1.原级比较由“as+形容词或副词(或再加名词或短语)+as”构成“原级相同”比较句，表示两者比较；其否定式，即“程度不及”比较句型为“notso(as)+形容词或副词+as”，而且as…as结构前可用just,almost,nearly,quite等表示程度的词修饰
1)Walkingbrisklyforthirtyminuteswillburnasmanycaloriesas.
〔A〕torunforfifteenminutes
〔B〕runningforfifteenminutes
〔C〕yourunforfifteenminutes
〔D〕fifteen?minutewalking
2)Thegorilla(大猩猩)，while〔A〕notquiteascuriousthan〔B〕thechimpanzee(黑猩猩)，showsmorepersistence〔C〕andmemoryretention(记忆力)insolving〔D〕aproblem.
3)Alaskaistwice〔A〕aslarger〔B〕as〔C〕thenextlargest〔D〕state，Texas.
2.“as(so)+名词+as+名词”进行名词比较，这时一般情况下有一个表示原级的比较词，但如果第一名词前出现了形容词修饰该词或出现副词修饰谓语，应当用so而不用as
4)ThomasJefferson’sachievementsasanarchitectrivalhiscontributionsapolitician.
〔A〕such
〔B〕more
〔C〕as
〔D〕than
5)IshouldsayHenryisnotmuchawriterasareporter.(88年考题)
〔A〕that
〔B〕so
〔C〕this
〔D〕as
3.表示“是……几倍”时用“twice;threetimes等+as形容\副词as...”eg.1)Thisbookcoststwiceasmuchasthatone.这本书的价钱是那本书的两倍。
2)HehasfourtimesasmanybooksasIhave他拥有的书是我拥有的四倍1.比较级由“形容词(副词)比较级+than+…，”构成表示在两者中间一方比另一方“更加…”。连词than后可接句子，也可接名词、代词、名词短语、介词短语、动词、动词不定式、?ING结构和?ED结构，有时也可省去than。
6)Naturalmica(云母)of〔A〕asuperior〔B〕qualityischeapest〔C〕toobtainthansynthetic〔D〕mica.
7)Sheisolderthan.
〔A〕anyothergirlinthegroup
〔B〕anygirlinthegroup
〔C〕allgirlsinthegroup
〔D〕youandmeaswellasthegroup
8)JosephineMcCrackinjoined〔A〕the“SantaCruzSentinel”in1905and，untilherdeathfifteenyearslate〔B〕，remained〔C〕activeinjournalistic〔D〕work.
2.注意than前后两项相比较的人或事物要一致
9)Thepurposeoftheresearchhadamoreimportantmeaningforthemthan.
〔A〕ours
〔B〕withus
〔C〕foroursithad
〔D〕itdidforus
10)Soundtravelsair.
〔A〕fasterthroughwaterthanthrough〔B〕fasterthanthroughwaterand
〔C〕throughwaterfasterand〔D〕whereitisfasterthroughwaterthanthrough
11)GerbrandvondenFeckhout，oneofRembrand’spupils，followed〔A〕thestyleofhisteachersoimplicitlythat〔B〕hispaintings〔C〕aresometimesconfusedwithhismaster〔D〕.1.最高级用于三者以上比较，形容词的结构形式是“定冠词+形容词最高级+名词+表示范围的短语（地点）或从句”(如all,ofall,ofthetree,intheworld,thathasevertakenplace等)或“定冠词+形容词最高级+of+人群”
12)Themore〔A〕fearsomeofallthe〔B〕animalsin〔C〕theWestern〔D〕Hemisphereisthegrizzlybear.
13)Ofalleconomic〔A〕problems，inflationcontinuestobe〔B〕a〔C〕mostsignificantinitsdailyimpacton〔D〕peopleandbusiness.
14)，themostfamiliartogeneralpublicisthecriminaljurisdiction.
〔A〕Alltheactivities
〔B〕Theactivities
〔C〕Ofalltheactivities
〔D〕Itistheactivities
2.副词的最高级与形容词最高级的区别在于最高级可以不用定冠词the
