41. Combined with the non-past forms, this expresses an imperfective future and a perfective future. 42. The past contrasts perfective and imperfective aspect, and some verbs retain such a contrast in the present. 43. Perfective verbs always used the secondary endings, but did not necessarily have a past-tense meaning.44. These verbs were the perfective verbs, while the ones that did receive a present tense were imperfective. 45. Like the perfective verbs, stative verbs were tenseless, and described a state without reference to time. 46. Boundedness is characteristic of perfective aspects such as the Ancient Greek stative ( " I knew " ). 47. Contrast between a perfective and an imperfective verb may be also indicated by stress, e . g. 48. The eleven primary classificatory " handling " verb stems appear listed below ( in the perfective mode ): 49. This is the perfect stem, and it is used for all of the tenses in the perfective aspect.
