In recent years, we have witnessed, on the one hand, an increased interest in cross-linguistic data in formal semantic studies, and, on the other hand, an increased concern for semantic issues in language typology. However, only few studies combine semantic and typological research for a particular semantic domain (such as the papers in Bach et al. (1995) on quantification and Smith (1997) on aspect). This book brings together formal semanticists with a cross-linguistic perspective and/or those working on lesser-known languages, and typologists interested in semantic theory, to discuss semantic variation in the specific domain of Tense, Aspect, and Mood/Modality.