In Israeli Hebrew, there is no verb "to be" in the present tense, but only in the future and the past tenses. In Biblical Hebrew, there are no tenses but only two aspects: imperfect and perfect. The imperfect is something like the future and the present tenses. The perfect is something like the past tense. Mishnaic Hebrew was spoken as well as Judeo-Aramaic in the time of Jesus and in the time of the Bar-Kokhba revolt (2nd century AD) until the Byzantine Empire of Justinian (6th century AD).