The study of the linguistic reflexes of aspect has been an active field of research in various sub-disciplines of linguistics, such as syntax, semantics (including discourse theory) and acquisition studies. However, communication and dissemination of results across these various subfields has often been indirect. This volume solves that problem. The different angles brought together here give us a comprehensive picture of the representation of aspect in the mind/brain of the speaker. The papers in this volume represent the results of a workshop on the syntax, semantics and acquisition of aspect held in 2002 whose purpose was to foment active cross-disciplinary communication. A number of the papers examine the syntactic representation of lexical or situation aspect, while others focus on the syntactic interaction of lexical aspect with grammatical aspect, and of grammatical aspect and tense. Other papers examine the role of aspect in discourse representations, while a third group of papers reports on results of empirical studies on the acquisition of aspect in both first and second language acquisition, and patterns of loss of morphosyntactic reflexes of aspect in language attrition. This volume is of interest to researchers and advanced graduate students in syntax, semantics, discourse representation and language acquisition, particularly those working on tense and aspect.