Unit5AmazingNatureGrammar语法课件外研版英语七年级下册

Unit5AmazingNatureGrammar形容词、副词的比较级和最高级【教材例句导入】1.Itisfamousfortheworld’shighest

mountain.

high的最高级2.Butthisareaisalsofullof

themostamazingcoloursinnature.

3.Theplateauisquieterthanthebigcities.amazing的最高级quiet的比较级形容词和副词的比较级和最高级的构成一、规则变化类别构成方法举例比较级最高级单音节和少数双音节单词①一般的形容词和副词在词尾加-

在词尾-

great—greater—greatesthard—harder—hardestclever—cleverer—cleverest②以字母e结尾（e不发音）的形容词和副词在词尾加-r在词尾-stwide—wider—widestlarge—larger—largestclose—closer—closest③以重读闭音节结尾的形容词，且末尾只有一个辅音字母先双写词尾的辅音字母，再加-er先双写词尾的辅音字母，再加-esthot—hotter—hottestbig—bigger—biggest④以“辅音字母+y”结尾的形容词和副词变y为i，再加-er变y为i，再加-estearly—earlier—earliesthappy—happier—happiesterest大部分双音节和多音节单词在单词前加more在单词前加

interesting—moreinteresting—mostinterestingmost二、形容词和副词不规则的比较级、最高级形式原级比较级最高级good，wellbetterbestbad/ill，badlyworseworstmany/muchmoremostlittlelessleastfarfarther/furtherfarthest/furthest比较等级变化口诀比较级要变化，一般词尾加-er。词尾若有哑音e，直接加r就可以。一辅重读闭音节，辅音字母要双写。辅音字母后加y，记得把y改成i。最高级加-est，前面加the莫忘记。形容词副词若是多音节，只把more，most前面写。【归纳】1.大部分形容词和副词有三个等级：

、

、

。

2.形容词、副词比较级的构成分

变化和

变化。

原级比较级最高级规则不规则【探究2】形容词、副词比较级和最高级的常见句型一、比较级表示两者之间的比较，常见句型如下：

句型含义用法例句A+be/动词+比较级（含more+多音节形容词/副词原级）+than+B比……更……表示“A比B更……”，即A﹥BSamhaslongerhairthanTom.Myroomisbiggerthanyours.Which/Who+be/动词+比较级，AorB？哪个/谁更……表示在A、B之间进行选择Whoistaller，LiMingorWangTao？比较级+and+比较级越来越……/Itisgettinghotterandhotter.Moreandmore+多音节形容词/副词原级Sheisbecomingmoreandmorepopular.The+比较级…，the+比较级…越……就越……/Themore，thebetter.ThebusierIam，thehappierIwillbe.A+be/动词+less+多音节形容词原级+than+B/表示“A不及B……”，即A﹤BThefilmwaslessinterestingthanthebook.二、最高级用于三者或三者以上的比较，表示在某一范围内或某类人物中“最……”，常见句型如下：句型用法例句the+最高级+比较范围表示三者或以上进行比较，常用in/of/among表示比较范围Heisthetallestboyinourclass.Ofallthesubjects，mathsisthemostdifficultforme.Sheisthemostpopularamongthegirls.oneof+the+最高级+名词复数表示“最……之一”BeijingisoneofthebiggestcitiesinChina.QuanHongchanisoneofthemostpopularsportsstars.句型用法例句Which/Whoisthe+最高级，A，BorC？表示三者或以上进行选择Whichcaristhecheapest，thefirstone，thesecondoneorthethirdone？序数词和最高级连用表示“第几……”TheYellowRiveristhesecondlongestriverinChina.注意：当形容词最高级前有形容词性物主代词或名词所有格修饰时，最高级前不用定冠词the。如：Thisismybusiestday.这是我最忙的一天。

1.long___________________2.slow___________________3.nice___________________4.late___________________5.big___________________6.hot___________________7.fat___________________8.thin___________________9.easy___________________10.happy___________________11.careful________________________________12.interesting___________________________________________

longerlongestslowerslowestnicernicestlaterlatestbiggerbiggesthotterhottestfatterfattestthinnerthinnesteasiereasiesthappierhappiestmorecarefulmostcarefulmoreinterestingmostinteresting13.good/well_____________________________14.bad/ill/badly___________________________15.many/much___________________16.little___________________17.far___________________________________betterbestworse

worstmoremostlessleastfarther/furtherfarthest/furthest二、语法点单句特训。（）1.—Whichis

，thesun，themoonortheearth？

—Thesun，ofcourse.A.big

B.bigger

C.thebiggest（）2.Thisbookis

thanthatone.

A.muchinteresting

B.moremuchinteresting

C.muchmoreinterestingCC（）3.Guangzhouisoneof

citiesinChina.

A.big

B.bigger

C.thebiggest（）4.The

youwork，the

gradesyouwillget.

A.hard；good

B.harder；better

C.hardest；best（）5.—Isyourbrotherascarefulasyou？—No，heisn’t.Heis

thanme.

A.careful

B.mostcareful

C.lesscareful

CBCCompletethefactsaboutwondersinChina.6P71shorterhigherhighestMahuLakeinSichuan:134mMahuLakeisdeep.KanasLakeis______.ChangbaishanTianchiLakeisthe______.KanasLakeinXinjiang:188.5mChangbaishanTianchiLakeinJilin:373mdeeperdeepestCompletethepassagewiththe