Unit9Lesson5GrammarinUse课件仁爱科普版八年级英语下册

Unit9ForcesofNatureGrammarinUse通过本课的学习，学生能够:1.通过观察和阅读句子理解句中合成词的含义；2.理解和运用副词的比较级和最高级来描述自然灾害；3.感受自然灾害中沙尘暴、飓风等带来的危害,增强安全防范意识并学会基本的地震应急自救措施。LearningObjectivesActivity1

Lookatthepicturesandreadthesentences.Payattentiontothecompoundwordsinbold.Asnowstormisastormwithstrongwindsandalotofsnow.Athunderstormisastormwiththunderandlightning.Anearthquakeisaquakeofthesurfaceoftheearth.snow+storm=snowstormthunder+storm=earth+quake=thunderstormearthquakecompoundwords(合成词)/stɔ:m/n.

暴风雨/'θʌndə/n.

雷/'laɪtnɪŋ/n.

闪电/kweɪk/n.

地震构成方式：由两个或多个基础单词拼接而成，例如：book（书）+

case（盒子）→

bookcase（书架）sun（太阳）+

flower（花）→

sunflower（向日葵）意义整合：合成词的含义并非原词意义的简单叠加，而是形成新的特定概念，例如：butter（黄油）+

fly（飞）→

butterfly（蝴蝶，并非“黄油飞”）break（打破）+

fast（快）→

breakfast（早餐，指“打破食”）语法功能：作为单一词汇使用，有独立的词性，例如：名词：notebook（笔记本）、classroom（教室）动词：babysit（照看婴儿）、sunbathe（日光浴）形容词：snow-white（雪白的）、part-time（兼职的）合成词Activity2

Fillintheblankswiththegivenwordsinthebox.flashlightsandstormaftershocksupermarket1.You’dbetterbringa(n)__________ifyouneedtowalkonadarkroad.2.Peoplelivinginthedesertknowhowtokeepthemselvessafewhena(n)__________comes.3.Weshouldbuycookedfoodandcleanwaterinthe_____________beforesnowstorm.4.Astrong__________oftheearthquakehappenedabout40minuteslater,anditcausedmoreharmtothearea.flashlightsandstormsupermarketaftershockActivity3

Readthetextandguessthemeaningoftheunderlinedwords.Withfewergrasslandsinsomeareas,thesandstormappearsmoreoften.Sandstormscancoverfarmlands,causetrafficaccidents,andharmhumanhealth.Peopleshouldtakeactionintimetofightagainstsandstorms.Or,thesandstormmaybecomeaworldwideproblem.grass+land=grasslandsand+storm=sandstormfarm+land=farmlandworld+wide=worldwide

(草地)(沙尘暴)(农田)/ə'geɪnst/prep.

反对(全世界范围的)Activity1

Pairwork.Readtheconversation.Payattentiontothewordsinbold.Willtherebeadisasterpreventiontrainingatschooltomorrow?Noproblem!Whatshouldweweartoschool?Yes.Wemustarriveearlierthanusual.We’dbetterwearsportsshoes.Wecanperform

bestinsportsshoes./prɪ'venʃn/n.

预防/'ju:ʒəl/adj.

通常的/pə'fɔ:m/v.

演出；表演earlier是early的比较级best是well的最高级副词比较等级英语中，副词有三个等级，即原级、比较级和最高级。1.副词比较等级的构成副词比较等级的规则变化与形容词比较等级的规则变化大致相同。例如：原级

比较级

最高级fastfasterfastesthardharderhardestlatelaterlatestearlyearlierearliest下列副词的比较等级为不规则变化原级

比较级

最高级badlyworseworstfarfarther/furtherfarthest/furthestlittlelessleastmuchmoremostwellbetterbest副词比较等级2.副词比较等级的用法副词比较等级的用法与形容词比较等级的用法基本相同。（1）原级

表示比较双方程度相同时，常用“as+副词原级+as”结构，意为“……和……一样”

。

例如：Iwanttoliveashappilyasbefore.我想和以前一样快乐地生活。表示双方程度不同时，常用“notas/so+副词原级+as”结构，意为“……不如……”。例如：Kangkangdoesn’tdrawas/socarefullyasLiHua.康康画画不如李华认真。（2）比较级两者之间比较时，常用“副词比较级+than”结构，意为“比……更……”。例如：LiHuacutsmorefinelythanher.李华比她切得更细。表示否定的比较级可用“less+副词原级+than”结构，表示“……不如……”。例如：HespeakslessloudlythanIdo.他说话声音没有我大。副词比较等级（3）最高级

三者或三者以上比较时，常用“the+副词最高级+in/of...（比较范围）”结构，意为“某人（或某物）在某范围内最……”。副词最高级前可省去the。例如：LinTaojumps(the)highestinourclass.

林涛在我们班里跳得最高。

LiFengsings(the)bestofall.李峰是所有人中唱得最好的。3.副词比较等级中的注意事项（1）在同级比较结构中，第一个as前可加half、twice、threetimes等词来修饰，表示倍数关系。例如：LiuMeijumpstwiceasfarashersister.刘梅跳得是她姐姐的两倍远。（2）副词的比较级前可用much、alot、alittle、abit、even、still、far等词来修饰，表示不同程度。例如：Sheplayedthepianomuchmorewonderfullythanyou.她钢琴弹得比你棒得多。（3）借助other、else或否定词，比较级形式可用来表示最高级概念。例如：Nobodyrunsfasterthanhim.没人跑得比他快。（4）“the+比较级……，the+比较级……”表示“越……，越……”。例如：Themoreyouread,themoreyoulearn.你读书越多，学到的知识就越多。（5）“比较级+and+比较级”表示“越来越……”。例如：Itisrainingmoreandmoreheavily.雨越下越大。1.写出下列副词的比较级和最高级形式：late→______→______badly→______→______hard→______→______early→______→______well→______→______far→______/______→______/______2.用括号内单词的适当形式填空：Sheworks_______(hard)thanherbrother,butherfatherworks________(hard)inthefamily.Hearrived________(early)thanme,butshearrived_________(early)intheclass.Tomruns____________(quick)thanJack,butSamruns______________(quick)ofall.Thebirdsings__________(loud)thanthefrog,butthealarmrings__________(loud)ofall.laterlatestworseworstearlierearliestbetterbestharderhardestmorequicklymostquicklyharderhardestmoreloudlymostloudlyearlierearliestfartherfurtherfarthestfurthest注意：farther和farthest指物理距离的更远和最远；further和furthest指抽象程度上的延伸，表示更进一步，更深层次和最深层次。Activity2

Completethetableandlearnhowtousethecomparativeandsuperlativeadverbs.AdverbComparativeSuperlativefastTheforestfirespreadfasterthanwethought.Theguardsran(the)fastesttoputoutthefire.carefullyHedrives_____________thanIdo.XiaFengchecksthewindows___________________.farWeneedtowalk_______tokeepawayfromtheflood.Thefloodwaterreached_____intotheeasternpartofthecityaftertheheavyrain..morecarefully(the)mostcarefullyfarther(the)farthest物理距离上的更远物理距离上的最远Activity3

Completethetextwiththecorrectformofthegivenwords.badfarhardhighterribleOnNovember1st,2012,HurricaneSandysweptthroughourtown.Istillrememberhowterriblethesuperstorm

was.Welived________awayfromthebeachthanmostofourneighbors,andourhousestoodonahillside.Ithoughtweweresafe.Butthewindwasblowing__________everyminuteandthewaveskeptreaching__________.Soon,thestormarrivedandtookawaytheroofofourhouse.Ithitthebeachsideofthetown______________.Nearlyeverythingtherewasgone.Itisa_______painfulexperienceformeand