The Acquisition of Verb Placement : Springer : 9789401052450 : 940105245X : 29 Oct 2012 : other aspects of developing grammars. And this is, indeed, what the contributions to this volume do. Parameterization of functional categories may, however, be understood in different ways, even if one shares the dual assumptions that substantive elements (verbs, nouns, etc. ) are present in all grammars and that X-bar principles are part of the grammatical knowledge available to the child prior to language-specific learning processes. From these assumptions it follows that the child should, from early on, be able to construct projections on the basis of these elements. The role of functional categories, however, may still be interpreted differently. One possibility, first suggested by Radford (1986, 1990) and by Guilfoyle and Noonan (1988), is that children must discover which functional categories (FC) need to be implemented in the grammar of the language they are acquiring. Another possibility,