code: def tenses(self, verb, parse=True):
          
          tenses = _Verbs.tenses(self, verb, parse)
          if len(tenses) == 0:
              # auswirkte => wirkte aus
              for prefix in prefix_separable:
                  if verb.startswith(prefix):
                      tenses = _Verbs.tenses(self, verb[len(prefix):] + " " + prefix, parse)
                      break
          return tenses
docs: Returns a list of possible tenses for the given inflected verb.