Based on the results from three Event-Related Potential (ERP) studies, we show how the de- gree of grammaticalization of prosodic features influences their impact on syntactic and mor- phological processing. Thus, results indicate that only lexicalized word accents influence morphological processing. Furthermore, it is shown how an assumed semi-grammaticalized left-edge boundary tone activates main clause structure without, however, inhibiting subordi- nate clause structure in the presence of compet- ing syntactic cues
