滬教版深圳市八年級上冊英語Unit3Computers第3課時(shí)課件葉碧潔

Period3

GrammarModule2ScienceandtechnologyOxfordEnglishUnit

3ComputersWillcomputersmakeourlivesbetter?Revisionandintroduction1

Completethearticle.Thefirstcomputerswere_________thancars,butnowtheyarebecoming________and_________.

Computerscancalculateata_________speedthanwecan.Computersarenot_________thanhumanbeings,buttheymaybeabletodoa_________jobthanus.Inthepast,computerswere_______expensive,butnowtheyaremuch________.cheaperclevererfastersmallerbiggermoreGrammarAThecomparativeofadjectives2Whenwe

compare

twopeopleorthings,wecanusethecomparativeof

adjectives.betterbetterHowdoweformthecomparativeofadjectives?-ermorethanThefirstcomputerswere_________thancars,butnowtheyarebecoming________and_________.

Computerscancalculateata_________speedthanwecan.Computersarenot_________thanhumanbeings,buttheymaybeabletodoa_________jobthanus.Inthepast,computerswere_______expensive,butnowtheyaremuch________.cheaperclevererfastersmallerbiggermorebetterbetterthecomparativeofadjectives

比較級形式例詞單音節(jié)形容詞大多數(shù)單音節(jié)形容詞+-erhigh→highersmall→smaller以-e結(jié)尾+-rlarge→largerwide→wider一個(gè)元音+一個(gè)輔音雙寫輔音字母，再加-erbig→biggerhot→hotter雙音節(jié)形容詞以-y或-ly結(jié)尾去掉y，再加-ierhappy→happiersilly→sillier以非重讀元音、/l/或/R(r)/結(jié)尾+-er(-r)clever→cleverersimple→simpler以-ful，-less，-ed，-ing結(jié)尾more+形容詞原級careful→morecarefulboring→moreboring多音節(jié)形容詞含三個(gè)或三個(gè)以上音節(jié)more+形容詞原級difficult→moredifficultpopular→morepopularmore

expensivelighterCompletetheconversationbelowandonpage40withthecomparativeoftheadjectivesfromthebox.heaviersmallerbigger

S1:______________________,CanadaorChina?(country/big)S2:______________________________.Which

country

is

biggerCanada

isbiggerthanChinaAskandanswerquestionsusingthefollowinginformation.Thefirstonehasbeendoneforyou.(country/big)CanadaChinaHongKongShanghaitheYellowRivertheYangtzeRiverHainanIslandTaiwanIslandMountainTaiYellowMountain(city/big)(river/long)(island/large)(mountain/high)S1:_______________________,CanandaorChina?(country/big)S2:_________________________.WhichcountryisbiggerCanadaisbiggerthanChinaAskandanswerquestionsusingthefollowinginformation.Thefirstonehasbeendoneforyou.Theredlaptopisthesmallestamong/ofthethree.Whenwecomparemorethantwopeopleorthings,weusethesuperlativeofadjectives.GrammarBThesuperlativeofadjectives3￥6,000￥4,600￥7,500Theredlaptopis

thesmallestamong/ofthethree,butitis___________________.themostexpensiveHowdoweformthesuperlativeofadjectives?-estmostthethesuperlativeofadjectives最高級形式例詞單音節(jié)形容詞大多數(shù)單音節(jié)形容詞+-esthigh→highestsmall→smallest以-e結(jié)尾+-stlarge→largestwide→widest一個(gè)元音+一個(gè)輔音雙寫輔音字母，再加-estbig→biggesthot→hottest雙音節(jié)形容詞以-y或-ly結(jié)尾去掉y，再加-iesthappy→happiestsilly→silliest以非重讀元音、/l/或/R(r)/結(jié)尾+-est(-st)clever→cleverestsimple→simplest以-ful，-less，-ed，-ing結(jié)尾most+形容詞原級careful→mostcarefulboring→mostboring多音節(jié)形容詞含三個(gè)或三個(gè)以上音節(jié)most+形容詞原級difficult→mostdifficultpopular→mostpopularDavid:I’dliketoseesomeofyourcameras.Salesman:Certainly.Thisisthemostexpensivemodel.Thisisthecheapestmodel.Thisisthenewestandlightestmodel.abcB1Davidisshoppingforacamera.Lookatthephotosandwritetheletterofthecorrectmodelaftereachstatement.(1)________(2)________(3)________Tony:Didtheyshowyouanycameras?David:Yes.The(1)______________modelis(2)____________________________.The(3)_______________modelcosts(4)_____________.The(5)_______________modelwasmadein(6)_______.The(7)_________modelweighs(8)______________.expensivelightoldsmallsmallest99.8mmx56.4mmx24.5mmmostexpensiveoldestlightest￥3,5892010170gB2DavidtoldhisfriendTonyabouthisshoppingtrip.CompleteDavid’ssentenceswiththesuperlativeoftheadjectivesfromthebox.S1:Whichisthebiggest,theEarth,theMoonortheSun?S2:TheSunisthebiggest.theEarth,theMoonortheSun?(big)abee,abutterflyoranant?(small)iron,silverorgold?(valuable)abear,awhaleoranelephant?(heavy)aspaceship,aplaneoratrain?(fast)Askandanswerquestionsusingthefollowinginformation.Thefirstonehasbeendoneforyou.HHomework熟記形容詞的比較級和最高級的構(gòu)成方式。

以下各組事物中，你最喜歡或討厭哪一個(gè)？請運(yùn)用所給的含形容詞的比較級和最高級的句型陳述理由。