词根词缀ppt课件

词汇篇,词根词缀,1,“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,2,词根,常用词根（初阶）1.-equ-相等的equal,equable,equably,equabilityequity,equitable,3,词根,常用词根（初阶）2.-medi-mediate,intermediatemedieval其他：-centr-,-just-,-form-.,4,词根,常用词根（中阶）1.-civ-公民civil,civilian,civilize,recivilize,civilization,5,词根,常用词根（中阶）2.-sim-相同similar,dissimilar,similaritysimultaneous,simultaneity其他：-electr-,-scrib-,-frig-.,6,词根,常用词根（高阶）1.-dur-持久duringdurable,duration,nondurable,7,词根,常用词根（高阶）2.-leg-法legal,illegal,legislationlegistimate其他：-aer-,-fibr-,-al-,8,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,9,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,10,数字前缀,semi-:semiconductor,semicirclemono-:monopoly,monochromebi-:bilateral,bicolortri-:triple,trianglemulti-:multination,multimedia,11,时间次序前缀,pre-:preface,preconceptionpro-:prologuefore-:forehead,foreseeex-:ex-president,ex-wifepost-:postwar,12,尺寸前缀,mini-:miniature,miniskirtmicro-:microwave,microscopemacro-:macroworld,macrostructuremega-:megacity,megahertz,13,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,14,名词性后缀,1.-ion:occasion,division2.-ist:specialist,biologist3.-ment:experiment,measurement4.-ness:darkness,hardness5.-cy:infancy,accuracy6.-ency/ancy:tendency,emegency,constancy,pregnancy7.-logy:psychology,histology8.-ty:capacity,similarity,15,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,16,副词性后缀,1.-ly:likely,immediately2.-ward:forward,backward3:-wise:likewise,otherwise,17,动词性后缀,1.-ate:accelerate,operate2.-en:weaken,deepen3.-ize:standardize,modernize,18,根据后缀