八年级下Unit7课件3 (Grammar-4c)

SectionAUnit7What'sthehighestmountainintheworld?GrammarFocusWhat'sthehighest

mountainintheworld?Qomolangma.HowhighisQomolangma?It's8,844.43metershigh.It'shigherthananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It'smucholderthantheUS.1.世界上最高的山是什么？珠穆朗玛峰。2.珠穆朗玛峰有多高？它高8844.43米。它比其他任何一座山都高。GrammarfocusWhat’sthehighestmountainintheworld?Qomolangma.HowhighisQomolangma?It’s8,844.43metershigh.It’shigherthananyothermountain.3.世界上最深的咸水湖是哪个？里海是所有咸水湖中最深的。4.你知道中国是世界上最古老的国家之一吗?是的，我知道。它比美国古老得多。GrammarfocusWhichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepestofallthesaltlakes.DidyouknowthatChinaisoneoftheoldest

countriesintheworld?Yes,Idid.It’smucholderthantheUS.

2)三位数以上的数，

如：16,250,164sixteenmillion,twohundredandfiftythousand,onehundredandsixty-four多位基数词读法1)101~999的三位数由“百位数＋and+两位数组成”。

如：325threehundredandtwenty-five从右到左三逗开一逗是千二逗百万三逗是十亿thousand

million

billion确切数目与不确切数目确切数目:hundred,thousand,million,billion

等前面有基数词，用单数，后接复数名词。

threehundredbooks;onehundredpeoplefivethousandstudents;sevenmillionstars2.不确切数:hundred,thousand,million,billion等后加-s且与of连用，后接复数名词。如：hundredsofpeoplethousandsofstudentsmillionsofbirdsbillionsofants注意：twohundredoftheworkers

工人中的二百（人）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。RevisionTalkaboutthefollowingpictures.6,300kilometers6,300kilometers8,844meters8,850kilometersTheYangtzeRiver

isabout6,300kilometers

long.TheYellowRiveris

5,464kilometers

long.TheMingGreatWallis

8,850kilometers

long.Qomolangmais8,844meters

high.形容词和副词的比较级和最高级大多数形容词有三个级。1.原级:Structure:as...as...像..….一样e.g.Timisas

tallas

Tom.2.比较级(用于两者之间的比较):Structure：形容词比较级＋than...e.g.Thisboxisbigger

thanthatone.3.最高级(用于三者或三者以上的比较):Structure:the+形容词的最高级＋of/in...

e.g.Tomistheheaviestinourclass.

Heisthemostpopularinourschool.形容词和副词比较级和最高级构成

(规则变化)latelater-latestearly

earlier–earliestbigbigger-biggestdifficultmore～,most～talltaller-tallestclevercleverer-cleverest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-estcheap,cold,small,warm,young,highfine,nice,safehappy,busy,dirty,easy,lazy,prettyfat,hot,red,thin,wet,

sad

narrow,yellow

quickly,slowly,useful,careful,popular,modern,

易错词识记friendly

handsomeearlyeasyslowlytired

friendlierhandsomerearliereasiermoreslowlymoretired形容词和副词比较级和最高级的构成不规则变化原级比较级最高级good/wellbetterbestbad/badly/illworseworstmany/muchmoremostlittlelessleastfarfartherfarthestfurtherfurthestOldolderoldesteldereldest(距离远)(程度深)(长幼)(年龄)2.

同级比较,比较对象要一致

TheweatherinBeijingiscolderthanthatinWuhan.

Ourschoolisbiggerthanyours.1.表示两者之间的比较，通常用连词than导，表示“更······一些”．3.much/far/a

lot,even,still,alittle/abit…修饰比较级,表示程度.Heruns

fasterthan

she.Heruns

muchfasterthan

she.Thisbookismuchmoreinterestingthanthatone.形容词和副词比较级的用法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…”

7.表示不及另一方时，用“less+原级+than…”

Hebecomes

healthierandhealthier.Themore

youexercise,

thehealthier

youwillbe.Sheis

lesshealthythan

he.Heis

healthierthan

she.Shanghaiisgetting

moreandmoremodern.6the+比较级在ofthetwo结构中比较级前用thee.g.Lucyisthefatterofthetwogirls.（1）“a/an+比较级”

表示“又一，再一”e.g.Lilyhasadoll,butshewants

abiggerone.（2）隐性比较（没有than的情况）e.g.Whorunsfaster,LucyorLily?

You’dbettercomeearliernexttime.

Heworkedhardlastterm,butheworksevenharderthisterm.注意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.Theweatherisgetting

_________________.

(越来越槽糕）worseandworseeven/stillbetter三者或三者以上相比，表示最高程度时，用“the+最高级”的结构表示。这种句式一般常有表示比较范围的介词短语。例如：ZhangHuaisthetallest

ofthethree.Heworks(the)hardestinhisclass.Sherunsfastestofthethree.

Springisthebestseasonoftheyear.说明：形容词的最高级前必须加the；副词的最高级前省略the。形容词和副词的最高级的用法注意使用最高级时应注意以下几点：

(1)表示“最……之一”的句式，要用

oneofthe+形容词最高级+复数名词。e.g.Beijingisoneofthebiggestcitiesintheworld.Lisaisnotoneofmybestfriends.(2)当最高级前面有物主代词或名词所有格时,不加定冠词the。eg：TomisLucy’sbestfriend.Tuesdayisherbusiestday.注意使用最高级时应注意以下几点：(3)最高级前可加序数词。eg：TheYellowRiveristhesecond

longestriver