【正确答案】正确答案：Inflectional morphemes manifest various aspects of the grammatical function of a word without changing its grammatical category. They can be used to indicate case and number of nouns, tense and aspect of verbs, and degree of adjectives and adverbs. For example, both "hard" and "harder" are adjectives. The inflectional morpheme"-er"simply indicates a comparative degree. Derivational morphemes are bound morphemes added to existing forms to construct new words. Derivational morphemes are productive but they do not represent any syntactical relation or grammatical categories. For example, the addition of the derivational morpheme" -ness" changes the adjective" happy" to the noun" happiness" ,and the addition of "-hood"changes"brother"into"brotherhood" ,a change in meaning without altering the part of speech.

【答案解析】解析：(考查屈折语素和派生语素)