Unit2NoRulesNoOrderSectionAGrammarFocus课件七年级英语人教版下册

GrammarFocusLookandsayDon’tfightwithothers.Bepoliteandtreatotherswithrespect.Theredsignswarnthestudentswhattheycan’tdo.Thenlookatthegreensignsandsaywhattheyhavetodo.Readthesentences.Dotheverbsinredneedtochangeforms?Why?Walkinthehallways.Don’trun.Bepoliteandtreatoneanotherwithrespect.Don'tlitter./Youmustn'tlitter.Youcan'tlitter.Canwebringourphonestoclass?No,wecan’t,butwekeeptheminourlockers.Canweeatsnacksinclass?No,wecan’teatinclass,butwehavetoeatinthedininghall.Readthesentencesandanswerthequestions.Readandsummary

Don’trunintheclassroom.

Walkintheclassroom.

Don’ttalkloudly.

Keepquiet.

Don’tfightwithothers.Bepoliteandtreatotherswithrespect.Weuseimperativestogivewarningsordirections.Whendoweuseimperatives?英语句子按照用途可分为陈述句、疑问句、祈使句和感叹句四类。1.祈使句一般用来表示请求、命令、劝说、号召、警告等。2.祈使句的主语一般是第二人称you，但往往省略。3.祈使句的肯定式以动词原形开头，否定式在动词原形前加don’t。祈使句(ImperativeSentence)Walkintheclassroom.Keepquiet.Bepoliteandtreatotherswithrespect.ObserveandworkoutPositiveimperatives:_________________Do/Be+...1.Don’tbelateforschool._______ontime.ThinkandfillDoyouthinkthesestudentsbehaveproperly?Trytofillintheblankstotellthemwhattheyhavetodo.

2.Don’tsleepinclass.__________theteachercarefully.3.Nolittering.________theclassroomclean.ListentoArriveKeepTurnofftheTV,please.请关上电视--请求Goandwashyourhands.去洗手--命令Let'splaybasketball.我们去打篮球吧！--建议Bekindtoyourclassmates.对同学要友好--叮嘱Haveagoodday!过个愉快的一天--祝愿Nosmoking!禁止吸烟--禁止各种情感的祈使句Don’tbelateforschool.Don’tsleepinclass.Nolittering.ObserveandworkoutNegativeimperatives:1._______+do/be...

2._______+v.-ingDon’tNoLet’spracticeDon’tbe1.It’sanimportantmeeting.

(not,be)late.2.

(not,make)anynoise!Yourmotherissleeping.3.

(not,talk)and

(read)aloud.4.Thenoticeonthewallsays“

”.(nosmoke)5.

(look)out!Acariscoming.6.

(not,let)thebabycry.7.Let’s

(notsay)anythingaboutit.Don’ttalkDon’tmakereadNosmokingLookDon’tletnotsayLookandcompleteLookatthesignsandcompletethesentences.Youcanusethesewordstohelpyou.Payattentiontotheverbforms.1._______inthehallway.Don’t_______!2.________politeand________oneanotherwithrespect.3.Don’t________./Youmustn’t________./Youcan’t________.WalkrunBetreatlitterlitterlitter123littertreatwalkberunReadthesentences.Dotheverbsinboldneedtochangeforms?Why?Walkinthehallway.Don’trun!Bepoliteandtreatoneanotherwithrespect.Don’tlitter./Youmustn’tlitter./Youcan’tlitter.Canwebringourphonestoclass?No,wecan’t.Wemustkeeptheminourlockers.Canweeatsnacksinclass?No,wecan’teatinclass.Wehavetoeatinthedininghall.No,theydon’t.Becausetheverbsappearinimperativesentencesoraftermodalverbs.祈使句中情态动词后have

to①常强调客观需要，意为不得不；②有时态、人称和数的变化，其一般

现在时的第三人称单数形式为has

to,

否定形keep

itinthe

locker.OHe

nasto)

tellhisteacherwhenheis

absent

from

class.OHe

mustn't

bring

my

phone

to

class:L

mustmust的

否

定

形

式

为mustn't禁止/不准。Discuss

and

try

tofind

the

words

rules.(讨论并尝试发现规律)辨析must和havetomust①常表示说话人的主

观

看

法，

意

为必须；②

没有时态、人称和数的变化。□CanI

eatsnacksin

class?No.Ihavetoeat

inthedininghall.Morestudentstalkaboutrules,completetheconversation.Tom:OK!Thanks

for

telling

me

,Anne.Anne:You're

welcome.These

are

my

friends

Mary,Sally

and

Tony.They

can

know

more.Mary:We

can'

t

/mustn't

run

in

the

hallways,it's

not

safe.Sally:We

can't

/mustn't

wear

our

own

jackets

to

school.We

have

to

wear

school

uniforms.Tony:We

can't

/mustn't

litter.We

must

keep

the

school

clean

and

tidy.Mary:We

mus

t/have

to

do

our

homework

on

time.Wecan't

/mustn't

be

late

for

school.We

must

arrive

on

time.Sally:If

you

want

to

ask

questions

in

class,you

have

to

put

up

your

hand.

Tom:Thank

you

all.It's

very

nice

to

tell

me.2.Canwebringourphonestoclass?Yes,wecan.No,wecan't.1.Canyouplaytheguitar?Yes,Ican.No,Ican't.can常用于询问能力和许可。能力许可

情态动词can，must,havetoSb.can/can't+V原.must表示主观的义务和必要，多译为“必须”。haveto表示客观需要做的事情，多译为“不得不”(1)Don’tjumpthequeue.You___________waitforyourturn.(2)I_________feedmydogmanykindsoffood,butI___________givehimchocolate.Itisbadforhim!(3)A:CanIleavetheclassroomifIdon’tfeelwell?B:Yes,butyou___________tellyour

teacheraboutitwhenyou___________beabsentfromclass.(4)A:Hey!CanIlookatyourbook?B:Shh,we___________talkquietlyinthelibrary.(5)A:Canyouputonyourseatbelt?We___________wearonewhenwe’reinacar.B:Sure.Thanks!haveto/mustcancan’t/mustn’thaveto/musthavetohaveto/musthaveto/mustCompletethesentencesusingcan,haveto/must,orcan’t/mustn’t.2.她妈妈生病了，她不得不自己做晚饭。Hermotherisill,she

hastocookdinnerbyherself.1.他必须在晚上8点前完成作业。He

must

finishhishomeworkbefore8:00intheevening.表示个人主观想法，且没有人称和时态的变化表示外界客观原因,有人称、数和时态的变化haveto-hasto例句展示Noclimbing.Nosmoking.Nopets.Nonoise.Read,observe,andtry.•Donoteatordrink.•Noeatingordrinking.•Youcan’t/mustn’teatordrink.No+doing.Morestudentstalkaboutrules,completetheconversation.Tom:OK!Thanks

for

telling

me

,Anne.Anne:You're

welcome.These

are

my

friends

Mary,Sally

and

Tony.They

can

know

more.Mary:We

can'

t

/mustn't

run

in

the

hallways,it's

not

safe.Sally:We

can't

/mustn't

wear

our

own

jackets

to

school.We

have

to

wear

school

uniforms.Tony:We

can't

/mustn't

litter.We

must

keep

the

school

clean

and

tidy.Mary:We

mus

t/have

to

do

our

homework

on

time.Wecan't

/mustn't

be

late

for

school.We

must

arrive

on

time.Sally:If

you

want

to

ask

questions

in

class,you

have

to

put

up

your

hand.

Tom:Thank

you

all.It's

very

nice

to

tell

me.Tom

comes

to

a

new

school.His

classmates

are

veryfriendly.They

know

rules

are

important.On

the

first

day,Anne

tells

Tom

some

school

rules

here.Then

Tom

know

more

rules

in

life.Today

he

writes

a

letter

to

his

old

frierPeter.Let's

have

a

look!Writetherulesfortheothersigns.•Donotparkhere.•Noparking(here).•Youcan’t/mustn’tpark(here).•Donottakephotos.•Nophotos.•Youcan’t/mustn’ttakephotos.Writetherulesfortheothersigns.•Donotswim.•Noswimming.•Youcan’t/mustn’tswim.•Donotfeedthebirds.•Nofeedingthebirds.•Youcan’t/mustn’tfeedthebirds.祈使句否定结构1.Don’t+动词原形+其他.Don’tbelateforschool.2.Don’tlet+宾语+动词原形+其他./Let+宾语+not+动词原形+其他.Don’tlethergo./Lethernotgo.Do型Be型Let型否定结构都一样Completethensentencesusingcan,haveto/must,can’t/mustn't.Don'tjumpthequeue.You____________waitforyour

turn.I

feedmydogmanykindsoffood,butI___________givehimchocolate.Itisbadforhim.haveto/musthaveto/mustcan't/mustn'tCompletethensentencesusingcan,haveto/must,can’t/mustn't.3.A:CanIleavetheclassroomifIdon'tfeelwell?B:Yes,butyou______________tellyourteacheraboutit

whenyou____________beabsentfromclass.must/havetohavetoDear

Peter,Howisitgoing?My

schoolis

very

large

and

safe.My

classmates

are

friendly.On

my

first

day

in

class,Iknowsomeschoolrules.CanIeat

snacksin

class?No.I

can't

eat

snacks

in

class.I

have

to

eat

in

the

dininghall.CanIanswermyphoneinclass?No,Ican't.Imustn'tbringmyphonetoclass.Imustkeepitinthelocker.I

have

to

tell

my

teacherwhenIamabsentfromclass.Onthesecondday,Iknow

some

other

rules

in

life.Don'tjumpthe

queue.It's

the

same

in

our

country.

Don'tgivepetschocolatebecauseit'sbad

forthem.No

talking

in

the

library.Wear

abelt

in

a

car.In

class,my

teacher

quiet.Listen!Rules

are

safe.RulesMs

Brown

often

c