Unit7SectionAGrammarFocus-4c课件人教版八年级英语下册

SectionAGrammarfocus~4cUnit7What'sthehighestmountainintheworld?学习目标1.学习形容词、副词的比较级和最高级。2.学习新单词:thePacificOcean，ocean。nice—nicer—nicestOralpracticeDescribethepicturesbelow.Jim---youngKate---youngerbaby---youngestyoung—younger—youngestOralpracticeheavyheavy---heavier---heaviestOralpracticelovelylovely---morelovely---mostlovelyOralpractice形容词、副词的比较级和最高级的变化规则。

复习旧知识进入新课

大多数形容词和副词都有三个级。1）原级:常用结构:as...as...

像..….一样

2)比较级

(用于两者之间的比较),常用结构：形容词比较级＋than...3)最高级(用于三者或三者以上的比较)，常用结构:the+形容词的最高级＋of/in...要求：学生讨论总结本节课所学的知识，派代表发言（2分钟）1）一般情况下，单音节或双音节的形容词（或副词）比较级＋er

，最高级＋est2)以e结尾的词，比较级＋r，最高级＋st

即可。3)以辅音字母＋y结尾的变y为i＋er或est。4）一辅重读闭音节，词尾辅音字母要双写4)多音节和部分双音节的词需在形容词原级前＋more构成比较级，＋themost构成最高级。形容词、副词比较级和最高级规则变化要求：自己朗读规则，尽量记住。(2分钟）What’sthehighest

mountainintheworld?Qomolangma.HowhighisQomolangma?It’s8,844.43metershigh.It’shigher

thananyothermountain.Whichisthedeepestsaltlakeintheworld?TheCaspianSeaisthedeepest

ofallthesaltlakes.

DidyouknowthatChinaisoneoftheoldestcountriesintheworld?Yes,Idid.It’smucholder

thantheUS.GrammarfocusGrammarfocus1.—世界上最高的山峰是哪个？

—珠穆朗玛峰。

—What’s____________mountainintheworld?—Qomolangma.Fillintheblanksaccordingtothetext.thehighest2.—珠穆朗玛峰有多高？

—它高8844.43米。它比别的山都高。

—HowhighisQomolangma?—It’s_________________.It’s_______

thananyothermountain.8844.43metershighhigher3.—世界上最深的咸水湖是哪个？

—里海是世界上最深的咸水湖。

—Whichis___________saltlakeintheworld?—TheCaspianSeais_________________________________.thedeepestthedeepestofallthesaltlakes4.—你知道中国是世界上最古老的国家之一吗？

—我知道。中国比美国古老。

—DidyouknowthatChinais______________________intheworld?—Yes,Idid.It’smucholderthantheUS.oneoftheoldestcountries用于俩者之间程度是否相同的比较。1.肯定形式用as+形容词原级+as+比较成分，表示:和…一样.2.否定形式用notso(as)+形容词原级+as+比较成分，表示:前者不及后者。3.asmany/much(…)+as…表示前后数量一样多。4.as+形容词原级+as+用作比喻的名词，表示:像…一样…(多用于口语)形容词原级1.形容词比较级＋than+比较成分，表示：前者比后者...更（后面的动词往往省略）2.否定的比较：less+形容词原级+than+比较成分，表示：前者不及后者…3.表示俩者之中较用the+比较级+ofthetwo.4.比较级形容词可以用alittle,much,even,still,far,verymuch,any,no,rather,alot(agreatdeal),alittle（abit）等修饰，表示某种程度，但不可用very修饰。形容词的比较级(用于两者之间的比较):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。(in/of/among..)例如：ZhangHuaisthetallestofthethree.最高级的用法用代词的所有格也可表示范围。eg:Youaremyfondeststar.你是我最喜欢的明星。2.最高级可被序数词以及much，byfar，nearly，almost，bynomeans，notquite，notreally，nothinglike

等词语所修饰。例如：Thishatismuchthebiggest.Howmuchdidthesecondmostexpensivehat?3.表示“最高程度”的形容词，如excellent，extreme，perfect等，没有最高级，也不能用比较级。4.形容词最高级修饰作表语或介词宾语的名词、代词时，被修饰的词往往省略。e.g.Heisthetallest(boy)inhisclass.5.作状语的副词最高级前可以不加定冠词。e.g.Ofalltheboyshecame(the)earliest.5.最高级考点说明：形容词的最高级前必须加the；副词的最高级前省略the。①范围问题e.g.Tomisthetalleststudentintheclass.

②“......之一”问题e.g.Beijingisoneofthebiggestcitiesintheworld.③“the+序数词+最高级”e.g.Ithinkheisthesecondtallestboyinhisclass.3.最高级的其他表达：e.g.Tomisthetalleststudentintheclass.Tomistallerthananyotherstudentintheclass.Tomistallerthanalltheotherstudentsintheclass.NootherstudentsaretallerthanTom.Nostudentinourclassisas

tallasTom.Fillintheblankswiththecorrectformsofthewordsinthebox.bigmuchpopularlongoldhigh1.TheAmazonRiverisoneofthe_______

riversintheworld.It’salittle_______ thantheYangtzeRiver.2.Qomolangmais8,844.43meters_____. It’soneofthemost________placesfor seriousmountainclimbers.longestlongerhighpopular4a3.Nooceanintheworldisas_____as thePacificOcean.4.AlthoughJapanis_______than Canada,itis_______smaller.bigoldermuch太平洋n.

大海；海洋Writetwocomparisonsabouttwotopics.Writetruefacts.Tworivers:_________________and___________________________________________________________________________________________________________________________________________________________________________________________e.g.4bTheYangtzeRiverisalmostaslongastheAmazonRiver.TheAmazonislongerthantheYangtze,buttheYangtzeRiveristhelongestriverinChina.theYangtzeRivertheAmazonRiverWritefivequestionsusingcomparisons.Thenaskyourpartneryourquestions.1._________________________________2._________________________________3._________________________________4._________________________________5._________________________________e.g.4cWhatisthehighestbuildinginourcity?Whatisthebusiestbusstationinourcity?Whatisthelargestshoppingmallinourcity?Whatisthebiggestparkinourcity?Whatisthelongestroadinourcity?Discussion:1.Hainanisaverylargeisland.It’sthesecond____islandinChina.A.largeB.larger

C.largest2.Anelephantis_____thanahorse.

muchheavy

B.muchheavier

C.heaviest

学以致用CB3.The_____friendsyouhave,the____youwillbe.

A.more,happy

B.many,happy

C.more,happier

D.many,happier4.Whenheheardacryforhelp,heranoutas_______ashecould.

hardly

B.quickly

C.finally

D.slowlyCB5.ThisplaceisnotbigenoughforLucy’sbirthdayparty.Weshouldfinda_____one.

big

B.small

C.bigger

D.smallerC用所给的词的适当形式填空：1.Thiscoatis

(expensive)thanthatone.2.Nancyjoins

(few)clubsthanI.3.MissGaosingsas

(good)asMissYang.(同义句)Henryisthesame

(tall)asJohn.4.Maryis

（good）atmaththanherdesk-mate.5.The

(old)ofthetwomenismyuncle.moreexpensivefewerwelltallbetterolder用所给的词的适当形式填空：6.Whoruns

(fast),Lucy,LilyorMary?7.TheYellowRiverisoneof

(long)riversinChina.8.Iamalittletallerthan

.Andmyhairislongerthan

.(you)9.Sheis

inthis

film.(interest)fastestlongestyouyoursinterestedinteresting1.WearegoingtotheGreenRestaurantforlunch.(就划线部分提问)____________yougoingforlunch?2.Samistheshortestinhisclass.(改为同义句)Samis________than_________studentinhisclass.Samis_______than__________studentsinhisclass.Samis_______than______________inhisclass.3.HowdoyoulikeScreenCity?(改为同义句)_______doyou__________ScreenCity?WhereareshorteranyotherWhatthinkofshortertheotheranyoneelseshorter练习：改写句子二、同义句转换

1.FlatAismoreexpensivethanFlatBFlatBis_______________thanFlatA.