achapter4比较级最高级

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1、ReadthetextagainandfinishexerciseD&E(P47)DFindthefactsEreadandthinkThekeystoExD.1.HiddenhelpersA.Therearemanytiny,hiddencomputersineveryone’shome.B.Peoplearemoredependentoncomputersthantheyrealize.2.Whatkindofjobscanacomputerdo?A.Computersrarelygivenwronganswersatcalculating.B

2、.Itiscorrect.3.IscomputerclevererthanIam?A.It’scorrect.B.Computermaybebetteratdoingtheirjobsthandoctors,judgesandteachersinthefucture.EReadandthink2.calculate;type;print;draw3.operaterailways;flyplanes;spaceship4.createnewideas5.nothingtodolanguageAThecomparativeofadjectivesWhen

3、wecomparetwothings,weadd–ertoShortadjectivesandusemorewithlongadjectives.Weoftenusethanwhenwecomparetwothings.Examples:cheap—cheaperhigh—higheruseful—moreusefulexpensive—moreexpensiveBooksarecheaperthancomputers.Computersaremoreexpensivethanbooks.形容词的比较级和最高级BThesuperlativeofadje

4、ctivesWhenwecomparetwothings,weadd–esttoShortadjectivesandusemostwithlongadjectives.Weusuallyusetheinfrontofasuperlative.Examples:fast—fastestlong—thelongestdifficult—themostusefulinteresting—themostexpensive.Moneyisvaluable.Timeismorevaluablethantime.Wateristhemostvaluableofall

5、.形容词的比较级和最高级LiuXiangis____.YiJianlianis____________LiuXiang.YaoMingis__________ofthethree.talltallerthanthetallest注意：最高级后面可用in,of,among等短语来说明比较范围。AmericaRussiaAmericaisvery_______.Chinais__________America.Russiais___________ofall.largelargerthanthelargestjadediamond1,000dollars5

6、00dollars10,000dollarsThejade（翡翠）isvery__________.Thecomputeris_____________thejade.Thediamondis_________________amongthem.expensive.moreexpensivethanthemostexpensive单音节形容词的构成方法原级比较级最高级一般在词尾加-er或-esttalltallertallest以字母e结尾的单词后加-r或-stnicefinenicerfinernicestfinest以“辅音字母+y”结尾的双音节词

7、，先改y为i,再加-er或-estearlyheavyearlierheavierearliestheaviest规则变化形容词比较级和最高级的构成moreusefulmorebeautifulthinnerbiggerhottermostusefulmostbeautifulthinnestbiggesthottestusefulbeautiful多音节词或少数双音节词，在词前加more或mostthinbighot重读闭音节词尾只有一个辅音字母时，应先双写这个辅音字母，再加-er或-est形容词比较级和最高级的构成下列双音节词前面常加more或mo

8、st-edtiredexcited-fulusefulhelpful-ingtiringbor