广东省深圳市松泉中学八年级英语上册Module2ScienceandtechnologyUnit3ComputersGrammar课件新版牛津深圳版

Unit3Computers

GrammarThecomparativeofadjective

形容词比较级Formthecomparativeofadjective比较级的形式adj.Comparativeofadj.cheapcheapertalltallerinterestingmoreinterestingexpensivemoreexpensiveMybrotheristallerthanme.Thisoneischeaperthanthatone.Thisfilmismoreinterestingthanthatone.WorkouttheruleToformthecomparativeofadjectives,weoftenadd______toshortadjectivesanduse________withlongadjectivesWeoftenuse________afterthecomparativeofadjectives.ermorethanCompletetheconversationbelowandonpage40withthecomparativeofadjectives.Salesman:CanIhelpyou,sir?David:Yes,Ineedasuitcase.Canyoutellmeaboutthesetwo?Salesman:Sure.Theredonecosts￥2,500,andit’smadeofleather.David:Isee.Theredoneis______________thantheblackone.Whataboutthe

weight?

Whichoneis____________?moreexpensiveheavierSalesman:Theblackone.Itismadeofplastic(塑料）.Trythem,sir.David:Youareright.Theredoneis_______________thantheblackone,andit’s_________thantheblackone.Salesman:Doyouhavealotofthingstocarry?David:Yes,Ido.Iwillhavetheblackonebecauseit’s________thantheredone.Salesman:Thankyouverymuch,sir.moreexpensivelighterbigger形容词比较级的变化的规则：

（一）单音节词，双音节词的比较级

⑴一般在词尾加er

；

⑵以字母e结尾，加r；

⑶以一个元音字母和一个辅音字母结尾，应双写末尾的辅音字母，再加er

；⑷以“辅音字母+y”结尾，先把y变i，再加er

。（5）以ly结尾构成形容词词缀如：friendlymorefriendly（6）分词形容词前加more如：boringinterestingboredinterested（7）以形容词后缀结尾的形容词前加morecarfulmorecareful（8）特殊变化well/goodbettermany/muchmore

（二）多音节词的比较级前加more

morecarefulmorebeautiful

写出下列形容词或副词的比较级

old__________

young________

tall_______

long________

short________

strong________

big________

small_______

fat_________

thin__________

heavy______

light________

olderyoungertallerlongershorterstrongerbiggersmallerfatterthinnerheavierlighter

nice_________

good_________

beautiful__________________

low__________

high_________

boring_______

difficult________

late__________

many_________

much_______

nicerbettermorebeautifullowerhighermoreboringmoredifficultlatermoremoreThesuperlativeofadjectivesWhenwecomparemorethantwopeopleortwothings,weusethesuperlativeofadjectives.Theredlaptopisthesmallest

among

thethreeWeformthesuperlativeslikethis:AdjectivesSuperlativeofadjectiveshighthehighestcareful

themostcarefulinterestingthemostinterestingWorkouttheruleToformthesuperlativeofadjectives,weoftenadd__________totheshortadjectivesanduse__________withlongadjectives.Weusuallyuse__________infrontofthesuperlativeofadjetives.estmostthe形容词最高级的变化的规则：

（一）单音节词，双音节词的比较级

⑴一般在词尾加est

；

⑵以字母e结尾，加st

；

⑶以一个元音字母和一个辅音字母结尾，应双写末尾的辅音字母，再加est

；⑷以“辅音字母+y”结尾，先把y变i，再加est

。（5）以ly结尾构成形容词词缀如：friendlymostfriendly（6）分词形容词前加most如：boringinterestingboredinterested（7）以形容词后缀结尾的形容词前加mostcarfulmostcareful（8）特殊变化well/goodbestmany/muchmot

（二）多音节词的比较级前加mostthemostdifficultthemostcarful

记住别忘了在最高级前加the哦Readandcompare:younglongfullshortsmalloldfineyoungeryoungestlongerlongestfullerfullestshortershortestsmallersmallestolderoldest

finerfinest记住别忘了在最高级前加the哦easyhungryearlyheavybigredeasiereasiesthungrierhungriest

heavierheaviestbiggerbiggest

redderreddestearlierearliestReadandcompare:B1.Davidisshoppingforacamera.Lookatthephotosandwritetheletterofthecorrectmodelaftereachstatement.DavidtoldhisfriendTonyabouthisshoppingtrip.CompleteDavid’ssentenceswiththesuperlativeoftheadjectivefromthebox.

expensivelightoldsmallTony:Didtheyshowyouanycameras?David:Yes.(1)Thesmallestmodelis(2)99.8X56.4mmX24.5mm.The(3)______________modelcosts(4)_______________________The(5)_______________modelwasmadein(6)________________The(7)___________________modelweighs(8)_________________mostexpensive￥3589lightest170goldest2010Let’sdomoreexercise根据句意填入单词的正确形式：

1.Mybrotheristwoyears_______(old)thanme.

2.Whichis__________(heavy),theelephantorthepig?

3.Isyoursister_________(young)thanyou?Yes,

sheis.

4.Whois___________(thin),youorHelen?

Helenis.

5.Whose（谁的）pencil-boxis__________(big),yoursorhers?Hersis.

olderheavieryoungerthinnerbiggerIthinkEnglishis_________thanmaths.A.importantB.moreimportantC.mostimportantD.