牛津版八年級上Unit4-grammar課件(共54張ppt)

GrammarUnit4GrammarATurnleft!GuessingGameTurnright!GuessingGameWalkonthezebracrossing!GuessingGameGuessingGameDon’tsmoke!Nosmoking!GuessingGameDon’tparkyourcar!GuessingGameDon’tpicktheflowers!Readandobserve(觀察)Turnleft!Turnright!Walkonthezebracrossing!Don’tsmoke!Don’tparkyourcar!Don’tpicktheflowers!Theyareallimperativesentences.（祈使句）句子Westartasentencewiththebaseformofaverbwhenwewanttotellpeoplewhattodo.Weadd‘don’t’infrontoftheverbwhenwewanttotellpeoplenottodosomething.祈使句的結(jié)構(gòu)如下：

dosth

Don’tdosth.肯定：否定：祈使句表示請求、命令、建議等等。謂語動詞一律用原形。句子中通常不用主語，句末用感嘆號或者句號。Drawtheconclusion(得出結(jié)論)祈使句句式詳解1.

肯定的祈使句

（1）動詞原形+其他

Stand

up,

please.

=

Please

stand

up.

請起立。

（2）Be

+

adj.

Be

careful!

=

Look

out!

=

Take

care!

小心

/

當心！

（3）Let's

+

動詞原形

Let’s

go

to

school

together.

咱們一起上學去吧。祈使句句式詳解2.

否定的祈使句（1）

Don't

+

動詞原形

Don't

stand

up.

別站起來。

Don't

be

careless.

別粗心。

Don't

let

them

play

with

fire.

別讓他們玩火。

（2）Let's

(

let

sb

)

+

not

+

動詞原形

Let's

not

say

anything

about

it.

對于這件事，咱們什么也別說。

Let

them

not

play

with

fire.

別讓他們玩火。祈使句句式詳解

與please連用,使語氣委婉

為使語氣委婉，通常將祈使句與please連用。Please可用于祈使句的句首，通常不用逗號如果用于句末，前面通常用逗號。如：Pleasedon’tgetangry.請不要生氣。Pleasedrivemoreslowly.請開得慢一點。

Trytobequiet,please.請設(shè)法保持安靜。

Putupapictureonthewall.Putupashelfonthewall.TrytogiveinstructionsDon’tswimhere.Don’tparkyourbikehere.Parkyourbikehere.Pleasegoslowly.Don’tsmokehere.Don’tfishhere.Bequiet,please.Don’tmakeanynoise.Millieisteachingherclassmateshowtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstruction.Howtomakecards_____outpiecesofcardwithapairofscissors.Cut

cutdrawgivekeeplooktrywrite_____somewordsorasentenceoneachcard.Write

cutdrawgivekeeplooktrywrite_____apictureaboutthewordsorsentenceontheothersideofthecard.Draw

cutdrawgivekeeplooktrywrite_____atthepictureand___torememberwhatisontheotherside.Looktry

cutdrawgivekeeplooktrywritePlease_________(not)up.____trying,andyouwillfindyoucanrememberthingsbetter.

don’tgiveKeep

cutdrawgivekeeplooktrywrite1--It’sherbirthdaynextweek.--Then___________heraboutthesurprisebirthday.(tell)2–HowcanIgettoPeople’sHospital?--_____alongthestreetand______leftatthelights.don’ttellturn

GoExercises3--Wehavetofinishtheworkintwohours.--Thenlet’s__________anytime.(waste)4--____________somuchnoise,please.--Ok.(make)notwasteDon’tmake1.剪出……2.寫一些話或一個句子3.在每張卡上4.在卡的另一面5.嘗試做某事6.記住某事7.放棄8.放棄某事/做某事9.堅持嘗試10.把事情記得更好cutout…writesomewordsorasentenceoneachsideontheothersideofthecardtrytodosth.remembersth.giveupgiveupsth./doingsth.keeptryingrememberthingsbetterUsefulExpressionsGrammarBUsingshouldandhadbetterWeuse‘should’and‘hadbetter’whengivingadviceandtellingpeoplewhatisthebestorrightthingtodo.Thetoneofhadbetterisstrongerthanshould.had

better

do

sth

had

better

not

do

sth

It

is

pretty

cold.

You'd

better

put

on

my

coat.

She'd

better

not

play

with

the

dog.shoulddosthshouldnotdosthYoushouldbequietinclass.Youshouldnotbelateforschool.1.PleaseknowalittleaboutDIY.YoushouldknowalittleaboutDIY.Weuse‘should’and‘hadbetter’whengivingadviceandtellingpeoplewhatisthebestorrightthingtodo.YouhadbetterknowalittleaboutDIY.2.Pleaseputinabrighterlightintheroom.Youshouldputinabrighterlightintheroom.Weuse‘should’and‘hadbetter’whengivingadviceandtellingpeoplewhatisthebestorrightthingtodo.Youhadbetterputinabrighterlightintheroom.3.Don’thitthepipe.Youshouldnot/shouldn’thitthepipe.Youhadbetternothitthepipe.Weuse‘should’and‘hadbetter’whengivingadviceandtellingpeoplewhatisthebestorrightthingtodo.4.Don’tpaintthewholeroomblue.Youshouldnot/shouldn’tpaintthewholeroomblue.Youhadbetternotpaintthewholeroomblue.Weuse‘should’and‘hadbetter’whengivingadviceandtellingpeoplewhatisthebestorrightthingtodo.DIYadviceSuzyisgivingDIYadvicetoherclassmates.Readtheadvicebelow.HelpSuzymakesentenceswithshould(not)orhadbetter(not).DIYadviceReadtheadviceandmakesentenceswithshould(not)orhadbetter(not).beginyourworkwithoutreadingthem

Youshouldn’tbeginyourworkwithoutreadingthem.Youhadbetternotbeginyourworkwithoutreadingthem.DIYadviceReadtheadviceandmakesentenceswithshould(not)orhadbetter(not).joinaDIYclubtolearnmoreaboutit

YoushouldjoinaDIYclubtolearnmoreaboutit.

YouhadbetterjoinaDIYclubtolearnmoreaboutit.DIYadviceReadtheadviceandmakesentenceswithshould(not)orhadbetter(not).bepatient

Youshouldbepatient.Youhadbetterbepatient.DIYadviceReadtheadviceandmakesentenceswithshould(not)orhadbetter(not).buysometolearnmoreaboutit

Youshouldbuysometolearnmoreaboutit.

Youhadbetterbuysometolearnmoreaboutit.DIYadviceReadtheadviceandmakesentenceswithshould(not)orhadbetter(not).playwiththemwhenyoudoDIYjobsYoushouldnotplaywiththemwhenyoudoDIYjobs.YouhadbetternotplaywiththemwhenyoudoDIYjobs.abeginyourworkwithoutreadingthembjoinaDIYclubtolearnmoreaboutit

cbepatient

dbuysometolearnmoreaboutit

eplaywiththemwhenyoudoDIYjobs1.TherearemanyusefulbooksaboutDIY.Youshould/hadbetterbuysometolearnmoreaboutit.2.DIYisnoteasy.You

should/hadbetterjoinaDIYclubtolearnmoreaboutit.You

shouldn’t/hadbetternotbeginyourworkwithoutreadingthem.3.Instructionsareimportant.You

should/hadbetterbecarefulwhenyouusethem.4.Scissorscanbedangerous.You

should/hadbetterbepatient.5.Sometimesit’lltaketimetodoaDIYjob.1.當我們向他人發(fā)出命令、提出要求或建議時，常使用祈使句。其主語通常不明確表示出來。其否定形式是在動詞原形前加donot/don’t。為了表示客氣和禮貌，可以加上please。2.當我們給他人提建議時，可以用hadbetter和should，表示“最好”或“應(yīng)該”做某事。否定形式是hadbetternot和

shouldnot/shouldn’t。ReflectionLet’sdoexercise.1.Jim,_____meahand.A.givesB.isgivingC.willgiveD.give2.____careful,Jenny!Thereisatreeinfrontofyou.A.AmB./C.BeD.Was3.Let's____ourtime.A.notwasteB.nowastingC.nottowasteD.nowaste4.—____higher,andyouwillseethehouse.

—OK.A.IfyoustandB.TostandC.WhenyoustandD.StandExercises:5.Please___doit.A.heB.lethimC.letheD.him6._____letanyoneopenthedoor.A.Don'tB.WillC.NotD.No7.—Don’tbelateagain.

—Sorry,______.A.ImayB.ImustC.IwillD.Iwon’t8.—Callmewhenyougethome.

—OK,____.A.ImustB.IcanC.IwillD.ImayExercises:9._____forgettowritetomewhenyou_____gettherenextTuesday.A.Don't;willB.Please;willC.Please;/D.Don't;/10._____letanyoneopenthedoor.A.Don'tB.WillC.NotD.No11.____6and4,andyouwillgetten.A.AddedB.AddingC.ToaddD.Add12..____lateagain,orI’llreportittoyourfather.A.Don’tbeB.Youaren’tC.Can’tbeD.Aren’t

13.--CanIleavethisdooropenatnight?---You_______betternot.A.shouldB.wouldC.couldD.had14.You_____smokewhileyouarewalkingaroundinthewoodshere.A.shouldB.shouldn'tC.shouldn’ttoD.shouldtoI.單項選擇。1.TheTVistooloud.Please_______.

A.turnitdown

B.toturnitdown

C.turndownit

D.toturndownit

2._______lateagain,Bill!

A.Don'ttobe

B.Don'tbe

C.Notbe

D.Benot3._______crosstheroaduntilthetrafficlightsturngreen.

A.