Abstract
In this paper, I argue for an analysis that treats the ba construction in Chinese as a case of shape preservation-induced movement structure. Specifically, the robust preverbal adverbial and PP expressions and the mandatory ba-DP movement in ditransitive structures are both derived from a violable head directionality macroparameter under the Symmetrical Syntax Hypothesis, which allows directionality parameters to examine word order throughout the derivation. In addition to being able to capture the parallel syntactic properties of Scandinavian object shift, this account receives further empirical support from word order facts of Archaic Chinese and Bambara.