"The Proper Treatment of Events" offers a novel approach to the semantics of tense and aspect motivated by cognitive considerations. offers a new theory of the semantics of tense aspect and nominalizations that combines formal semantics and cognitive approaches written accessibly for students and scholars in theoretical linguists, as well as in philosophy of language, logic, cognitive science, and computer science accompanied by a website at (http: //staff.science.uva.nl/ michiell/) that provides slides for instructors and background material for students