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1、Unit7What’sthehighestmountainintheworld?SectionAGrammarFocusGrammarFocusWhat'sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It's8,844.43metershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.Did
2、youknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It'smucholderthantheUS.确切数目与不确切数目的表达：表示确切数目时，用单数，后直接接复数名词；如：threehundredbooksonehundredpeoplefivethousandstudentssevenmillionstars表示确定数量时用基数词+hundred，thousand，million，billion表示不确切数目时，这类词后加-s且与of连用，表示“几百”“几千”“几百万”“
3、几十亿”如：hundredsofpeoplethousandsofstudentsmillionsofbirdsbillionsoflions注意：1.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：twohundred//oftheworkers工人中的二百（人）2.切记基数词不与+s或of连用()____peopleintheworldaresendingandreceivinge-mailseveryday. A.MillionofB.ManymillionsofC.Severalmillion
4、ofD.Severalmillions()_______treeswereplantedonthemountainlastyear.A.ThousandsofB.ThousandofC.FivethousandofD.FivethousandsGrammarFocus形容词的原级，比较级和最高级原级：as+adj/adv原+as和…一样否定：notso/as+adj/adv原+as不和…….一样Heisastallasme.否：Heisnotastallasme.latelater-latestearlyearlier–earliestbig
5、bigger-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,cold,small,warm,young,highfine,nice,safehapp
6、y,busy,dirty,easy,lazy,prettyfat,hot,red,thin,wet,sadnarrow,yellowquickly,slowly,useful,careful,popular,modern,形容词和副词比较级和最高级构成(规则变化)3.不规则变化：原级比较级最高级good/wellbetterbestbad/illworseworstlittlelessleastmany/muchmoremostfarfarther/furtherfarthest/furthestoldolder/elderoldest/el
7、dest形容词和副词比较级的用法1.Whorunsfaster,heorshe?2.Herunsfasterthanshe.3.Herunsmuchfasterthanshe.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/
8、alot,even,still,alittle/abit…修饰比较级,表示程度.Whorunsfaster,heorshe?Herunsfasterthanshe.
