Morphology (linguistics)
Paradigms and morphosyntax

A linguistic paradigm is the complete set of related word forms associated with a given lexeme. The familiar examples of paradigms are the conjugations of verbs and the declensions of nouns. Also, arranging the word forms of a lexeme into tables, by classifying them according to shared inflectional categories such as tense, aspect, mood, number, gender or case, organizes such. For example, the personal pronouns in English can be organized into tables by using the categories of person (first, second, third); number (singular vs. plural); gender (masculine, feminine, neuter); and case (nominative, oblique, genitive).

The inflectional categories used to group word forms into paradigms cannot be chosen arbitrarily but must be categories that are relevant to stating the syntactic rules of the language. Person and number are categories that can be used to define paradigms in English because the language has grammatical agreement rules, which require the verb in a sentence to appear in an inflectional form that matches the person and number of the subject. Therefore, the syntactic rules of English care about the difference between dog and dogs because the choice between both forms determines the form of the verb that is used. However, no syntactic rule shows the difference between dog and dog catcher, or dependent and independent. The first two are nouns, and the other two are adjectives.

An important difference between inflection and word formation is that inflected word forms of lexemes are organized into paradigms that are defined by the requirements of syntactic rules, and there are no corresponding syntactic rules for word formation.

The relationship between syntax and morphology, as well as how they interact, is called "morphosyntax"; the term is also used to underline the fact that syntax and morphology are interrelated. The study of morphosyntax concerns itself with inflection and paradigms, and some approaches to morphosyntax exclude from its domain the phenomena of word formation, compounding, and derivation. Within morphosyntax fall the study of agreement and government.
startend:quotation, length_constraints:number_paragraphs[6]