1、學習必備歡迎下載課前準備：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則1.一般單音節詞和少數以-er,-ow結尾的雙音節詞，比較級在后面加-er,最高級在后面加-est；(1)單音節詞如：smallfsmallerfsmallestshortfshorterfshortesttall一taller一tallestgreat一greater一greatest(2)雙音節詞如：cleverfclevererfcleverestnarrowfnarrowerfnarrowest2 .以不發音e結尾的單音節詞，比較在原級后加-r,最高級在原級后加-st;如：largeflar

2、gerflargestnicefnicerfnicestablefablerfablest3 .在重讀閉音節(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：bigfbiggerfbiggesthotfhotterfhottestfatffatterffattest4 .以“輔音字母+y”結尾的雙音節詞，把y改為i,比較級加-er,最高級加-est；如：easyfeasierfeasiestheavyfheavierfheaviestbusyfbusierfbusiesthappyfhappierfhappiest5 .其他雙音節詞和多音節詞，比較級在前面

3、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。例旬：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 .有少數形容

4、詞、副詞的比較級和最高級是不規則的，必須熟記。如：good-betterfbestwellfbetterfbestbadfworsefworstillfworsefworst學習必備歡迎下載oldfolder/elderfoldest/eldestmany/muc*morefmosthttleTessleastfarffurther/fartherffurthest/farthest詞形變換。比較級最高級largefasteasywetgoodimportantwellbadmanylittlefarstrongpatientsafeexpensive二、形容詞、副詞的比較級和最高級的句子公式

5、：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）.Che

6、etahsrunfastestintheworld.Hestudiesbestofus.學習必備歡迎下載1. Sheisthan.A.busier/usB.busier/weC.morebusy/usD.morebusy/we2. JaneisthanBetty.A.lesstallerB.lesstallestC.lesstallD.notastall3. Chinaiscountryintheworld.A.thethirdlargestB.thelargestthirdC.thethirdlargeD.athirdlargest4. -WhichisseasoninBeijing?-It

7、hinkit'sautumn.A.goodB.betterC.bestD.thebest5. -Whichis,thesun,themoonortheearth?-Ofcourse,themoonis.A.smallB.smallerC.smallestD.thesmallest6. TheairinBeijingisgettingmuchnowthanafewyearsago.A.cleanB.cleanerC.cleanestD.thecleanest7. Mobilephonesareverypopularnowandtheyarethanbefore.A.cheapB.chea

8、perC.cheapestD.thecheapest8. IstudyEnglishasasmybrother.A.hardB.harderC.hardest9. Whichis,abicycleoracomputer?A.expensiveB.moreexpensiveC.themostexpensive10. TheYellowRiverisoneofriversinChina.AlongBlongerCthelongest11. Sheisthesecondstudentinourclass.A.tallB.tallerC.tallest用括號里的詞的適當形式填空。1. Tomcanju

9、mp(high).Hejumps(high)thantheotherboysinhisclass.2. Janetsing(well)inherclass.Shecansing(well)thanhermusicteacher,too.3. Myfatheris(handsome).Butmybrotheris(handsome)thanhim.Heis(handsome)inmyfamily.4. Ihave(many)booksinmyclass.Butmyteacherhas(many)books學習必備歡迎下載than(I).5. (they)houseismuch(old)than(

10、we).三、形容詞和副詞比較級的用法1 .“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：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。在比較級前面使用much,表示程度程度“強得多”。如：Awatermelonismuchbiggerthananapple.very,quite一般只能修飾原級，不能修飾比較級。2 .“比較級+and+比較級”或“moreandmore+原級”表示“越來越”如：Itbecomeswarmerandwarmerwhenspringcom

11、es.春天來了，天氣變得越來越暖和了。Itisgettingcoolerandcooler.天氣越來越涼爽。Thewindbecamemoreandmoreheavily.風變得越來越大。Ourschoolisbecomingmoreandmorebeautiful.我們的學校變得越來越美麗。3 .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?4 .“the+比較級,the+比較級”，表示“越越”。Themoremoneyyoumake,themoreyouspend.錢你賺得越多，花得越多。Th

12、esooner,thebetter.越快越好。5 .表示倍數的比較級用法： .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)學習必備歡迎下載 .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） .Aistimeslarger/higher/longer/widerthanB.如：Ou

13、rschoolistwicebiggerthanyours.我們學校比你們學校大兩倍。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+soas"結構表示最高級含義。Nothingissoeasyasthis.=Nothingiseasierthanthis.=Thisistheeasiestthing.8 .比較級與最高

14、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）Tomisthetallestofhisthreebr

15、others.（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.學習必備歡迎下載b.序數詞通常只修飾最高級Africaisthesecondlargestcontinent.選擇題1. Thisboxisthatone.A.heavythanB.soheavythanC.heavierasD.ashe

16、avyas2. Whenwespeaktopeople,weshouldbe'.A.aspoliteaspossibleB.aspoliteaspossiblyC.aspolitelyaspossibleD.aspolitelyaspossibly3. Thisbookisthatone,butthanthatone.A. asdifficultas;expensiveB. asmoredifficultas;moreexpensiveC. asdifficultas;moreexpensiveD. moredifficultas;asexpensive4. Ithinkthestor

17、yisnotsoasthatone.A.interestingB.interestedC.moreinterestingD.mostinteresting5. Hisfatherbegantoworkhewassevenyearsold.A.asoldasB.asearlyasC.sinceD.while6.1 thinkscienceis_thanJapanese.A.muchimportantB.importantC.muchmoreimportantD.moremuchimportant7 .Thispencilisthanthatone.A.longestB.longC.longerD

18、.aslong8 .Mymotherisnoyoung.A.shorterB.longerC.littleD.few9 .Thesechildrenarethisyearthantheywerelastyear.A.moretallB.moretallerC.verytallerD.muchtaller10.1 twasveryhotyesterday,butitistoday.A.evenhotterB.morehotterC.muchmorehotD.muchhot四、總結與作業1 .選擇填空。1.Birdscanfly,eaglescanflythanbirds.Theyflyintheworld.(high,higher,highest)2. Iamthanmybrother,butmylittlesisteristheofus.(fat,fatter,fattest)3. Whichcanswim,fishorsharks?(well,better,best)學習必備歡迎下載4. Thegreenbookisabook,buttheredoneismuchthanthegreenone.It'sthebookinthebookshop.(nice,nicer,nicest)5. Lookatthatboy,heisrunn