常见前缀：表示否定意义Dis-纯否定Dishonest,dislike,disappear,disagree,disorder,disbelieveIn-,ig-,il-,im-,ir-Incapable,ignoble,impossible,immoral,illegal,irregular(b,p,m前为m)Un-Unable,unemployment,uncomfortable,unequal,unmanned,unfortunateMis-表错误Mistake,mislead,misuse,misunderstand,miscarriage,misconduct,miscountDis-反动作Disarm,disconnect,discourage,disfigure,disroot,dissident,dissentUn-Unload,uncover,unlock,uncap,undoAnti-,ant-相反，相互对立Antiknock,anti-foreign,antitrust,antibody,anticlockwise,anti-depressantOb-,oc-,of-,opObject,obstacle,opponent,oppose,occupyWith-Withdraw,withstand,withholda-,ab-,abs-分离，离开Away,apart,abstract,absent,abduct,absolve,abdicateDis-,di-,dif,Disarm,disfigure,disbud,disburden,dissect,distract,dispelEx-,e-Excise,exclude,expatriate,expelSe-Separate,seduce,select,secede,segregate,seclude二、表时空关系En-空:在内，进入空:encage,engulf,encase,encave,enrollEx-,ec-,es-空:外部，在外时:先，故，旧空:export,exit,expand,expose,exclude,extract,expel时:expresident,ex-president,ex-soldierFore-空:在前面时:在前，先前空:forehead,foreground,forearm,forefoot时:foretell,foreknow,foreword,foresee,forerunIn/m/l/r-空:在内，向内空:inland,invade,import,infuse,income,inject,influx,ingressInter-,intel-空:在..之间，相互空:international,interaction,internet,interrupt,interject,interlineOut-空:在上面，在外空:outline,outside,outlander,outflow,outcast,outpour,outrushOver-空:在上面，向上空:overlook,overhead,overboard,overbridge,overfly,overleapPost-空:向后，在后面时:在后，后空:postscript,postpone,postdate时:postwar,post-liberation,Pre-空:在前，在前面时:在前，事先空:prefix,preface,preposition时:prewar,prehistory,premature,precedent,prepayPro-空:在前，向前时:在前，预先空:progress,proceed,project,propel,promote,protrude时:prologue,prophetSub/c/f/g/M/p/r/s空:在下面，下空:subway,subsurface,subsoil,submarine,substandardTrans-空:从一处至另一处空:transplant,transform,transmigrate,transgress,transportUnder-空:在下，向下空:underline,underwater,underwrite,underlay,undercurrentUp-空:在上，向上空:upward,uphill,upholdRe-再一次，重新一次回Rewrite,restart,resell,reconstruction,rearm,rebirthReturn,recall,rebound,reflect,reclaim,retreat,regress,