The grammar of the Kashubian language is characterized by a high degree of inflection, and has relatively free word order, although the dominant arrangement is subject–verb–object (SVO).
Distinctive features include the different treatment of masculine personal nouns in the plural, and the complex grammar of numerals and quantifiers.
Kashubian has a rich system of inflectional morphology, akin to that of other Slavic languages, including case, number, gender, tense, aspect, and mood.
Some nouns are both masculine and feminine depending on the gender of the referent, e.g., kaléka (crippled person).
The comparative degree is formed by adding -szi or sometimes -ejszi/-észi if the stem ends with two consonants, however -szy can also appear in the same conditions.
[29] Kashubian verbs agree for person, tense, aspect, and have participle forms as well as gerunds.
The first person plural imperative (the so-called hortative is formed the same way and -më is added.
[33][34] When perfective verbs are inclined according to present endings, a future tense is formed.
[37][38] The most common, modern way is to take a past tense form with a pronoun or noun.
[42][44] The infinitive ending is -c.[42] The active adverbial participle formed with -ąc (more common -ącë) is uncommon in spoken Kashubian, appearing more in literature.