2023学年完整公开课版AUnitDoityourselfGrammar

Unit4GrammarGivinginstructions&Using'should'and'hadbetter'TolearntogiveinstructionsTolearntouseshould&hadbetterObjectivesTurnleftTurnrightWalkstraightCanyouguesswhatthesesignsmean?Don’tsmoke.Don’ttalkloudly.Don’ttakephotos.Whatcanweusesuchsentencestodo?*Turnaround!*Walkstraighton!*Becareful!*Don’tmoveforward!*Don’tbehurried!*Drawanose!TellpeoplewhattodoortellpeoplenottodosomethingGivinginstructions1.祈使句的概念祈使句表示请求、命令等。它的主语是?you（听话人），通常不说出。祈使句肯定结构中的谓语动词一律动词原形。祈使句末用惊叹号或句号，句子用降调。2.祈使句的结构

1)祈使句的肯定结构①Do型（以行为动词原形开头），例如：

Sit

down!坐下！

Stand

up!起立！

②Be型（以be开头），例如：

Be

quiet!安静！

Be

careful！小心！●表示请求、劝告的祈使句还常常在句前或句末加上please,

构成句式：Please…或…,please.

以使语气更加缓和或客气。例如：

Please

stand

up.或Stand

up,please.请站起来。

Please

have

a

rest.或Have

a

rest,please.请休息一下。也可以加个人名。Sandy,Stand

up,please.

2)祈使句的否定结构，一律在肯定结构加

Do

not

(Don’t)。例如：

Don’t

go

there,please.请别去那儿。Don’t

be

late

for

class!上课别迟到！Don’t

let

him

in.

不要让他进来。祈使句的否定也可以用Never+动词原型注意回答：OK/sorry，Iwon’t.注意：祈使句，and/oryouwill…Getupearlier,andyouwillarriveontime.Getupearlier,oryouwon’tarriveontime.可以和if的句型互换Ifyougetupearlier,youwillarriveontime.Ifyou

don’tgetupearlier,youwon’tarriveontime.Let'slearntodoaDIYjob!cutwritedrawlook&sayDoyouknowhowtomakecards?_______outpiecesofcardwithapairofscissors._______somewordsorasentenceoneachcard._______apictureaboutthewordsorsentenceontheothersideofthecard._______atthepictureand______tosaywhatisontheotherside.Please__________(notgive)up._______tryingandyouwillfindyoucanrememberthingsbetter.CutWriteDrawLooktrydon’tgiveKeepWecandrawaconclusion!肯定形式：Do(V原形)+sth.否定形式：Don’tdosth.肯定形式：Be+表语(adj./n.)否定形式：Don’tbe+表语(adj./n.)Howtomakesentencesinapoliterway?

houldSometimesorderingothersisnotawisechoicebutgivingadviceinapolitewayisthebest!

Wecanchangethestrongword“must”into“s______”.Whatcanweusetogiveadvicepolitely?Whatcanyousaytoyourparentsorteacherswhenyouwanttogivethemsomeadvice?should&hadbetterTellpeoplewhatwethinkisthebestorright

thingtodoGivingadviceThetoneisstrongerhadbetter(常简略为’dbetter)，是一固定词组，后面必须跟动词原形，没有人称和数的变化。构成：hadbetterdosth.句型。You’dbettergotohospitalatonce.你最好立即去医院看病。

Tom,you’dbettergotheretoday.汤姆，你最好今天去那儿。hadbetter的否定式是将not直接放在hadbetter的后面。Youhadbetternotmissthelastbus.你最好不要错过末班公共汽车。should后面也要跟动词原形，且没有人称和数的变化。Youshouldstopsmoking.你应该戒烟。should的否定式是shouldnot/shouldn’t。Youshouldn’tdrinkanddrive.你不应该喝酒后开车。Groupwork:DoyouknowhowtogiveDIYadvicetoothers?TherearemanyusefulbooksaboutDIY.DIYisnoteasy.Instructionsareimportant.Scissorscanbedangerous.Sometimesit’lltaketimetodoaDIYjob.Youshould/hadbetterbuysometolearnmoreaboutit.Youshould/hadbetterjoinaDIYclubtolearnmoreaboutit.Youshouldnot/hadbetternot

beginyourworkwithoutreadingthem.Youshouldnot/hadbetternot

playwiththemwhenyoudoDIYjobs.Youshould/hadbetterbepatient.Wecandrawaconclusion!肯定形式：shoulddo+sth.否定形式：shouldnotdo+sth.肯定形式：hadbetterdosth.否定形式：hadbetternotdosth.ConclusionTones(语气):hadbetter>shouldBothofthemfollowsa_____behind.doCanyougroupmyinstructionsintotwoparts?*Turnaround!*Walkstraighton!*Becareful!*Don’tmoveforward!*Don’tbehurried!*Drawanose!肯定形式否定形式请点击Drawtheconclusion(得出结论)祈使句的结构如下：

(Please)+dosth.

(Please)+Don’tdosth.肯定：否定：祈使句的句型：Bequiet.Pleasehaveaseat.David,payattention.Don’tbeafraid.Pleasedonot

make

anoise.Alan,don’t

belate.1.动词+…2.Please+动词…

3.人名+动词…肯定否定在动词前面加don’t否定Givingorders/instructions

祈使句:是表示请求、命令、建议等句子，通常说话的对象是第二人称you,you常被省略。注意：Let’s+（not）动词原形…Eg.Let’sgohometogether./let’snot

talkintheclass.2.let’s……,shallwe?3.Letsb….,willyou?

4.祈使句，willyou?反意疑问句祈使句

祈使句,无主语,只用动词就可以.表示请求或命令,加上please表客气。如果变成否定句，Don’t开头是规律。Notalking!是警示，祈使句用法要牢记。Let’sdosomeexercises!___________(notbe)lateforschoolagain.It’scoldtoday.Youhadbetter___________(notwear)adress.Weshould________(do)ourbesttolearnEnglishwell.It’sraining.Let’s______________(notgo)totheplayground.Youmustletyourson_________(do)hishomeworkbyhimself.Don’tbenotweardonotgodoLet’sdosomeexercises!()1.—Jim,_____readbookswhileyouarewalkinginthestreet. It’sverydangerous.—OK,thankyou.【2013扬州】A.don’tB.doesn’tC.won’tD.can’t()2.—______up,Anna.It’sseventhirty.—Onemoreminute,Mum.A.GetB.GetsC.GettingD.Got【2013济南】()3.Doyouwanttobehealthy?__________.Smilingcanhelpyou stayhealthy.A.SmileB.SmilingC.TosmileD.Smiled【2013河南】()4.‘______exerciseeveryday,myson.It’sgoodforyourhealth.’ Dadoftensaidtohim.A.TakesB.TakingC.TakeD.Totake【2013甘肃】()5.Let'sgototheisland,_________?

A.won'tyouB.willyouC.shallweD.willwe【2013黔东南】I.单项选择。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.Not

B.Won't

C.Doesn't

D.

Don't

4._______methetruth,orI'llbeangry.

A.Telling

B.Totell

C.Told

D.TellII.句型转换。1.Willyoupleasereaditagainmoreslowly?(改为祈使句)

_______againmoreslowly,please.

2.Ifyoudon'tlistentome,I'llgo.(改为同义句)

________me,orI'llgo.

3.Theteachersoftentellthestudentsnottobecareless.

(改为祈使句)

________ca