Book excerpt: This volume is a collection of selected papers originally presented at the XVIth Colloquium on Generative Grammar that was held at the Universidad Autónoma de Madrid. All the papers deal with current issues within the generative framework, mostly paying attention to phenomena pertaining to the syntax-semantics interface. The major concerns are coreference relations, modals and modality, and focus/ellipsis. More specifically, the contributions present research findings from different languages, often adopting a comparative perspective, and include studies on sub-extraction from subjects and objects; on obviation and Control structures; on specificity and Weak Crossover effects; and on reconstruction without movement, as well as papers that address the scopal interactions between tense/aspect and modals; the syntactic and semantic properties of different types of left-periphery operators; and the role focus plays in elliptical constructions.