課前準備：檢查學生掌握單詞情況(聽寫)一、形容詞、副詞的比較級和最高級的構成規(guī)則.一般單音節(jié)詞和少數(shù)以-er,-ow結尾的雙音節(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：sma^fsma^erfsma^estshort^shorter^shortesttallftallerftallestgreatfgreaterfgreatest(2)雙音節(jié)詞如：cleverfclevererfcleverestnarrowfnarrowerfnarrowest.以不發(fā)音e結尾的單音節(jié)詞，比較在原級后加-r,最高級在原級后加-st；如：largeflargerflargestnicefnicerfnicestablefablerfablest.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：bigfbiggerfbiggesthotfhotterfhottestfatffatterffattest.以“輔音字母+y”結尾的雙音節(jié)詞，把y改為i,比較級加-er,最高級力口-est；如：easyfeasierfeasiestheavyfheavierfheaviestbusyfbusierfbusiesthappyfhappierfhappiest.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：beautifulfmorebeautifulfmostbeautifuldifferentfmoredifferentfmostdifferenteasilyfmoreeasilyfmosteasily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?！ātisamostimportantproblem.=Itisaveryimportantproblem..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：goodfbetterfbestwellfbetterfbestbadfworsefworstillfworsefworst精選word范本，供參考!oldfolder/elderfoldest/eldestmany/muchfmorefmostlittleflessfleastfarffurther/fartherffurthest/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.精選word范本，供參考!Sheisthan.A.busier/usB.busier/weC.morebusy/usD.morebusy/weJaneisthanBetty.A.lesstallerB.lesstallestC.lesstallD.notastallChinaiscountryintheworld.A.thethirdlargestB.thelargestthirdC.thethirdlargeD.athirdlargest-WhichisseasoninBeijing?-Ithinkit'sautumn.A.goodB.betterC.best D.thebest-Whichis,thesun,themoonortheearth?--Ofcourse,themoonis.A.smallB.smallerC.smallestD.thesmallestTheairinBeijingisgettingmuchnowthanafewyearsago.A.cleanB.cleanerC.cleanestD.thecleanestMobilephonesareverypopularnowandtheyarethanbefore.A.cheapB.cheaperC.cheapestD.thecheapestIstudyEnglishasasmybrother.A.hardB.harderC.hardestWhichis,abicycleoracomputer?A.expensiveB.moreexpensiveC.themostexpensiveTheYellowRiverisoneofriversinChina.AlongBlongerCthelongestSheisthesecondstudentinourclass.A.tallB.tallerC.tallest用括號里的詞的適當形式填空。Tomcanjump(high).Hejumps(high)thantheotherboysinhisclass.Janetsing(well)inherclass.Shecansing(well)thanhermusicteacher,too.Myfatheris(handsome).Butmybrotheris(handsome)thanhim.Heis(handsome)inmyfamily.Ihave(many)booksinmyclass.Butmyteacherhas(many)books精選word范本，供參考!than(I).(they)houseismuch(old)than(we).三、形容詞和副詞比較級的用法.“A+be+形容詞比較級+than+B”意思為“A比B更……”。如：Thistreeistallerthanthatone.這棵樹比那棵樹高。注意：①在含有連詞than的比較級中，前后的比較對象必須是同一范疇，即同類事物之間的比較。②在比較級前面使用much，表示程度程度“強得多”。如：Awatermelonismuchbiggerthananapple.③very,quite一般只能修飾原級，不能修飾比較級。.“比較級+and+比較級”或“moreandmore+原級”表示“越來越……”如：Itbecomeswarmerandwarmerwhenspringcomes.春天來了，天氣變得越來越暖和了。Itisgettingcoolerandcooler.天氣越來越?jīng)鏊?。Thewindbecamemoreandmoreheavily.風變得越來越大。Ourschoolisbecomingmoreandmorebeautiful.我們的學校變得越來越美麗。.在含有or的選擇疑問句中，如果有兩者供選擇，前面的形容詞要用比較級形式。如：Whoistaller,TimorTom?誰更高，Tim還是Tom?.“the+比較級……，the+比較級”，表示“越……越……”。Themoremoneyyoumake,themoreyouspend.錢你賺得越多，花得越多。Thesooner，thebetter.越快越好。.表示倍數(shù)的比較級用法：.Ais…timesthesize/height/length/widthofB.如：Thenewbuildingisthreetimestheheightoftheoldone.這座新樓比那座舊樓高三倍。(新樓是舊樓的四倍高)精選word范本，供參考！.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）.Ais…timeslarger/higher/longer/widerthanB.如：Ourschoolistwicebiggerthanyours.我們學校比你們學校大兩倍。.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。.〃否定詞語+比較級〃，〃否定詞語+so…as〃結構表示最高級含義。Nothingissoeasyasthis.=Nothingiseasierthanthis.=Thisistheeasiestthing..比較級與最高級的轉換：Mikeisthemostintelligentinhisclass.Mikeismoreintelligentthananyotherstudentinhisclass注意：修飾比較級和最高級的詞1）可修飾比較級的詞.abit,alittle,rather,much,far,byfar,many,alot,lots,agreatdeal,any,still,even等。.還可以用表示倍數(shù)的詞或度量名詞作修飾語。.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。（錯）Tomisthetallestofhisthreebrothers.（對）Tomisthetallestofthethreebrothers.2）下列詞可修飾最高級：byfar,far,much,mostly,almostoThishatisnearly/almostthebiggest.注意：a.very可修飾最高級，但位置與much不同。Thisistheverybest.Thisismuchthebest.精選word范本，供參考!b.序數(shù)詞通常只修飾最高級。Africaisthesecondlargestcontinent.選擇題Thisboxisthatone.A.heavythan B.soheavythanC.heavieras D.asheavyasWhenwespeaktopeople,weshouldbe'.A.aspoliteaspossible B.aspoliteaspossiblyC.aspolitelyaspossible D.aspolitelyaspossiblyThisbookisthatone,butthanthatone.asdifficultas;expensiveasmoredifficultas;moreexpensiveasdifficultas;moreexpensivemoredifficultas;asexpensiveIthinkthestoryisnotsoasthatone.A.interesting B.interestedC.moreinteresting D.mostinterestingHisfatherbegantoworkhewassevenyearsold.A.asoldasB.asearlyasC.sinceD.whilethinkscienceis_thanJapanese.A.muchimportant B.importantC.muchmoreimportant D.moremuchimportant.Thispencilisthanthatone.A.longestB.longC.longerD.aslong.Mymotherisnoyoung.A.shorterB.longerC.littleD.few.Thesechildrenarethisyearthantheywerelastyear.A.moretallB.moretallerC.verytallerD.muchtaller10.Itwasveryhotyesterday,butitistoday.A.evenhotterB.morehotterC.muchmorehotD.muchhot四、總結與作業(yè).選擇填空。1.Birdscanfly ,eaglescanfly thanbirds.Th