To this end, a novel concept of a scale of change is adopted, building on a bottom-up idea of associating scales with events and characterising verbal predicates via event-level scales. As a crucial departure from former scale-based approaches, predicates like "arrive" are associated with both two-valued and multi-valued scales of change. The new framework can then capture fine-grained aspectual class differences and predict the interpretations of the progressive for different aspectual classes.