【语法】情态动词can(not),must(not)-完整版课件

情态动词can(not),must(not)Warm-upLookatthepicture.Trytospeakoutasmanyclassrulesasyoucan.Use"must"or"mustnot"Wemustkeepquietintheclass.Wemustlistentoourteachers.wemustnotbelate.Wemustnoteatanddrink.Wemustnottalkloudly.Warm-upLead-inWemustnotridebicycleshere.Wemustnotflykiteshere.Herearesomesignsinthegardencity.Whatdotheymean?PracticeWemustnotfishhere.Wemustnotsmokehere.Herearesomesignsinthegardencity.Whatdotheymean?Lead-inWemuststopourcarhere.Wemustnotpickflowershere.Herearesomesignsinthegardencity.Whatdotheymean?Lead-inWecangetusefulinformationhere.Wecanhaveabarbecuehere.Herearesomesignsinthegardencity.Whatdotheymean?Lead-inThereisashelterhere.Youcanhavearesthere.Wecanusethetelephoneforhelp.Herearesomesignsinthegardencity.Whatdotheymean?Lead-inWecangocampinghere.Wemustturnlefthere.Herearesomesignsinthegardencity.Whatdotheymean?Lead-inWecanparkourcarhere.Thereisahospitalhere.Wecangethelphere.Herearesomesignsinthegardencity.Whatdotheymean?PresentationThereareusuallysomesigns

inpublicplaces.Theymayexpressawarning、aninformation、adirectionandaninstruction.Trytounderstandthesigns.canandcannotmustandmustnotmust:必须mustnot：禁止Can:可以，能Cannot:不可以，不能PresentationWemustlistentoourteachers.Wemustnoteatanddrink.PresentationWecanusethetelephoneforhelp.Wecannottalkloudlyhere.PracticeWhatkindofsignisit?——————————It’sawarningsign.Wherecanwefindit?———————————Inapark.PracticeWhatkindofsignisit?——————————It’sadirectionsign.Wherecanwefindit?———————————Inthestreet.Practice【2013江苏淮安】—Can

I

park

my

car

in

front

of

the

building?

—No,

you

________.

A.

won't

B.

can't

C.

needn't

D.

couldn't

【解析】B。问句是由can引导的一般疑问句因此用can't作否定回答,所以选择B。

直击中考Practice【2013四川广安】

—____I

swim

here?

—No,

you

_____.

Look

at

the

sign

―No

swimming.

A.

Must;can’t

B.

Can;

don’t

C.

Can;

mustn’t

【解析】C。must引导的问句，否定回答用needn’t或don’t

have

to，排除A项；can

引导的问句，否定回答用can’t，排除B项；由句意―我可以在这里游泳吗？―不，千万不要。看一下那个标牌‗禁止游泳。可知C项符合题意。【2013江苏徐州】—Can

I

borrow

your

ruler,please?

—Yes,you

_____.

But

you

must

return

it

to

me

before

lunchtime.

A.

have

B.

can

C.

must

D.

used

to

Practice【解析】B。答句意为