八年级英语上册《Unit1FriendsPeriod4Grammar》教案Teachingaims:1.Tolearnhowtoformcomparativeandsuperlativeadjectives.2.Tolearnhowtousecomparativeandsuperlativeadjectives.Step1.PresentationPresentsomenewwords:bad—worse—worst,height,weight,competition.Thenreadaloudallthenewwords.Step2Lead-inShowsomepicturestotalkaboutheight.Leadinthecomparativeandsuperlativeadjectives:tall,tallerandtallest,interesting,moreinterestingandmostinterestingStep3Grammar1.Teachhowtoformcomparativeandsuperlativeadjectives.ThencompleteAonpage12.2.Teachhowtousecomparativeandsuperlativeadjectives.ThencompleteB.Step4Summary一、英语中形容词通常有三种等级——原级、比较级和最高级，用来描述人或事物在某个方面的不同程度。其中比较级的构成分为规则变化（分为长词变化规则和短词变化规则两类）以及不规则变化。如：long—longer—longest,important—moreimportant—mostimportant，many/much—more—most。二、当把两个人或事物作比较时要用比较级，即：两者之间用比较级。如：Whoismoregenerous,KittyorSandy?三个及以上的人或事物之间进行比较时要用最高级，即三者及以上用最高级。如：Whosedrawingisthemostbeautiful,Millie’s,Sandy’sorAmy’s?三、比较级常和than连用，最高级常和三者及以上的范围连用，如:inherclass,ofthethree,ofall,amongthesixstudents，inChina等等。Step5Exercise一、单项选择：1.Whichis_______,thesun,themoonortheearth?A.bigB.biggerC．biggestD.thebiggest2.Sheis_______swimmeramongthem.A.goodB.bestC.betterD.thebest3.Herdrawingis_____thantheotherthree.A.beautifulB.morebeautifulC.themostbeautifulD.themorebeautiful4.Whosebikeis______,hisorhers?A.newB.newwerC.thenewestD.newer二、翻译句子：1.这台电脑比那台贵。Thiscomputeris___________________thatone.2.这三个盒子哪一个最重？Whichboxis__________________________?3.今天比昨天热吗？Istoday____________yesterday?4.在这些学生中，Sandy数学最好。Sandyis__________________________________.5.第一道数学题比第二道难得多。Thefirstmathsproblemismuch______________________thesecondone.Homework1.Remembertheuseofcomparativesandsuperlativesoftheadjectives.2.Previewthenewwordsinthenextlesson.
