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1、Morpheme(词素或语素）-the minimal unit of meaning,-Words are composed of morphemes.A morpheme is a meaning and a stretch of sound joined together.Words may consist of one morpheme or more morphemes,e.g.1-morpheme boy,desire2-morpheme boy+ish,desir(e)+ble,Free morpheme&bound morpheme,Free morpheme-is one t
2、hat may constitute a word(free form)by itself,such as bed,tree,sing,dance,etc.Bound morpheme-is one that may appear with at least one other morpheme.They can not stand by themselves,such as“-s”in“dogs”,“al”in“national”,“dis-”in“disclose”,“ed”in“recorded”,etc.,Allomorph语素变体,Some morphemes have a sing
3、le form in all contexts,such as“dog,bark,cat”,etc.In other instances,there may be some variation,that is,a morpheme may have alternate shapes or phonetic forms.They are said to be the allomorphs of the morpheme,the plural morpheme may be represented by:map-maps sdog-dogs zwatch-watches izmouse-mice aiox-oxen ntooth-teeth sheep-sheepEach of the underlined part is called an allomorph of plural morpheme.,
