Both adjectives and possessive adjectives precede the nouns they modify. It has basic word classes of verbs, nouns and pronouns/determiners, adjectives and prepositions. Written languages commonly categorize tokens as nouns, verbs, adjectives, or punctuation. Swedish uses some inflection with nouns, adjectives, and verbs. The genitive occurs with verbs, adjectives, adverbs and prepositions. These have peculiarities not shared with other nouns, adjectives or adverbs. Nouns precede their modifiers, such as adjectives and possessors. These words can modify adjectives but not verbs. Nominals are further divided into nouns, adjectives and pronouns. Interrogative adjectives and interrogative pronouns are declined differently. Comparison forms are usual only for qualitative adjectives and adverbs. Persian frequently uses derivational agglutination to form new words from nouns, adjectives, and verbal stems. Over half of these words are nouns, a quarter adjectives, and a seventh verbs. There is no morphological distinction between adverbs and adjectives. Persian makes extensive use of word building and combining affixes, stems, nouns and adjectives.