I have worked on various topics in the philosophy of language and epistemology, and more recently, in metaphysics and the philosophy of action. Right now I am working on two projects.

The first, coauthored with David Boylan, is about the semantics of the perfective aspect. We give a new theory of the perfective aspect. Our theory explains why the perfective aspect combines easily with all eventive verb phrases, but only with a few special stative verb phrases, such as 'able'. The theory also explains why, when 'able' does combine with the perfective aspect, it receives a special 'actuality-entailing' interpretation.

The second project is a short book, coauthored with Nathaniel Baron-Schmitt, about what we call progressive action: what is it to be in the process of doing something intentionally, such as crossing the street or cutting a tomato? In Part I, we defend certain core principles governing progressive action sentences (sentences of the form 'S is Ving'). In Part II, we evaluate Michael Thompson's famous claim that intention is continuous with progressive action: to intend to V is to be in some (perhaps very early) stage of progressive action. We argue, on the basis of the principles defended in Part I, that Thompson's view must be rejected. In Part III, we consider which parts of Thompson's Naive Action Theory can be retained, and which must be given up, in light of our objections in Part II.