The grammar of the Polish language is characterized by a high degree of inflection, and has relatively free word order, although the dominant arrangement is subject–verb–object (SVO). There are no articles, and there is frequent dropping of subject pronouns. Distinctive features include the different treatment of masculine personal nouns in the plural, and the complex grammar of numerals and quantifiers.
Certain regular or common alternations apply across the Polish inflectional system, affecting the morphology of nouns, adjectives, verbs, and other parts of speech. Some of these result from the restricted distribution of the vowels i and y, and from the voicing rules for consonants in clusters and at the end of words. Otherwise, the main changes are the following:
Polish retains the Old Slavic system of cases for nouns, pronouns, and adjectives. There are seven cases: nominative (mianownik), genitive (dopełniacz), dative (celownik), accusative (biernik), instrumental (narzędnik), locative (miejscownik), and vocative (wołacz).