1、PrefixationDefinition Prefixation is the formation of new words by adding prefixes to bases.Only modify its meaning, but it has nothing to do with the word-class.classificationa)Negative prefixes否定前缀b)Reversative or privative prefixes逆反前缀c)Pejorative prefixes贬义前缀d)Prefixes of degree or size程度，范围前缀e)
2、prefixes of orientation and attitude方向，态度前缀f)Locative prefixes方位前缀g)Prefixes of time and order时间，顺序前缀h)Number prefixes数字前缀i)Conversion prefixes转化前缀j)Miscellaneous prefixes其他类型前缀Negative prefixes否定前缀 a- asocial(不善社交的)，amoral（不道德的） un- unwillingly dis-: disorder in-（il, ir, im): irresistible,impossibl
3、e,injustice non-: non-classicalReversative or privative prefixes逆反前缀 de- reversing the action, depriving of dis- reversing the action (with verb)/ lacking (with adj) un- same with ”de-”(with verb)/deprive of ,releasing fromFix to nouns to from a verbe.g.deice(除冰)， defeather（拔毛），debug（排除故障），1.With ve
4、rb: disallow, dispossess(剥夺)2.With adj: disinterest（没兴趣）, discoloured（褪色）1.With verb (de-): unbag, unlock, unwrap2.With noun to make verb:unhorse(使摔下 马)，unseat（使从座位上下来）Pejorative prefixes贬义前缀 mis- badly, bad (misunderstand) mal- wrongly, astray (maltreat虐待，malformed畸形) pseudo- false，imitation（pseudo
5、-scientific伪科学，pseudo-classification伪古典主义）Prefixes of degree or size程度，范围前缀 Extra- very (extra-large) super- more than, beyond (supernatural) Sur- over and above (surpass超越) Arch-:supreme, most （arch-bishop，arch-enemy公敌） Under-,mini-, macro-,micro-, out-, over-,sub-hyper-,co-prefixes of orientation
6、and attitude方向，态度前缀 Anti- against, opposed to (anti-government) Pro- for, on the side of (pro-democracy支持民主的) Contra- opposite, contrast（contrafactual违反事实的） Counter- against (counter-offer还价， counterstrike反击)Locative prefixes方位前缀 Extra-：outside (extra-territorial制外法权的) Fore-：front part of (forehead)
7、 Inter-：between， among (interpersonal) Intra-：within (intra-class班级的) Super-：above (superstructure上层建筑) Tele-：distant (telecommunication远距离通信) trans-：across (transmit传输)Prefixes of time and order时间，顺序前缀 Ex-：former (ex-professor) Fore-：before (foreward前言) Post-：after (post-election选举前) Pre-：before, i
8、n advance (pre-prepared前期准备) Re-：again, back (reconsider)Number prefixes数字前缀 Bi-，di-：two（bicycle, diameter直径） Multi-，poly-：many（multi-purpose） Semi-，demi-，hemi-：half（semi-automatic，demigod半神） Tri-：three（triangle） Uni-， mono-：one（unidirectional单向，monorail单轨铁路）Conversion prefixes转化前缀 a- + v=predictive
9、 adj（asleep,awake） be- + n=v t (befriend待人如友，begrudge嫉妒的) be- + n-ed=adj（bewildered迷惑的） en-，em- + n（adj）=v t usually with words begin with /p,b,m/ (endanger, enrich使充实,empower授权给)Miscellaneous prefixes其他类型前缀 Auto-：self（autobiography自传） Neo-：new，revived（neoclassical新古典主义） Pan-：all，the whole of（pan-continental整个大陆的） Proto-：first，original（proto-fascist主要的法西斯者，proto-horse种马） Vice-：deputy（vice-chairman副主席）Exercise Interested co Trust dis Star mis Literate under Value poly Syllable il disinterested（不感兴趣的） mistrust （不信任） Co-star（联合主演） illiterate（文盲的） undervalue（低估） polysyllable（多音节）Thank you！
