Current work is on:

Prohibitives and imperatives, modality, negation, Jespersen's cycle, semantic maps, grammaticalization, areal typology, the dialect syntax of Dutch, scalar particles, indefiniteness, impersonal constructions, and raising.

Editing The Handbook or Mood and Modality (Oxford: Oxford University Press), together with Jan Nuyts

Editing Linguistics (Berlin & New York: Mouton de Gruyter)