六年級-比較級與最高級的用法

課前準(zhǔn)備：檢查學(xué)生掌握單詞情況（聽寫）一、形容詞、副詞的比較級和最高級的構(gòu)成規(guī)則1．一般單音節(jié)詞和少數(shù)以-er，-ow結(jié)尾的雙音節(jié)詞，比較級在后面加-er，最高級在后面加-est；（1）單音節(jié)詞如：small→smaller→smallestshort→shorter→shortesttall→taller→tallestgreat→greater→greatest（2）雙音節(jié)詞如：clever→cleverer→cleverestnarrow→narrower→narrowest2．以不發(fā)音e結(jié)尾的單音節(jié)詞，比較在原級后加-r，最高級在原級后加-st；如：large→larger→largestnice→nicer→nicestable→abler→ablest3．在重讀閉音節(jié)（即：輔音＋元音＋輔音）中，先雙寫末尾的輔音字母，比較級加-er，最高級加-est；如：big→bigger→biggesthot→hotter→hottestfat→fatter→fattest4．以“輔音字母＋y”結(jié)尾的雙音節(jié)詞，把y改為i，比較級加-er，最高級加-est；如：easy→easier→easiestheavy→heavier→heaviestbusy→busier→busiesthappy→happier→happiest5．其他雙音節(jié)詞和多音節(jié)詞，比較級在前面加more，最高級在前面加most；如：beautiful→morebeautiful→mostbeautifuldifferent→moredifferent→mostdifferenteasily→moreeasily→mosteasily注意：（1）形容詞最高級前通常必須用定冠詞the，副詞最高級前可不用。例句：TheSaharaisthebiggestdesertintheworld.（2）形容詞most前面沒有the，不表示最高級的含義，只表示"非常"。Itisamostimportantproblem.=Itisaveryimportantproblem.6．有少數(shù)形容詞、副詞的比較級和最高級是不規(guī)則的，必須熟記。如：good→better→bestwell→better→bestbad→worse→worstill→worse→worstold→older/elder→oldest/eldestmany/much→more→mostlittle→less→leastfar→further/farther→furthest/farthest詞形變換。比較級最高級large____________________________________fast____________________________________easy____________________________________wet____________________________________good____________________________________important____________________________________well_____________________________________bad____________________________________many____________________________________little____________________________________far____________________________________strong____________________________________patient____________________________________safe____________________________________expensive____________________________________二、形容詞、副詞的比較級和最高級的句子公式：比較級形容詞物體A+am/are/is+形比+than+物體B.Iamtallerthanyou.Pastaismoredeliciousthanpizza.副詞物體A+行為動詞+副比+than+物體B.Cheetahsrunfasterthangoats.Hestudiesbetterthanme.最高級1）物體A+am/are/is+the+形最高級+比較范圍（of+人/物，in+地方）.Iamthetallestintheclass.Pastaisthemostdeliciousfoodofthethree.2）物體A+行為動詞+副詞最高級+比較范圍（of+人/物，in+地方）.Cheetahsrunfastestintheworld.Hestudiesbestofus.②.Ais…timesasbig/high/long/wide/largeasB.如：AsiaisfourtimesaslargeasEurope.亞洲是歐洲的四倍大。(亞洲比歐洲大三倍)③.Ais…timeslarger/higher/longer/widerthanB.如：Ourschoolistwicebiggerthanyours.我們學(xué)校比你們學(xué)校大兩倍。6.形容詞、副詞的最高級形式主要用來表示三者或三者以上人或事物的比較，表示“最……”的意思。句子中有表示范圍的詞或短語。如：ofthethree,inourclass等等。如：Heisthetallestinourclass.他在我們班里是最高的。7."否定詞語+比較級"，"否定詞語+so…as"結(jié)構(gòu)表示最高級含義。Nothingissoeasyasthis.=Nothingiseasierthanthis.=Thisistheeasiestthing.8.比較級與最高級的轉(zhuǎn)換：Mikeisthemostintelligentinhisclass.Mikeismoreintelligentthananyotherstudentinhisclass注意：修飾比較級和最高級的詞1）可修飾比較級的詞①.abit,alittle,rather,much,far,byfar,many,alot,lots,agreatdeal,any,still,even等。②.還可以用表示倍數(shù)的詞或度量名詞作修飾語。③.以上詞(除byfar)外，必須置于比較級形容詞或副詞的前面。注意：使用最高級要注意將主語包括在比較范圍內(nèi)。(錯(cuò))Tomisthetallestofhisthreebrothers.(對)Tomisthetallestofthethreebrothers.2)下列詞可修飾最高級：byfar,far,much,mostly,almost。Thishatisnearly/almostthebiggest.注意：a.very可修飾最高級，但位置與much不同。Thisistheverybest.Thisismuchthebest.b.序數(shù)詞通常只修飾最高級。Africaisthesecondlargestcontinent.選擇題1.Thisboxis___thatone.

A.heavythanB.soheavythan

C.heavierasD.asheavyas

2.Whenwespeaktopeople,weshouldbe'.

A.aspoliteaspossibleB.aspoliteaspossibly

C.aspolitelyaspossibleD.aspolitelyaspossibly

3.Thisbookis____thatone,but____thanthatone.A.asdifficultas;expensive

B.asmoredifficultas;moreexpensive

C.asdifficultas;moreexpensive

D.moredifficultas;asexpensive

4.Ithinkthestoryisnotso___asthatone.

A.interestingB.interestedC.moreinterestingD.mostinteresting5.Hisfatherbegantowork____hewassevenyearsold.

A.asoldasB.asearlyasC.sinceD.while6.Ithinkscienceis_thanJapanese.

A.muchimportantB.importantC.muchmoreimportantD.moremuchimportant7.Thispencilis___thanthatone.

A.longestB.longC.longerD.aslong

8.Mymotherisno___young.

A.shorterB.longerC.littleD.few

9.Thesechildrenare____thisyearthantheywerelastyear.

A.moretallB.moretallerC.verytallerD.muchtaller

10.Itwasveryhotyesterday,butitis___today.

A.evenhotterB.morehotterC.muchmorehotD.muchhot

四、總結(jié)與作業(yè)1.選擇填空。1.Birdscanfly____________,eaglescanfly____________thanbirds.Theyfly__________intheworld.(high,higher,highest)2.Iam__________thanmybrother,butmylittlesisteristhe__________ofus.(fat,fatter,fattest)3.Whichcanswim_________,fishorsharks?(well,better,best)4.Thegreenbookisa___________book,buttheredoneismuch__________thanthegreenone.It’sthe_________bookinthebookshop.(nice,nicer,nicest)5.Lookatthatboy,heisrunning__________(fast,faster).6.Ithinkthatbookis____________(good,bett