2017考研英语词汇:表反义否定的10类前缀词根词缀法是考研英语背单词的好方法,科学合理,一旦掌握了,猜词能力也会大大提升。建议大家记忆词根词缀可以按分类来看,下面是10类表示反义否定的前缀,大家先看看记下来。1、a-/an-(not,without否定)apo1iticala.不关心政治的e.g.Henryusedtobetotallyapolitical,butIthinkheisnowpoliticallymoreaware基辛格过去完全不问政治,但是,我认为现在他政治上比较敏锐了.anonymousa.匿名的,无名的,不知名的e.g.She'sgottoomuchdignitytodescendtowritinganonymousletters.她是个自尊心很强的人,绝不会自贬身份去写匿名信。2、a-/ab-/abs-(在tv之前)(avoid避免)abstainv.弃权,戒e.g.Theysayitwouldbepoliticalsuicideforthepartytoabstain.他们说这个政党弃权无异于自毁政治前程。abstractv.n.摘要e.g.Hispaintingwentthroughbothrepresentationalandabstractperiods.他的绘画经历了具象风格和抽象风格两个阶段。3、ant-(against/opposite反抗反抗)anti-government反政府的e.g.MrCramersaidtheviolencebyanti-governmentprotestorswasreprehensible.克拉默先生说反政府示威者的暴力活动应该受到谴责。antisocial反社会的e.g.Toddlersarenotoriouslyantisocialwhenitcomestosharingtoys.众所周知,刚学会走路的孩子不愿和别人分享玩具。4、counter-/contra-(against,opposite反,对应)contrast对比,对照;e.g.Theboy'sroomisacompletecontrasttotheguestroom.这个男孩的房间和客房截然不同。counteract抵抗;e.g.Myhusbandhastotakeseveralpillstocounteracthighbloodpressure.我丈夫不得不吃几片药来降压。5、de-away,down,negative离开,分,否定,使低下decomposev.分解,腐烂e.g.Mostanimalsdecomposeveryquicklyafterdeath.大多数动物死后很快腐烂.degeneratev.堕落e.g.Willtoomuchfreedommakethemdegenerate?太多的自由会令他们堕落吗?6、dis-(加在名、形、动词前)表示不,不再disadvantagen.不利,不利条件;e.g.Depressionisthethirdthingthatworkstomypatients'disadvantage.抑郁是威胁我的病人健康的第三大杀手。disappear.v.消失e.g.Hesawsomethingdarkdisappearbehindthecurtainofleaves.他看到一个黑漆漆的东西从浓密的树叶后消失了。disconnect.v.分离e.g.Youshoulddisconnectthewirelesssetbeforeyoumakeadjustmentsinsideit.你应先拔掉无线电插头,再做内部调整。7、di-,dif-,dis-:away,negative否定,分开,不distrust.v.不信任,怀疑e.g.Whathesawtherelefthimwithaprofounddistrustofallpoliticalauthority.他在那儿的所见让他对一切政治当局产生了一种深深的不信任感。disassemblev.拆开e.g.Wehadtocompletelydisassembletheenginetofindtheproblem.我们只好把发动机全部拆开以寻找故障原因。differentiatev.区分e.g.Achildmaynotdifferentiatebetweenhisimaginationandtherealworld.儿童可能无法将自己的幻想与真实世界区分开来。8、il-:(加在以l开头的词前)表示不illiteraten.文盲;e.g.Manyseniormanagersaretechnologicallyilliterate.许多高级经理都对技术知之甚少。illegitimatea.非法的e.g.Theelectionwasdismissedasillegitimatebytheopposition.反对党以不合法为由拒绝接受选举结果。9、im-,in-(加在字母m,b,p之前)not,in,into否定,加强或引申意义impracticable行不通的e.g.Suchmeasureswouldbehighlyimpracticableandalmostimpossibletoapply.这样的措施非常不切实际,几乎不可能付诸实施。invisible不可见的;e.g.Parentsfeartheymightoversteptheseinvisibleboundaries...父母担心他们可能会逾越这些无形的界限。irrational不合理的;e.g.Hisbehaviorwasbecomingincreasinglyirrational.他的行为变得越来越不理智了。10、mal-bad,badly:恶,不良maltreat虐待;e.g.Hesaidthathewasnottorturedormaltreatedduringhisdetention...他说自己在押期间并未遭受拷问和虐待。malnutrition营养不良e.g.Infectionsaremorelikelyinthosesufferingfrommalnutrition.营养不良的人更有可能被传染。