牛津译林八年级英语上册unit-4-Do-it-yourself-课件(共42张PPT)

Unit4DoityourselfGrammarAGivinginstructionsPutupapictureonthewall.Putupashelfonthewall.Westartasentencewiththebaseformofaverbwhenwewanttotellpeoplewhattodo.Don’tswimhere.Don’tparkyourbikehere.Weadd‘don’t’infrontoftheverbwhenwewanttotellpeoplenottodosomething.1.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用动词原形。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！③Let型（以let开头），例如：

Let

me

try.让我试试看。

Let’s

look

at

the

map.让我们看看地图。●let’s是let

us的简略式。●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。

2)祈使句的否定结构，一律在肯定结构前加

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。Parkyourbikehere.Pleasegoslowly.MoreinstructionsDon’tsmokehere.Don’tfishhere.MoreinstructionsBequiet,please.Don’tmakeanynoise.MoreinstructionsMillieisteachingherclassmateshowtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstruction.Howtomakecards_____outpiecesofcardwithapairofscissors.Cut

cutdrawgivekeeplooktrywrite_____somewordsorasentenceoneachcard.Write

cutdrawgivekeeplooktrywrite_____apictureaboutthewordsorsentenceontheothersideofthecard.Draw

cutdrawgivekeeplooktrywrite_____atthepictureand___torememberwhatisontheotherside.Looktry

cutdrawgivekeeplooktrywritePlease_________(not)up.____trying,andyouwillfindyoucanrememberthingsbetter.

don’tgiveKeep

cutdrawgivekeeplooktrywrite1.剪出……2.写一些话或一个句子3.在每张卡上4.在卡的另一面5.尝试做某事6.记住某事7.放弃8.放弃某事/做某事9.坚持尝试10.把事情记得更好cutout…writesomewordsorasentenceoneachsideontheothersideofthecardtrytodosth.remembersth.giveupgiveupsth./doingsth.keeptryingrememberthingsbetterUsefulExpressionsGrammarBshould&hadbetter1.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.当我们给他人提建议时，可以用hadbetter和should，表示“最好”或“应该”做某事，hadbetter的语气比should强一些。Yourwatchisbroken.Youhadbetterbuyanewone.你的手表坏了，你最好买个新的。Youshouldexercisemore.你应该多锻炼。hadbetter(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。Youhadbetternotbelateforschool.你最好不要上学迟到。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’tputsomanybooksontheshelf.你不应该在架子上放如此多的书。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.当我们向他人发出命令、提出要求或建议时，常使用祈使句。其主语通常不明确表示出来。其否定形式是在动词原形前加donot/don’t。为了表示客气和礼貌，可以加上please。2.当我们给他人提建议时，可以用hadbetter和should，表示“最好”或“应该”做某事。否定形式是hadbetternot和

shouldnot/shouldn’t。ReflectionI.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'tlist