高中英語外研版ALessoninaLabBMGrammar 公開課

Objective

TolearntheuseofDegreesofcomparison1.Basicstructuresofcomparison2.SomeotherstructuresEARTHMARSJUPITERSATURNDiameter(Earth=1)10.51110Numberofmoons121618DistancefromtheSun11.559.5Lookattheinformationinthechartandcheckthesentencesbelow.TheEarthhashalfasmanymoonsasMars.JupiteristentimeslargerthantheEarth.SaturnisnearlyasbigasJupiter.JupiterisfourtimesfurtherfromthesunthantheEarth.SaturnistwentytimesbiggerthanMars.

Thebiggertheplanetis,themoremoonsithas.1.TheEarthhashalfasmanymoonsasMars.

2.

JupiteristentimeslargerthantheEarth.

3.JupiterisfourtimesfurtherfromthesunthantheEarth.

4.SaturnistwentytimesbiggerthanMars.

5.Thebiggertheplanetis,themoremoonsithas.6.Saturnisnearly

asbigasJupiter.Nowpayattentiontothesestatements.Theyareallabouttheuseofdegreesofcomparison.1.Theearthisforty-ninetimeslargerthanthemoon.2.Itislesscoldtodaythanitwasyesterday.3.Therentofourflatisgettingmoreandmore

expensive.Nowreadmoresentencesaboutdegreesofcomparison.4.ThemoreIseeyou,themoreImissyou.5.Thehotter,thebetter.6.Themorehestudies,thebetterhebecomes.7.Theredbuildingistwicetheheightofthegreybuilding.8.Ourschoolisthreetimesthesizeofyours.1.Theearthisforty-ninetimes__________themoon.2.Itis_____coldtoday____itwasyesterday.3.Therentofourflatisgetting_____________________.4._________Iseeyou,_______Imissyou.5.The______,the_____.6.The_____hestudies,the_____hebecomes.7.Theredbuildingis_____theheightofthegreybuilding.8.Ourschoolis___________thesizeofyours.largerthanlessthanmoreandmoreThemorethemorehotterbettermorebettertwicethreetimesexpensive

Ready?1.Thisswimmingpoolistwiceasdeepasthatone.

→Thisswimmingpoolistwice________________

thatone.

2.Ifyouaremorecareful,youwillmakefewermistakes.

→_______________________youare,______________________

youwillmake.句型轉(zhuǎn)換deeperThemorecarefulthefewermistakes

Exercisesthan一般用法

特殊用法倍數(shù)表達(dá)法

形容詞和副詞的比較級一.形容詞和副詞比較等級的用法a.Dickisastallashisbrother.b.Tomspeaksasquicklyashiscousin.c.Ihaveneverseenapersonas/socleverasheis.1.

原級比較：表示兩者程度相同,用“as+形容詞/副詞+as”

結(jié)構(gòu)表示，否定形式為：notas/so+形容詞/副詞+as。2.

比較級：1)表示A超過B。此時(shí)使用形容詞和副詞的比較等級。

Ourclassroomisbrighterthanyours.b.Dogsrunfasterthanrabbits.

Idon’tthinkmathismoreimportantthanphysics.形容詞比較級前還可以用much,far,alot,even,alittle,abit,slightly,still,rather,any…來修飾,說明比較級的程度。very,so,too,quite不能修飾比較級。

1.Comeabitcloser.2.Weneedrather

morethanthat.3.Itweighsalittlemorethanbefore.4.It’llbealotheavierthanmagnesium.5.Isitanyheavier?6.Weneedapiecewhichismuch

biggerthanthat.①Themoonismuchsmallerthan

theearth.②Theresultoftheexperimentturnedouttobeevenbetterthan

expected.③Shehasalotmore

contactwithherEnglishteacherthesedays.④Floridahasaslightly

largerpopulation

thanIllinois(伊利諾斯州).2)表示A不如B，用“l(fā)ess+形容詞/副詞的原級”表示。a.Rabbitsranlessfastthan

dogs.b.Jennyislessclever

thanhersister.c.Itrainslessoftenhereinautumn

thaninspring.1.比較級+and+比較級

越來越……a.Youaregrowingtallerandtaller.

你越長越高了。b.Englishisbecomingmoreandmoreimportant.

英語越來越重要了。二.形容詞和副詞比較級的特殊用法：

a.

Theharderyoupush,themorequickly

thatcartwillmove.

你越使勁推，車就跑的越快。

b.

Themorecarefulyouare,thebetter

youwilldointheexam.

你越仔細(xì)，就會(huì)考得越好。

2.the+比較級+句子其他成分,the+比較級+句子其他成分

越……越……c.

Themoreyoupractice,themorefluently

youwillspeak.

你練得越多，就會(huì)說得更流利。

d.Thecloseryouare,themoreyouwillsee.

你靠得越近，就會(huì)看見越多。e.ThemorebooksIread,themore

informationIlearn.書我讀得越多，就會(huì)獲取更多的信息。a.

Jackisthetallerofthetwobrothers.杰克是兄弟倆中較高的一個(gè)。b.Thisisthebiggerofthetworooms.這個(gè)房間是兩個(gè)中較大的一個(gè)。3.the+比較級+ofthetwo…兩個(gè)……中比較……的一個(gè)a.Hiswholeschooladdeduptonomorethanoneyear.他所接受的學(xué)校教育不過一年。b.Shehasnomorethanoneyuaninherpocket.她兜里只有一塊錢。4.nomorethan:只;不超過;不多于，

相當(dāng)于only。a.Sheisnomoregenerousthanheryoungersister.

b.Sheisnotmoregenerousthanheryoungersister.5.nomore…than:……一樣不……

notmore…than:不如……那樣

相當(dāng)于“notas/so…as”。她和她妹妹一樣吝嗇。

她不如她妹妹那樣慷慨大方。=Sheisnotsogenerousasheryoungersister.a.Heisthreeyearsseniortome.他比我大三歲。b.Yourknowledgeofelectronicsismuchsuperiortomine.你對電子學(xué)的知識(shí)遠(yuǎn)遠(yuǎn)超過我。7.不用比較級的形容詞，如：senior,junior,superior,inferior。a.Thistreeisthreetimesas

tall

asthatone.

這棵樹是那棵樹的三倍高。b.Hisfatheristwiceas

old

ashe.

他父親的年紀(jì)有他兩倍大。c.Thebigboxisfourtimesasheavy

asthesmallone.大箱子是小箱子的四倍重。1)A+be+倍數(shù)+as+形容詞原級+as+B

三.形容詞和副詞比較級的倍數(shù)表達(dá)法：

TheYangtzeRiverisalmosttwicelongerthanthePearlRiver.

長江差不多比珠江長一倍。(長度是兩倍)

b.Thedictionaryisexactlyfivetimesmoreexpensivethanthatone.這本字典比那本恰好貴四倍。(價(jià)格是五倍)(2)A+be+倍數(shù)+形容詞比較級+than+Ba.Thenewlybroadenedsquareisfourtimesthesizeofthepreviousone.

新擴(kuò)建的廣場是未擴(kuò)建時(shí)的四倍大。b.Thisstreetistwicethewidthofthatone.

這條街是那條街的兩倍。

(3)A+be+倍數(shù)+the+計(jì)量名詞+of+B

注意事項(xiàng)：

要避免重復(fù)使用比較級。

Heismoreclevererthanhisbrother.Heismorecleverthanhisbrother.Heisclevererthanhisbrother.

要避免將主語含在比較對象中。

ChinaislargerthananycountryinAsia.ChinaislargerthananyothercountryinAsia.要注意對應(yīng)句型，遵循前后一致的原則。

a.

ThepopulationofShanghaiislargerthanthatofBeijing.b.Itiseasiertomakeaplanthan

tocarryitout.注意事項(xiàng)：要注意冠詞的使用，后有名詞的時(shí)候，前面才有可能有冠詞。比較：a.Whichislarger,CanadaorAustralia?b.Whichisthelargercountry,CanadaorAustralia?c.Sheistallerthanhertwosisters.d.Sheisthetallerofthetwosisters.注意事項(xiàng)：Makesentencesaboutthecomparativesizesofthepairs.Usethewordsinthebrackets.Example:1.SonghuaRiver:2,309kilometresYangtzeRiver:6,300kilometres(long)

IthinktheYangtzeRiverisabout3timesaslongastheSonghuaRiver.Orwecansay:

IthinktheYangtzeRiverisaboutthreetimeslongerthan/thelengthoftheSonghuaRiver.P43

2Practice2.winterinBeijing:-5℃winterinHarbin:-20℃(cold)____________________________________________________________________________________________________________________________________________________3.MountTai:1,521metresMountQomolangma:8,844metres(high)____________________________________________________________________________________________________________________________________________________WinterinHarbinisfourtimescolderthaninBeijing.WinterinHarbinisfourtimesascoldasinBeijing.MountQumolangmaisaboutsixtimeshigherthanMountTai.MountQumolangmaisaboutsixtimesashighas/theheightofMountTai.4.myhouse:80squaremetresmyaunt’shouse:160squaremetres(large)________________________________________________________________________________________________________________________________________________________5.Lilyweighs:45kilogramsTomweighs:over90kilograms(heavy)____________________________________________________________________________Myaunt’shouseistwiceaslargeasmyhouse.Myaunt’shouseistwicelargerthan/thesizeofmyhouse.TomweighsovertwiceasheavyasLily.TomweighsovertwiceheavierthanLily.(weight)P47

2Usethewordsbelowtowritesentencesasintheexample.Example:temperature/get/lowThetemperatureis

gettinglowerandlower.1.hotmetal/get/big_____________________________________2.magnesium/get/hot_____________________________________3.sun/get/strongduringthemorning_____________________________________4.sea/become/warm____________________________________Thehotmetalisgettingbiggerandbigger.Themagnesiumisgettinghotterandhotter.Thesunisgettingstrongerandstrongerduringthemorning.Theseaisbecomingwarmerandwarmer.1.期末考試總是比較難。

2.閱讀比烹飪有趣。3.外語跟計(jì)算機(jī)科學(xué)一樣實(shí)用。4.你學(xué)得越多，你越是想學(xué)。5.多多益善。

6.亨利的書沒有我的那么多。Translation.Thefinalexamisalwaysmoredifficult.Readingismoreinterestingthancooking.Foreignlanguagesareaspracticalas

computerscience.Themoreyoulearn,themoreyouwishtolearn.Themore,thebetter.Henrydoesn’thavesomanybooksasIhave.①比較級+and+比較級②the+比較級+……,the+比較級+……③the+比較級+ofthetwo…④nomorethan⑤nomore…thannotmore…than

原級比較:①as+adj./adv.+as②notas/so+adj./adv.+as比較級:①形容詞/副詞比較級+than②less+形容詞/副詞原級+than一般用法

特殊用法倍數(shù)表達(dá)法

形容詞和副詞的比較級Review①A+be+倍數(shù)+as+形容詞原級+as+B②A+be+倍數(shù)+形容詞比較級+than+B③A+be+倍數(shù)+the+計(jì)量名詞+of+BSelf-evaluationHaveyougottheusagesofDegreesofcomparison?I.Completethesentences.1.這個(gè)新建的學(xué)校是那個(gè)舊學(xué)校的三倍大。

Thenewlybuiltschoolis____________________theoldone.2.手機(jī)現(xiàn)在很受歡迎，它們比以前便宜。

Mobilephonesareverypopularnowandtheyare__________________.3.在新的學(xué)校里，海倫變得越來越開心了。

Inthenewschool,Helenisbecoming__________________.4.露西越來越瘦了。她是如何成功減肥的？

Lucyis__________________.Howdidshemanagetoloseweight?5.鮑勃已經(jīng)學(xué)了和他哥哥一樣多的英語單詞。Bobhaslearned______________________hisbrother.threetimesasbigas/threetimesbiggerthan/threetimesthesizeofcheaperthanbeforehappierandhappierthinnerandthinnerasmanyEnglishwordsas6.這個(gè)杯子里的水是那個(gè)杯子里的水的兩倍。

Thewaterinthiscupis__________________thatinthatone.7.技術(shù)正在讓我們的生活變得越來越容易。

Technologyismakingourlifebecome__________________.8.買一所我自己的房子對我來說越來越難了。

Itis_____________________formetobuyahouseofmyown.9.這部電影不如那部有趣。Thisfilmis_____________________thatone.10.他的身體狀況一天天好起來。

Heisgetting__________________every