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Unit7What’sthehighestmountainintheworld?GrammarFocusWhat'sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It'

s8,844.43metershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.Didyouk

nowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It'smucholderthantheUS.4a.Fillintheblankswiththecorrectformsofthewords

inthebox.1.TheAmazonRiverisoneofthe_________riversintheworld.It’salittle________thantheYangtzeRiver.2.Qomolangmais8,844.

43meters_______.bigmuchpopularlongoldhighlongestlongerhighIt’soneofthemost__________placesforseriousmountainclimbers.3.Nooceanintheworldisas___

_____asthePacificOcean.4.AlthoughJapanis__________thanCanada,itis_________smaller.popularbigoldermuche.g.Tworivers

：_________________and______________________________________________________________________________________________

__________________________________________________4b.Writetwocomparisonsabouttwotopics.Writetruefacts.theYangt

zeRivertheAmazonRiverTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeisthelongestriverinChina.

Twocities：__________and__________1.______________________________________2._______________________________

____________________________________________Twoanimals：__________and__________1.______________________________________2._____

______________________________________________________________________4c.Writefivequestionsusingcomparisons.Thenasky

ourpartneryourquestions.1.____________________________________2.____________________________________3.__________________________

__________4.____________________________________5.____________________________________Whatisthehighestbuildinginourcity?Whoisth

eoldestpeopleinourcity?Whatisthemostpopularstreetinourcity?Whatisthemostdeliciousfoodinourcity?Whereisthebusiestroadinourcit

y?练一练3451001657,421threehundredandforty-fiveonethousand(and)onesixhundredandfifty-seventhousand,fourhundredandtwenty-one多位基数词读法4

57890608389threehundredandeighty-ninefourhundredandfifty-seveneighthundredandninetysixhundredandeight1）10

1~999的三位数由“百位数＋and+两位数组成”。如：325—threehundredandtwenty-five102onehundredandtwo635sixhundredandthirty-five表示不确切数目时，这类词后加-s且与of连用。如：hundreds

ofpeoplethousandsofstudentsmillionsofbirdsbillionsoflions注意：这类短语中，名词前如有定冠词、指示代词或形容词性物主代词时，可加of,但表示的是范围。如：twohundredoftheworkers工人中的二百（人）sh

ort-shortersmallnicenicersafesafer-----heavyheavierhappierbigbiggerthinthinnerdelicious–moredeliciousinteresting–moreinterestinghappy-smaller-2.构成

的规则变化:1)单音节词和少数双音节词一般在词尾后加-er构成比较级或-est构成最高级.如：原级比较级最高级cold–——colder–——coldestbright———brighter———bri

ghtestyoung——younger——youngest2)以字母e结尾的词只加–r或-st构成比较级和最高级。原级比较级最高级nice———nicer–———nicestfine———finer————finestlarge——larger————largest3)重读闭音节词末尾

只有一个辅音字母时,先双写这个辅音字母,再加-er或-est。如:big–bigger–biggestthin–thinner–thinnest4)以“辅音字母+y”结尾的双音节词，先改y为i,再加-er或-est。如：easy–easier–e

asiesthappy–happier–happiest构成的不规则变化:(一好一坏一多一少一远一老)e.g.good/well–better–bestbad/badly–worse–worstmany/much–more–

mostlittle–less–leastfar–farther/further–farthest/furthestold–older/elder–oldest/eldest最高级规则变化口诀：最高级，很容易，一般词尾加est。(cheap-theche

apest)词尾若有哑音e,直接就加st。(close-theclosest)重读闭音节,单辅音字母要双写。(big-thebiggest)辅音字母加y,记得把y变为i。(friendly-thefriendliest)多音节，考考你，them

ost到底加哪里？(popular-themostpopular)TheComparativeSuperlativeDegreesofAdjectives&Adverbs总结形容词和副词比较级和最高级latelater-latestearlyea

rlier–earliestbigbigger-biggestfluently/difficultmore～,most～重读闭音节、末尾只有一个辅音字母双写加–er或–est单音节词在词尾比较级加-er或最高级加-est以e结尾的词，只需加－r或－st以辅音字母加y结尾双音节词变y为i加

–er或–est部分双音节和多音节词在原级前加more或most少数以er,ow结尾的双音节词加-er-esttalltaller-tallestclevercleverer-cleverestcheap,col

d,small,warm,young,highfine,nice,safehappy,busy,dirty,easy,lazy,prettyfat,hot,red,thin,wet,sadnarrow,yellowquickly,slowly,useful,careful,popu

lar,modern,形容词和副词比较级和最高级构成(规则变化)形容词和副词比较级的用法1.Whorunsfaster,heorshe?2.Herunsfasterthanshe.3.Herunsmuchfastertha

nshe.4.Hebecomeshealthierandhealthier.5.Themoreyouexercise,thehealthieryouwillbe.6.Sheislesshealthythanhe.1.表示两者之间的选择,可用“Which/

Who…+比较，…or…?”.2.表示两者之间的比较，通常用连词than引导，表示“更······一些”．3.much/far/alot,even,still,alittle/abit…修饰比较级,表示程度.Whorunsfaster,heorshe?Herunsf

asterthanshe.Herunsmuchfasterthanshe.4.“比较级+and+比较级”表示“越来越……”5.“the+比较级,the+比较级”表示“越…,越…”6.表示不及另一方时，用“less+原级+than…”(双音节和多音节词)Heb

ecomeshealthierandhealthier.Themoreyouexercise,thehealthieryouwillbe.Sheislesshealthythanhe.Heishealthierth

anshe.Shanghaiisbecomingmoreandmoremodern.1.比较级+and+比较级越来越…2.the+比较级,the+比较级越…,越…3._______________youare,_________mistakesyouwillmake.(你越

仔细，做错的题目就越少）4.__________youeat,_________you’llbe.(你吃得越多,就越胖)5.Alicewriteswell.Marywrites_________________thanshe.(

甚至更好）ThemorecarefulthefewerThemorethefatter1.Thegirlbecomes______________________.(越来越漂亮）moreandmorebeautiful2.Theweathe

risgetting_________________.(越来越槽糕）worseandworseeven/stillbetter1.表示三者或三者以上比较,可用”Which/Who…+最高级,…,…or…?”表示.2.最高级+of/among(同类比较

)in…(范围比较)4.oneof+形容词最高级+名词复数表示“最…之一”3.序数词修饰最高级形容词和副词的最高级的用法Whoisthetallest,Tom,Mike,orJack?Tomisthe

tallestofthethree.Mikeisthesecondtalleststudentinourclass.Jackisoneofthetalleststudentsinourclass.Tomruns(the)fastestinourclass.3.LinTaois_______

___________________intheclassbecausehenevergetstoschoolontime.（最懒的学生之一）4.Edisonwas_________________________intheworld.(最伟大的发明家之一）oneof

thelazieststudentsoneofthegreatestinventors1.TheYangtzeRiveris__________________riverintheworld.(第三长河）thethirdlongest2.TheAtlanticis________

__________oceanintheworld.(第二大洋）thesecondbiggestExercise:一、翻译句子：二、同义句转换1.FlatAismoreexpensivethanFlatBFlatBis_______________than

FlatA.FlatBis_______________FlatA.FlatBisnot_________________FlatA.2.IprefermathstoEnglish.Ilikemaths__________________English.bettert

han3.Heisthetalleststudentintheclass.Heis______________________________intheclass.tallerthananyotherstudentanyother+名词单数lessexpensivecheaperthana

sexpensiveasHomeworkPracticewithyourclassmatestospeakandwritelargenumbers.Writesomenumbercarsandpu

ttheminyourroom.Wheneveryousee,readthemquickly.