【正文】
inflectional(派生語(yǔ)素,屈折語(yǔ)素) ? Compound (polymorphemic) Morphology (classification) ? Variable word VS. invariable ? variable word: follow follows following followed mat mat ? Invariable word: since when seldom through Morphology (classification) ? Function VS. content ? Function words (grammatical words): Conjunction, prepositions, articles, pronouns ? Content words (lexical words): Nouns, verbs, adjectives, adverbs Morphology (classification) ? Closedcla