牛津譯林版八年級英語上冊Unit4DoityourselfGrammar讀一讀下面的幾則英文標語，你有什么發現？Howtomakesentencesinapoliterway?

houldSometimesorderingothersisnotawisechoicebutgivingadviceinapolitewayisthebest!

Wecanchangethestrongword“must”into“s______”.IfathingisworthdoingitisworthworthdoingwellYouhadbetterputthebeerinthefridgebeforedrinkingit.喝啤酒前你最好先把它放在冰箱里。Youshouldexercisemore.你應該多鍛煉。Youhadbetternotmissthelastbus.你最好不要錯過末班公共汽車Youshouldn’tdrinkanddrive.你不應該喝酒后開車LookandsayIfathingisworthdoingitisworthworthdoingwellYoushould/hadbetter…Help!I

knowlittleaboutDIY.WhatshouldIdo?Inordertolearnmoreaboutit,youhadbetter____________aboutDIY.readmorebooksIfathingisworthdoingitisworthworthdoingwellGrammarA.GivinginstructionsWestartasentencewiththebaseformofaverbwhenwewanttotellpeoplewhattodo.Putupapictureonthewall.Paintthewallsblue.Weadddonot/don’tinfrontofaverbwhenwewanttotellpeoplenottodosomething.Ifathingisworthdoingitisworthworthdoingwell當我們給他人提建議時，可以用hadbetter和should，表示“最好”或“應該”做某事，hadbetter的語氣比should強一些。YoushouldknowalittleaboutDIY.Youshouldnotputsomanybooksontheshelf.Yourwatchisbroken.Youhadbetterbuyanewone.Youhadbetternotbelateforschool.IfathingisworthdoingitisworthworthdoingwellDon’tpaintthecat.Weoftenaddpleaseinasentencetomakeaninstructionmorepolite.Pleasefixtheshelfforme.Don’ttouchthewetpaint,please.Ifathingisworthdoingitisworthworthdoingwell1.(1)__________outpiecesofcardwithapairofscissors.2.(2)__________somewordsorasentenceoneachcard.3.(3)__________apictureaboutthewordsorsentenceontheothersideofthecard.Cutcut①

draw

give

keep

look

try

writeWriteDraw溫馨提示：此符號表示“考點精講點撥”鏈接。Ifathingisworthdoingitisworthworthdoingwellhad

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.shoulddosthshouldnotdosthYoushouldbequietlyinclass.Youshouldnotbelateforschool.IfathingisworthdoingitisworthworthdoingwellHowtomakecardsMillieisteachingherclassmateshowtomakecardstohelpthemrememberthingsbetter.LookatthepicturesandhelpMilliecompletetheinstructions.Ifathingisworthdoingitisworthworthdoingwellcut/k?t/vt.剪下，切下，割下e.g.Cutupthemeat.把肉切碎。Don’tcutthemdown.別把它們砍倒。考點1cut-cut-cut知識點1cutIfathingisworthdoingitisworthworthdoingwell(4)__________atthepictureand(5)__________tosaywhatisontheotherside.Please(6)__________(not)up.②

(7)__________tryingandyouwillfindyoucanrememberthingsbetter.cut

draw

give

keep

look

try

writeLooktrydon'tgiveKeepIfathingisworthdoingitisworthworthdoingwellTIPThemodalverbsshouldandhadbetterdonotchangetheirforms.DIYadviceSuzyisgivingDIYadvicetoherclassmates.Readtheadvicebelow.HelpSuzymakesentenceswithshould(not)orhadbetter(not)Ifathingisworthdoingitisworthworthdoingwell1.Youshould/hadbetterbuysometolearnmoreaboutit.2.Youshould/hadbetterjoinaDIYclubtolearnmoreaboutit.3.Youshould/hadbetternotbeginyourworkwithoutreadingthem.4.Youshould/hadbetternotplaywiththemwhenyoudoDIYjobs.5.Youshould/hadbetterbepatient.Ifathingisworthdoingitisworthworthdoingwellcut的常用搭配cutout刪除cutdown砍倒；減少cutup切碎cutoff切掉；中斷IfathingisworthdoingitisworthworthdoingwellOurschooliscreatingaNationalCivilizedSchool(創文明校園)now.Couldyougiveussomeadviceindifferentplaces?Ifathingisworthdoingitisworthworthdoingwell1)should的用法(沒有人稱和數的變化)①肯定式：shoulddosth!

Youshould

knowalittleaboutDIY.②否定式：shouldn’tdosth!Youshouldnot

putsomanybooksontheshelf.2)hadbetter的用法(沒有人稱和數的變化)①肯定式：hadbetterdosth!

Yourwatchisbroken.Youhadbetter

buyanewone.②否定式：hadbetternotdosth!Youhadbetternotbelateforschool.

’dbetter是hadbetter的簡略式。Ifathingisworthdoingitisworthworthdoingwellshould&hadbetterIfathingisworthdoingitisworthworthdoingwellDIYadviceIfathingisworthdoingitisworthworthdoingwellDIYadviceSuzyisgivingDIYadvicetoherclassmates.Readtheadvicebelow.HelpSuzymakesentenceswithshould(not)orhadbetter(not).IfathingisworthdoingitisworthworthdoingwellAdviceshould/shouldn'thadbetter(not)...Ifathingisworthdoingitisworthworthdoingwell

a

beginyourworkwithoutreadingthem

b

joinaDIYclubtolearnmoreaboutitcbepatient

dbuysometolearnmoreaboutit

eplaywiththemwhenyoudoDIYjobsTherearemanyusefulbooksaboutDIY.Youshould/hadbetterbuysometolearnmoreaboutit.Ifathingisworthdoingitisworthworthdoingwell

PartA:learnhowtogiveinstructions

(Please)+dosth.(Please)+Don’t/

dosth.PartB:learnhowtogiveadvice

肯定：should/hadbetter+V原

否定：shouldnot/hadbetternot+V原肯定：否定：SummaryIfathingisworthdoingitisworthworthdoingwellActivity11.Youhavelostyourwalletonthebus.2.Youarelostinthemiddleofthecapitalcity.3.Istayatmyclassmate’shome,butmyparentsdon’tknow.4.Weareinthelibrary.IfathingisworthdoingitisworthworthdoingwellDIYisnoteasy.You

should/hadbetterjoin