The genitive occurs with verbs, adjectives, adverbs and prepositions. Parts of speech include adjectives, adverbs, numbers, interrogative words, prepositions, conjunctions and interjections. It has basic word classes of verbs, nouns and pronouns/determiners, adjectives and prepositions. These are interjections, conjunctions, subjunctions, prepositions, and adverbs. Pronominal adverbs are used to replace the combination of prepositions with pronouns. Some prescriptive grammar prohibits "preposition stranding"&colon; ending sentences with prepositions. Suffix pronouns are used as markers of possession and as objects of verbs and prepositions. They use basic prepositions, pronouns, and plurals. Typical closed classes are prepositions (or postpositions), determiners, conjunctions, and pronouns. In Quenya there are many similarities in form between prepositions and adverbs. The language uses prepositions and conjunctions. Some words are uninflected and undergo neither process, such as adverbs, prepositions, and interjections. These logograms are used mainly for functional words such as pronouns, articles, prepositions, and conjunctions. Both prepositions and conjunctions could form compounds. Several pronouns further have special forms used after prepositions.