Frontmatter -- Introduction -- Part I. Discourse Ontology -- Chapter 1. The Identity of Basic Situations in Discourse. 1. Events as intensional entities -- Chapter 1. The Identity of Basic Situations in Discourse. 2. The delineation of basic situations and constellations -- Chapter 1. The Identity of Basic Situations in Discourse. 3. Denoting, specifying, and restricting basic situations -- Chapter 1. The Identity of Basic Situations in Discourse. 4. Identity of situations across information growth and difference -- Chapter 1. The Identity of Basic Situations in Discourse. 5. Flexibility in choice of identity conditions -- Chapter 1. The Identity of Basic Situations in Discourse. 6. Expressions of identity conditions -- Chapter 1. The Identity of Basic Situations in Discourse. 7. Entities of types (i,e) and (i,s): roles and institutions -- Chapter 1. The Identity of Basic Situations in Discourse. 8. Discussion about alternative ontologies -- Chapter 1. The Identity of Basic Situations in Discourse. 9. Conclusion -- Part II. The Temporal Order: Tense and Aspect in Discourse -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 1. The model of regions and situations -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 2. An overview of Tenses and Aspects -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 3. Speech time, perspective time, reference time, event time -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 4. Commentaries and discussion on the Tense-Aspect system -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 5. Simplifications and reductions from situations to times -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 6. Temporal hypotactic and paratactic constructions -- Chapter 2. The Interaction of Tense, Aspect and Aktionsart. 7. Conclusion -- Chapter 3. Scope-interaction of Tense, Aspect and Nominal Terms. 1. Scope phenomena -- Chapter 3. Scope-interaction of Tense, Aspect and Nominal Terms. 2. Flexible Grammars for handling scopes -- Chapter 3. Scope-interaction of Tense, Aspect and Nominal Terms. 3. Conclusion -- Chapter 4. Summary and Conclusion -- Notes -- References -- Index