Unit2GlobalWarmingSECTION3语法THEGENERALIDEAOFTHISSECTIONThissectionwilldealwiththecomparativeconstruction.TEACHINGAIMSIntroducesomemoreformsofthecomparativeconstruction.TEACHINGIMPOINTANTPOINTS形容词与副词的比较级TEACHINGDIFFICULTPOINTSHowtohelptheSslearnthecomparativeconstruction.TEACHINGMETHODSDeductiontothecomparativeconstructionwhatwehavelearnedTEACHINGAIDSAmultimediaAblackboardTEACHINGPROCEDURESStep1Greetingandrevison1Greetthewholeclassasusual2ChecktheirhomeworkifanyStep2形容词与副词的比较级大多数形容词（性质形容词）和副词有比较级和最高级的变化，即原级、比较级和最高级，用来表示事物的等级差别。原级即形容词的原形，比较级和最高级有规则变化和不规则变化两种。一规则变化1.单音节词和少数双音节词，加词尾-er，-est来构成比较级和最高级。构成法原级比较级最高级2.一般单音节词未尾加-er,-esttall(高的)―taller―tallestgreat(巨大的)－greater－greatest3.以不发音的e结尾的单音词和少数以-le结尾的双音节词只加-r,-stnice(好的)－nicer－nicestlarge(大的)－larger－largestable（有能力的）－abler－ablest4.以一个辅音字母结尾的闭音节单音节词，双写结尾的辅音字母，再加-er，-estbig(大的)－bigger－biggesthot热的)－hotter－hottest5.以辅音字母+y"结尾的双音节词，改y为i，再加-er，-esteasy(容易的)－easier－easiestbusy(忙的)－busier－busiest6.少数以-er，-ow结尾的双音节词未尾加-er，-estclever(聪明的)－cleverer－cleverestnarrow(窄的)－narrower－narrowest7.其他双音节词和多音节词，在前面加more，most来构成比较级和最高级。用心爱心专心116号编辑important(重要的)－moreimportant－mostimportanteasily(容易地)－moreeasily－mosteasily二不规则变化原级－比较级－最高级good(好的)/well(健康的)－－better－bestbad(坏的)/ill(有病的)－worse－worstold(老的)－older/elder－oldest/eldestmuch/many(多的)－more－mostlittle(少的)－less－leastfar(远的)－farther/further－farthest/furthestmore…than的使用见Unitsection3课件Step3Summaryandhomework教材P211and2Step4ThedesignofthewritingontheblackboardUNIT2GLOBALWARMINGSECTION3GRAMMAR形容词与副词的比较级一．规则变化二．不规则变化Step7ActivitiesandResearch1Presentationoftheusageofthecomparativeconstruction.2Exercisetoconsolidatewhattheyhavelearnedaboutthecomparativeconstruction.用心爱心专心116号编辑
