Paul H. Portner is Associate Professor of Linguistics and Director of the Interdisciplinary Program in Cognitive Science at Georgetown University. He is co-editor of Formal Semantics: The Essential Readings (with Barbara H. Partee, Blackwell, 2002) as well as the author of numerous articles on topics such as mood and modality, tense and aspect, and the syntax/semantics interface.
?An excellent book for advanced undergraduates and beginning graduate students. Portner?s approachable, yet serious, presentation gives the reader a firm understanding of the breadth and depth of the science of natural language meaning.? Kai von Fintel, Massachusetts Institute of Technology