英语构词法(Word-formation).ppt

英语构词法(Word-formation),上海市张堰第二中学 卫岑,合成词:有两个或更多的词合成一个词。,派生词:在词根上加上前、后缀构成另外一个词。,兼类词（转化词）:将一种词性转化成另一种词性。,e.g.homework,spaceship,e.g.impossible,worker,e.g.open打开v.开着的adj.,归类:classroom disagree book invitation everyday clean greenhouse watch hopeful,合成词(有两个或更多的词合成一个词):,派生词(在词根上加上前、后缀构成另外一个词):,兼类词/转化词(将一种词性转化成另一种词性):,classroom everyday greenhouse,disagree invitation hopeful,book clean watch,加前缀：happy-unhappy加后缀：enjoy-enjoyable既加前缀又加后缀：health-unhealthy,派生词（derivation）,unluckily,词根,前缀,后缀,前缀改变词义不改变词性后缀改变词性不改变词义,后缀（名词后缀）,后缀（形容词后缀）,后缀（动词后缀）,后缀（副词后缀）,后缀（数词后缀）,rain(形容词)_ agree(反义)_ nation(形容词)_ farm(人)_ recent(副词)_ true(名词)_ hope(形容词)_ home(形容词)_ visit(名词)_ America(形容词)_ comfortable(副词)_,rainy,national,recently,hopeful,visitor,American,disagree,farmer,homeless,truth,comfortably,Practice：,直击中考,涵盖题型：1.用所给词的正确形式填空2.首字母填空,disappear,pollution,useful,Lets hope that all our troubles will _ soon.(appear)（2010）,2.The local people had to move away because of the serious _.(pollute)（2011）,3.It is a very _ book for language learners to improve writing skills.(use)（2011）,4.Jack finds it difficult to pronounce some English words _.(correct)（2013）,真题解析：,correctly,小结（Summary）,合成词:有两个或更多的词合成一个词。,派生词:在词根上加上前、后缀构成另外一个词。,兼类词（转化词）:将一种词性转化成另一种词性。,后缀：名词后缀、形容词后缀、动词后缀、副词后缀等。,前缀改变词义不改变词性后缀改变词性不改变词义,