Code switching and the complement/adjunct distinction

Belazi, Rubin, and Toribio (1994) propose two universal syntactic constraints on intrasentential code switching: the Functional Head Constraint, which prohibits switches between functional heads and their complements, and the Word-Grammar Integrity Corollary, which requires all words of a language to obey that language's grammar in code-switching contexts. After rejecting both constraints on empirical as well as conceptual grounds, this article outlines an alternative analysis that relies only on general principles of phrase structure and rejects constraints specific to code switching. The analysis proposed provides strong support for the projection of syntactic structure from the lexicon and the complement/adjunct distinction.