  In relatively free word order languages, grammatical functions are
intricately related to case marking. Assuming an ordered representation of the
predicate-argument structure, this work proposes a Combinatory Categorial
Grammar formulation of relating surface case cues to categories and types for
correctly placing the arguments in the predicate-argument structure. This is
achieved by assigning case markers GF-encoding categories. Unlike other CG
formulations, type shifting does not proliferate or cause spurious ambiguity.
Categories of all argument-encoding grammatical functions follow from the same
principle of category assignment. Normal order evaluation of the combinatory
form reveals the predicate-argument structure. Application of the method to
Turkish is shown.
