v (intransitive|monopersonal|inessive or adessive + 3rd-pers. sg. + an adverb) to happen, go (with the subject "it")
v (context|an adjective in partitive singular, or "mitä" in a question + 3rd-pers. sg. + allative) to happen (to something)
v (transitive) Used in very many collocations with nouns and with more or less idiomatic value, translated often into "engage in", "have", "do", "transact" , "pursue", "keep up", "maintain" etc.