2025届高考英语二轮复习 情态动词课件(共37张PPT).pptxVIP

情态动词;1.情态动词的类型：

1)只作情态动词的有：must,can(could),may(might),oughtto

2)可作情态动词也可作实义动词的有：need,dare

3)可作情态动词也可作助动词的有：shall(should),will(would)

4)具有情态动词的某些特征的有：have(had)to,usedto;2.情态动词的特征：

1)有一定的词义，但不能单独作谓语，要和动词原形连用构成谓语。

2)适用于主语的各种人称和数(haveto例外，主语是第三人称单数时，要用hasto)。

e.g.We/Hemuststudyhard.

Hehastowalkhome.;3)后面接动词原形。

e.g.Hemaylosehisway.

4)具有助动词的作用，即可用来构成否定句、疑问句及用于简略答语。

e.g.—Ican’tswim.Canyouswim?

—Yes,Ican.;1.can和could;can/

could

can/

could;can/

could

can/

could;2.may与might;may/

might

may/

might;may/

might

may/

might;3.must与haveto;must

must;haveto

haveto;4.shall,should与oughtto;should

should;should

should;ought

to

ought

to;5.will与would;6.need与dare;dare

dare;?7.“情态动词+havedone”结构;;cannot/couldnothavedone;should/oughttohavedone;hadbetterhavedone;8.几组易混淆情态(助)动词;;;2.Jimsayswe__________stayinhishouseaslongasweleaveitcleanandtidy.(天津卷2020)

A.must???B.can????C.?need???D.?should;Ruth:Akane,whatdoyouthinkaboutchildrenhavingmobilephones?

Akane:Well,Ithinkit1.__________(can,need)beagood

thing,Imeanforsafetyreasons.

Ruth:Really?

Akane:Yes.IfIwereaparent,Iwouldfeelsaferknowingthat

mychildrenhadamobilephoneandI2.__________(might,could)getintouchwiththemwheneverIneededto,andifsomethinghappens,likeanemergency,thenthey3.__________(can,should)usethemobilephone.;Ruth:Iwouldarguethatitsquitedangerousactually,becausechildren4.__________(might,must)walkintotheroadwhiletheyaretalkingontheirmobilephonesanddontpayattentiontotraffic.

Akane:Well,thatsagoodpoint,butthat5.__________(can,oughtto)alsoteachthemresponsibilityaswell.Ifmobilephonesareunsafe,bicyclescouldbeunsafeandtoys6.__________(may,should)beunsafe,butthatsallpartofgrowingup.Ithinkifyouteachthemresponsibility,it7.__________(shouldnt,ne