初中常用的前缀后缀.ppt

初中英语常见的前缀和后缀常见的否定前缀前缀意义例词un-不，未(=not)unhappy,unnecessary,unexpected,unusual,,相反动作uncover,untie,unlock,undressin-，il-im-，ir-不，非，无incomplete,impossible.impolite,irregular,inability,dis-表示否定表示相反dishonest,disappear,disagreedislike,disbelievemis-表示错、误mistake,misfortune,不幸misunderstanding误解前缀意义例词a-1.在…上/里2.去（to）asleep,along,aloud,alive,across,abroad在国外,aboard在船/火车/飞机上com-,con-,cor-,col-共同，和comment,collect,co-联合、共同co-worker,coexistre-1.再一次，重新2.回，返renew,reborn,rebuild,reappear,returnfore-时间或位置的“在前面”(=before)foresee,foreleg,foretell预言,foreknow预卜pre-在前、事先、预先(before)prepay,prewar,preschool,prehistory前缀意义例词post-时间和顺序的“在后边”(=after)post-war,postgraduateinter-互相(=between,among)interactinternationalmulti-多，多种multinationalmulti-culturalmid-中间(=middle)midday,midnighttele-远television,telegramde-1.否定;2.下;3.强调defeat,decode,decreaseen-使enable,encouragesuper-超级、在之上superpower,superhero前缀意义例词sub-下面的；次subway,subtitlesemi-半semi-final,semiconductor(半导体）vice-副vice-premier,vice-chairmanuni-单uniformbi-双bicyclemulti-多multinationalauto-自动，自主Automobile汽车,automation(自动化）anti-反、防anti-tank,anti-socialex-前ex-president,ex-wifetrans-跨越;移transport,translateimportant重要的→___important不重要的1appear出现→____appear消失2correct正确的→___correct不正确的3lead带领→___lead领错4__lone单独的? ? ___gas防毒气的????5___chart自动图表???? ___operate合作??????6__joy使高兴??????? ___net互联网??????????7___way地铁???????? ___phone电话?????8___use再用?9写出下面单词的前缀找出课文中还有所学词缀的单词说出下列前缀的意思sub-com-pre-mis-im-un-tele-re-en-uni-trans-a-dis-inter-multi-fore-post-表示人和物的名词后缀后缀意义例词表示人-er从事…职业的人teacher,worker,learner-or与-er同义visitor,educator,translator-eer从事于...的人engineer,volunteer,mountaineer-ess女...的actress,waitress,hostess-ian...(专)家/..工作者politician,musician-ist从事...职业/文艺/学