A postpositional phrase consists of a noun phrase followed by a postposition. The postposition is the head of the phrase, and the noun phrase is its complement. Turkish has no prepositions, but a large number of postpositions, which follow their complements. Turkish postpositions fall into two main categories: bare postpositions, which carry no suffixes, and possessive-marked postpositions, which are marked by a possessive suffix agreeing with the complement, and an oblique case marker. Possessive-marked postpositions can be divided into two groups, which differ in respect of whether, or under what circumstances, their complements take genitive case marking, and whether their own case marking is variable or fixed. The range of syntactic functions that can be performed by a postpositional phrase depends upon the postposition that heads it. There are three possible functions: adverbial, adjectival, predicative.