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1、将将两个或两个以上独立且语义不同的单词两个或两个以上独立且语义不同的单词合在一起合在一起构成新词的方法称作合成法。构成新词的方法称作合成法。合成名词合成名词afternoon,sportsman,blackboard,newspaper,airplane,classmate合成形容词合成形容词 kind-hearted,middle-aged,hard-working合成副词合成副词 however,maybe合成代词合成代词 himself,everyone,nothing合成动词合成动词 overlookone new compound wordone wordone word+通过通过在
2、词根前面加前缀在词根前面加前缀或或在词根后面加在词根后面加后缀后缀构成一个新词的方法称作派生法。构成一个新词的方法称作派生法。前缀前缀含义含义例词例词 dis-不不 disagree,dislike en-使使处在处在某种状态某种状态 enable,enrich im-,in-不不 impossible,impatient,inexpensive inter-在在之间之间 international,interconnect mis-错误的错误的 mislead,misunderstand non-不，非不，非 non-smoker,non-native re-再，重复再，重复 rewrite
3、,retell un-不不 unable,unhappy,unpopular后缀后缀含义含义例词例词-er,-or构成名词构成名词 teacher,worker,visitor-ian musician-ing building,painting,shopping-ist artist,scientist-ment agreement,government-ness coldness,happiness,illness-th truth,warmth-tioncompetition,education,information-ty activity,safety后缀后缀含义含义例词例词-abl
4、e,-ible构成形容构成形容词词 comfortable,eatable,enjoyable-al environmental,international-ful careful,helpful-ive active,expensive-less careless,helpless,homeless-ly friendly,lovely,monthly-ous dangerous,famous-teen构成数词构成数词eighteen,fifteen,seventeen-thfifteenth,fifth,fortieth-ty forty,sixty,twenty-ly 构成副词构成副词
5、badly,carefully,happily词根词根词缀词缀名词名词形容词形容词副词副词+interestuninterestedinterestinglyuninterestinginterestedinteresting派生规律派生规律 helphelpfullyhelplesslyhelpfulhelpless abledisableunableenableabilitySometimes if you know the meaning of the parts of a word,you can work out the meaning of the whole word.re +n
6、ew +able renewableagain can be can be new again英语中常见的构词法：英语中常见的构词法：1.合成法合成法2.派生法派生法（加前缀、后缀）（加前缀、后缀）课堂检测课堂检测用所给单词的适当形式填空。I like working here because everyone is _(friend).2.Alan is the _(win)of the photo competition this year.3.Mum often tells Linda not to talk to a _(strange).4.My brother,Jim,has be
7、come a _(law).He is very busy every day.5.It was such a _(wonder)movie that all of us enjoyed it.6.It is _(possible)to buy things without money.7.Hamburgers are_(health)food.8.Lets hope that all our troubles will_(appear)soon.9.The local people are_(thank)that the whole nation are helping them rebuild the town.10.He is too _(care)to pass the final exam.1.Review the grammar weve learned today by heart.2.Finish the exercises in Learning English.Homework