دانشگاه رازی مطالعات زبان‌ها و گویش‌های غرب ایران 2345-2579 14 2 2026 06 22 Case Assignment and Complement Movement in Turkish Postpositional Structures: A Minimalist-Syntactic Analysis Case Assignment and Complement Movement in Turkish Postpositional Structures: A Minimalist-Syntactic Analysis 81 94 4138 10.22126/jlw.2026.12969.1858 FA Shahla Yaghoobi Assistant Professor, Department of Linguistics, Faculty of Persian Literature and Foreign Languages, Payame Noor University, Tehran, Iran. 0000-0003-2212-8016 Journal Article 2025 10 09 This study investigates the syntactic properties of Turkish postpositions within the framework of the Minimalist Program, with particular emphasis on case assignment, complement movement, and the categorical distinction between functional and lexical elements. Drawing on insights from Kornfilt (1997), Cinque (1996), den Dikken (2006), and De Vos (2013), the analysis differentiated between true postpositions, which functioned as syntactic heads and assigned case to their complements, and non-true postpositions, which exhibited morphological possession and behaved as derived nominals. Empirical data from Turkish revealed that movement to the specifier position of the postpositional phrase (Spec, PP) was not triggered by an EPP feature, but rather by linearization requirements at the phonological form (PF) interface. Morphological case—specifically genitive, dative, or ablative—was shown to be a prerequisite for movement and syntactic convergence. In contrast, non-true postpositions formed possessive constructions that lacked functional projection, thereby blocking displacement. These findings support a PF-driven model of movement and reinforce the Strong Minimalist Hypothesis, demonstrating that interface conditions strictly regulate syntactic operations. Turkish postpositions thus fulfill not only semantic roles but also formal syntactic functions. The results carry significant implications for cross-linguistic typology and the analysis of postpositional systems in head-final languages. This study investigates the syntactic properties of Turkish postpositions within the framework of the Minimalist Program, with particular emphasis on case assignment, complement movement, and the categorical distinction between functional and lexical elements. Drawing on insights from Kornfilt (1997), Cinque (1996), den Dikken (2006), and De Vos (2013), the analysis differentiated between true postpositions, which functioned as syntactic heads and assigned case to their complements, and non-true postpositions, which exhibited morphological possession and behaved as derived nominals. Empirical data from Turkish revealed that movement to the specifier position of the postpositional phrase (Spec, PP) was not triggered by an EPP feature, but rather by linearization requirements at the phonological form (PF) interface. Morphological case—specifically genitive, dative, or ablative—was shown to be a prerequisite for movement and syntactic convergence. In contrast, non-true postpositions formed possessive constructions that lacked functional projection, thereby blocking displacement. These findings support a PF-driven model of movement and reinforce the Strong Minimalist Hypothesis, demonstrating that interface conditions strictly regulate syntactic operations. Turkish postpositions thus fulfill not only semantic roles but also formal syntactic functions. The results carry significant implications for cross-linguistic typology and the analysis of postpositional systems in head-final languages. https://jlw.razi.ac.ir/article_4138_42c359b0578cce38bacf62c577aa0b96.pdf