Verb Tenses: Koine Greek verb tenses are much more rigid than biblical Hebrew. Present tense is the ongoing Present, continuing indefinitely; the Imperfect is continuing action in past time; the Perfect is completed action that is ongoing, as in Matthew 16:19. I shall give you the keys of the Kingdom of the Heavens, and whatever you would bind upon the Earth will already have been bound in the heavens with ongoing effect, and whatever you would loose upon the Earth will already have been loosed in the heavens with ongoing effect.