词根词缀.ppt

“词根”“词缀”是什么？单词由词根和词缀构成词缀又分为前缀和后缀也就是说，单词一般由三部分组成：词根、前缀和后缀词根决定单词意思，前缀改变单词词义，后缀决定单词词性词根常用词根（初阶）1.-equ-相等的equal,equable,equably,equabilityequity,equitable词根常用词根（初阶）2.-medi-mediate,intermediatemedieval其他：-centr-,-just-,-form-......词根常用词根（中阶）1.-civ-公民civil,civilian,civilize,recivilize,civilization词根常用词根（中阶）2.-sim-相同similar,dissimilar,similaritysimultaneous,simultaneity其他：-electr-,-scrib-,-frig-......词根常用词根（高阶）1.-dur-持久duringdurable,duration,nondurable词根常用词根（高阶）2.-leg-法legal,illegal,legislationlegistimate其他：-aer-,-fibr-,-al-前缀改变词义的前缀有哪些呢？表否定表数字表时间和次序表尺寸其他否定前缀常见的11种规律imilir、dis-:disadvantage,disagreein-:incorrect,inaccurateim-:impossible,impoliteil-:illegal,illiterateir-:irregual,irresistableun-:unfinished,undoubtedlynon:nonessential,nonexistencemis-:misunderstand,misfortunedis-:disappear,disconnectanti-:antisocialcounter-:counteract数字前缀semi-:semiconductor,semicirclemono-:monopoly,monochromebi-:bilateral,bicolortri-:triple,trianglemulti-:multination,multimedia时间次序前缀pre-:preface,preconceptionpro-:prologuefore-:forehead,foreseeex-:ex-president,ex-wifepost-:postwar尺寸前缀mini-:miniature,miniskirtmicro-:microwave,microscopemacro-:macroworld,macrostructuremega-:megacity,megahertz常见的四种后缀1.名词性后缀2.形容词性后缀3.副词性后缀4.动词性后缀名词性后缀1.-ion:occasion,division2.-ist:specialist,biologist3.-ment:experiment,measurement'4.-ness:darkness,hardness5.-cy:infancy,accuracy6.-ency/ancy:tendency,emegency,constancy,pregnancy7.-logy:psychology,histology8.-ty:capacity,similarity形容词性后缀1.-able:acceptable,available2.-al:vocal,captial3.-ant:significant,resistant4.-ar:regular,muscular5.-ary:ordinary,anniversary6.-ent:consistent,efficient7.-ful:useful,successful副词性后缀1.-ly:likely,immediately2.-ward:forward,backward3:-wise:likewise,otherwise动词性后缀1.-ate:accelerate,operate2.-en:weaken,deepen3.-ize:standardize,modernize根据后缀辨别下列单词的词性1.scientist2.singer3.conversation4.beautiful5.loudly6.advertisement7.government8.yearly9.instruction10.careful11.lively12.safety13.national14.traditional15.illness16.wonderful17.competition18.information19.successful20.natural21.usually22.lovely23.really24.friendly