language-specific competence within the acquisitional process. Together with the focus on acquisition of the verb and its grammar research in this domain provides a fruitful basis for discussion. The maturation model of language acquisition assumes that UG becomes the language specific grammar over time and that UG is entirely available only up until the time when the native language has been completely acquired (cf. Atkinson 1992, Wexler 1999). Constructivist models that may also be opposed to theories of UG alongside with the usage- based approaches m- tioned above mostly elaborate on the...