高二英语课件高二英语下学期unit11grammer高二英语课件

Unit11Grammar构词法(WordFormation)英语主要有三种构词法:1.派生(Derivation):2.合成(Compounding):3.转化(Conversion)通过加前缀或后缀构成另外一个词:eg.happy----unhappy(加前缀)----happiness(加后缀)由两个或更多的词合成一个词eg.wood(木)+cut(刻)----woodcut(木刻)由一个词类转化为另一个词类:eg.water(n.)水----water(v.)浇水•invisibledisagreementdishonestyimpossibilitynon-conductorinternationalillogicalreplacementdisappearancemisunderstandingenlargementreconsiderationinteractionunexpectedunforgettableunsuccessfulStep3Remembertheprefix.inter-tele-bio-ex-over-trans-en-mis-re-sub-under-betweenfarbiologyformer/outtoomuchacross/movemakewrongagainUnderbelowdis-non-il-in-im-un-notStep2Matchtheprefixwithitsmeaning.inter-tele-bio-ex-over-un-trans-en-mis-dis-non-re-il-sub-under-in-im-wrongtoomuchagainformer/outunderbetweenbelownotfarbiologymakeacross/moveStudythemeaningofthewords.internationaltelevisioninvisibleimpossibleillogicalirregulardisappearnonsenseunforgettablereplacemisunderstandenlargebiochemistrysubwayex-wifeundergroundoverworktransport•hi-techshowcases展示breakthroughbioengineeringoutstandingenableindirectlystrengthen1.Thisdictionaryenableyoutounder-standEnglishwords.2.Thefencewasstrengthenedwithwire.3.Heinformedusthenewsindirectly.前缀例词a--构成形容词﹑副词asleep,abroad,alonedis-disappear,disagreeen—enlarge,enablein-(il-,im-,ir)invisible,illegalinter-international,inter-schoolmis-mistake,misunderstandre-return,remarrytele-telephone,telescopeun-;non-unfit,unfair,unknownnon-payment(不支付)(否定)(使可能)(相互,之间)（误）(重复,再)(远程)（不）(不,非)后缀例词名词--er…..者runner,swimmer-ese….地方的人Chinese,Japanese-ian精通…的人,…地方人musician,Russian-ist专业人员artist,pianist--ment性质,状态government,movement--ness性质,状态business,happiness--or….者visitor,professor--ion--tion表示动作,过程,结果pollution,suggestion