“…To anticipate, the analysis will claim that perfectivity (more particularly, the perfectivity diagnostics) are sensitive to the existence of a definite event time in Asp, as opposed to an indefinite event time in Asp. 4 Borik (2002), building on proposals by Reinhart, also gives an interpretation of the perfective/imperfective contrast in Russian using a Reichenbachian decomposition into event time E, reference time R and speech time S. This system is completely different from the one I am assuming here, but for completeness this should be clarified, given that Borik (2002) constitutes the most recent formal semantic treatment of the contrast in the literature. First of all, like Giorgi and Pianesi (1997) and Demirdache and Uribe-Etxebarria (2000), all three Reichenbachian positions are taken to refer to times.…”