The puzzle of English until is well-known. Karttunen 1974 argues that until is ambiguous between a durative and a punctual negative polarity (NPI) meaning. Mittwoch 1977 claims that there is no ambiguity and that the two meanings are due to scope differences: NPI-until is in fact until above negation. Mittwoch’s account relies crucially on the assumption that negation is an aspectual operator that ‘stativizes’ verb meanings (a position recently argued for in de Swart 1996, and de Swart and Molendijk 1999; (...) see also Klima 1964, Seuren 1974, Verkuyl 1993). Thus far, the correct analysis of until remains an open issue. (shrink)