Unit5Grammar课件牛津译林版英语八年级上册2

Xiwang

100grams8kilograms35kilogramsweightfoodactionproblemsmother’smilkbambooHelppandashavemorebabiesBuildmorereservesMakelawsRetellthestoryWhatwillhappentogiantpandasifwedonothing?Ifwedonothing,theremaybenoneleft.HerearesomesentencesusingmayinUnit5.

may表示可能性（用于肯定句中或否定句中）maynotdo...意为“可能不......”PartOneUsingmayforpossibilityMaybeitissleeping.It____________________.Haveaguess!maybesleepingWhatisitdreamingabout?Itmaybedreaming.Itmayseeitsmaster.Itmayfindsomefood.Itmayplaywithitsfriend.Findtherulesofusing“may”may+v原，表示“可能”Maybeitdoesn'tlikethetaste.It__________________thetaste.Maybethefoodisnotyummy.Thefood______________yummy.maynotbemaynotlikeWhydoesn'titeatthefish?Maybeitdoesn'tfeelhappy.It__________________happy.Maybeitdoesn'thaveanyfriends.It______________anyfriends.maynotfeelmaynothaveItmaynotlikethefood.Thefoodmaynotbeyummy.Itmaynotfeelhappy.Itmaynothaveanyfriends.Findtherulesofusing“may”maynot+v原，表示“可能不”1.The

elephant

is

going

towards

the

water.

It

__________(need)

a

bath.2.The

little

boy

is

crying

because

he

saw

the

tigers.

He

__________(be)

afraid

of

them.

3.I

cannot

go

near

the

lions

and

tigers.

They

___________(hurt)

me.

4.The

baby

panda

is

not

drinking

its

mums

milk.

It

____________(not

be)

hungry.

5.The

monkeys

are

jumping

around.

They

_______________(be

playing)

with

each

other.

6.The

horse

is

standing

with

its

eyes

closed.

It

_________________(be

sleeping).

maybemayhurtmaynotbemaybeplayingmaybesleepingP61InthezoomayneedHemaynotknowthetruth.他可能不知道真相。Hecan’tknowthetruth.他不可能知道真相。Compare:注意：在否定句中常用can’t表示“不可能”他现在不可能在家，因为他房间里的灯是关着的。Hecan’tbeathomenow,becausethelightisoffinhisroom.may不是唯一的表示可能性的情态动词，如图所示：语气弱中强(100%)肯定推测mightmaymust(一定)否定推测Tip：can不能表示肯定推测，mustn't不能表示否定推测，而表示“不准，禁止”,may不能用于提问。那会是真的吗？Maythatbetrue?×Canthatbetrue?√mightnotmaynot(可能不)cannot(不可能)表示“许可或请求许可”，这种情况下，与can同义，可以互换使用。你可以休假两天。我可以使用这把剪刀吗？回答可以用Yes,youcan./

No,youcan’t.也常用Yes,please./Certainly./Ofcourse.否定回答可以用

Sorry,youcan’t./

No,youmustn’t./No,pleasedon’t.Youmay/canhavetwodaysoff.May/CanIusethispairofscissors?Usingmayforpermission（许可）(1)—Whoismakingmuchnoise?—It____beTimmy.Heissleepingnow.A.can’t B.maynot C.mustn’t D.couldn’t(2)—Cathy,Ijusthelpedyoucleanupyourroom.—Thanks.Butyou________doit.Icouldmanage(设法完成)itmyself.A.can’tB.mustn’tC.needn’tD.shouldn’t(3)—DoyouhaveanyplansforthisSunday?—I’mnotsure.I_______gotothecountrysidetoseemygrandmother.A.can B.must C.may D.need课堂练习ACC(4)—IsthewomanoverthereLily’smother?—Oh,that_____behermother.Shelookssoyoung!A.shouldB.mustC.can’tD.may(5)—Wow,anothergift!What'sinthebox?—I'mnotsure.It_________beasmartphone.A.mustB.wouldC.mayD.should(6)—Willitbesunnythisafternoon?—It_________fine.Whoknows?Theweather(天气)alwayschangesquickly.A.mustbe B.willbe C.maybe D.canbeCCCPartTwoUsingverbs+“to”-infinitivesUsingverbs+“to”-infinitives1.Whatdopandasstarttodoat4monthsold?Theystarttogooutsideforthefirsttime.2.Whatdopandas

begintodowhentheyaresixmonthsold?Theybegintoeatbamboo.3.Whatdopandaslearntodoat20monthsold?Theylearntolookafterthemselves.zebra['ziːbrə]Whentheyareindanger,theywilltry_________(run)asfastastheycan.Bearsdonotlikelivingtogether.Theyhope___________(live)alone.Let'sknowmoreaboutanimals!toruntolive动词不定式在句中常作谓语动词的宾语,这一类谓语动词常见的有:agreebegindecidefailforgethopelearnplanprepareremembertrywant

想要做某事希望做某事计划做某事同意做某事决定做某事学习做某事选择做某事准备做某事

Translatesomephrases:wanttodosth.hopetodosth.plantodosth.agreetodosth.decidetodosth.learntodosth.choosetodosth.preparetodosth.动词不定式:

verbs+‘to’-infinitivesdolphin['dɒlfɪn]bat[bæt]bee[biː]squirrel['skwɪrəl]learntoworkoutdecidetoflybegintosave（储存）Learnmoreanimalsanddoexercises“to+动词原形”的结构，我们把这种结构称为动词不定式。动词不定式没有人称和数的变化，在句子中不能单独作谓语，其否定形式是“notto+动词原形”。Verbs+to-infinitives动词不定式什么是动词不定式learntoworkoutdecidetoflybegintosave（储存）注意：动词不定式的否定形式是“notto+动词原形”。promisetodosth.承诺去做某事promisenottodosth.承诺不去做某事如:Youmustpromisenottobelateagain.你必须保证不再迟到了。动词不定式是一种活跃的非谓语动词。它在句中作主语、宾语、定语、状语或宾语补足语。动词不定式的形式是“to+动词原形”，但to有时要省略。动词不定式在具体运用时，用不用to，取决于谓语动词的用法。动词不定式Wedon’tuse‘to’aftertheseverbs.1.let

Theteacher

lets

him____（read）loudly.2.

make

Thejoke

makes

me_______

（laugh）.3.

see

Ioften

seehim_____（carry

）water.4.hearDoyouhearbirds_____（sing）everymorning?readlaughcarrysingremembertodosth.记得去做某事

rememberdoingsth.记得做过某事区分forgettodosth.忘记去做某事

forgetdoingsth.忘记做过某事stoptodosth.停下(正在做的)事去做(另一件)事stopdoingsth.停止做(正在做的)事区分课堂练习PartThree一、单项选择。1.Mydadtaughtme_______(drive)andboughtacarasmybirthdaypresent.2.Ittookherthreehours_________(prepare)thedeliciousmeal.3.Allofuswant________(go)tothoseinterestingplaces.4.Heagreed_______(help)hisgrandmawiththehouseworkeveryday.5.Whydidhechoose________(take)abustothehill?todrivetopreparetogotohelptotake用所给词的适当形式填空。6.Weshouldlearn_________(look)afterourselves.7.Wouldyoupleaselettheoldman______(sit)downonyourseat?8.Theyplan________(stay)athomeandwatchTVtomorrow.9.Gotobedafter_______(finish)________(watch)T