
3、?---Yes,please.2)表示判断和猜测Hemaycome,butIamnotsure.Thismaybetrueormaynotbetrue.might语气婉转,或不是很肯定的猜测Don’tthrowtheemptybottleoutofthewindow.Youmighthurtsomeone.1)must表示“必须”Youmustfinishyourhomeworkatonce.Youmustn’tplaywithfire.Youmustn’tplayfootballonthero
4、ad.2)表示猜测,语气很肯定Shemustbehungry.Helookedworried.Hemusthavelosthisway.It’ssowetonthegroundthatitmusthaverainedheavilylastnight,____________?didn’titCan,could&beableto的区别We’llbeabletofinishtheworksoon.1.can只用于现在式和过去式(could)。be able to可以用于各种时态。2.Can的主语是人
5、或物,beableto的主语是人Shecan/beabletosingthesonginEnglish.3.表示特定的某一过去能力或表示成功地做了某事时,只能用was/were able to, 不能用could。Althoughthesoldierwasbadlywounded,hewasabletotellwhathadhappened.Ihaven’tbeenabletoseethefilm.Thecomputercanmakeyoufeelcomfortable.Sheranfastbu
6、tshecouldn't/wasn’tabletocatchthebus.could+have+过去分词表示对1、过去某种情况进行推测2、对已发生的动作或存在的状态进行推测Lindadidn’tcatchthetrain.Shecouldhavecaughtit.Don't worry.1.Peter___comewithustonight,butheisn’tverysure.A.mustB.canC.mayD.willC2.---CouldIcallyoubyyourfirstname?--
7、-Yes,you____.A.willB.couldC.canD.mightC3.Sorry,I’mlate.I___haveturnedoffthealarmclockandgonebacktosleepagainthismorning.A.mustB.shouldC.canD.willAwill&would常表示①promise意愿,意志,②agreement同意,③pasthabit,custom过去的习惯,④request要求判断下列句子中的can,could是属于哪种情况。Wewill
8、comehereatten.agreement,promiseHewouldsleepverylate.pasthabit,customWouldyouliketohavedinnerwithmetogether?requestwill和wouldIfyouwillhelpmewithmyEnglish,Iwillbeveryhappy.IpromisedthatIwoulddomybest.1.will和would表示意愿、意志,可用于各种人称Willyoutellhimthenewsasso