THE ACQUISITION OF SPANISH: MORPHOSYNTACTIC DEVELOPMENT IN MONOLINGUAL AND BILINGUAL L1 ACQUISITION AND ADULT L2 ACQUISITION. Silvina A. Montrul. Amsterdam: Benjamins, 2005. Pp. xvi + 413. $150.00 cloth, $49.95 paper.

This book presents and analyzes the morphosyntactic development of Spanish in monolingual and bilingual first language (L1) acquisition and in adult SLA. Based on the principles and parameters model of generative grammar, the book addresses the nature of linguistic knowledge and examines the development of grammatical aspects such as morphology, syntax, and lexical semantics in monolingual, bilingual, and second language (L2) learners. The author argues that the underlying linguistic competence of L1 and L2 speakers is constrained by the nature of the language the learners entertain, as guided by principles of Universal Grammar. Throughout the book, the author considers different approaches concerning the nature and development of linguistic knowledge such as the continuity hypothesis—including both weak and strong versions—(Pinker, 1989), the maturation hypothesis (Radford, 1990), and the no continuity view. The author supports the continuity hypothesis by arguing that principles and parametric options continue to be available throughout the acquisition process in the monolingual, bilingual, and adult grammatical systems. In other words, the author argues that linguistic representation is fundamentally similar among the grammars of child L1, child bilingual, and adult L2 learners, and that all of these are similar to the adult target grammar.