'Returns a list of possible tenses for the given inflected verb.'

def tenses(self, verb, parse=True):

    tenses = _Verbs.tenses(self, verb, parse)
    if (len(tenses) == 0):
        for prefix in prefix_separable:
            if verb.startswith(prefix):
                tenses = _Verbs.tenses(self, ((verb[len(prefix):] + '    ') + prefix), parse)
                break
    return tenses
