【正确答案】正确答案：Morpheme is the smallest unit of language in terms of the relationship between expression and content, a unit that cannot be divided into further smaller units without destroying or drastically changing the meaning, whether it is lexical or grammatical. For example, the word chairman is made up of chair and man, townhall of town and hall. Words like boys, checking and disappointment can likewise be further analyzed. They are made up of boy and -s, check and -ing, dis-, appoint and -ment. These smaller components are known as morphemes. But they themselves cannot be further analyzed.(4 points) Morphemes can be sub-classified into different types, depending on what criteria you attempt to follow. Morphemes can be classified into two types, that is, free morphemes and bound morphemes, depending on whether they can occur alone.(2 points)Poly-morphemic words other than compounds may be divided into roots and affixes. Root is the base form of a word that cannot be further analyzed without destroying its meaning. Affix is a collective term for the type of morpheme that can be used only when added to another morpheme, so affix is naturally bound.(2 points)Furthermore, affixes can be divided into inflectional morphemes and derivational morphemes. The former is to add a minute or delicate grammatical function to the stem; while the latter is very productive in making new words.(2 points)

【答案解析】解析：考查语素的定义及分类。语素是最小的语言单位，不能再进一步划分为更小的单位而不破坏或彻底改变其词汇意义或语法意义。根据不同的标准，语素可以分为不同的类型。根据能否单独出现，可以把语素分为自由语素和粘着语素；除复合词以外的多语素词还可以再分为词根和词缀；词缀又可分为屈折词缀和派生词缀。