Board Thread:Bible Games/@comment-31246436-20161025190507/@comment-1777104-20161105001827

Matt. 16:28 (Mark 9:1; Luke 9:27) is referring to the Transfiguration, a foretaste of the glory of the coming Heavenly Kingdom.
Matt 23:36 (Mark 13:20; Luke 21:32) is referring to the judgment coming to Jerusalem in AD 70.
Mark 24:34 refers to the general destruction coming to unbelievers as typified by the Jewish leadership of his day.  In this context, the natural sense of the verse parallels that in 23:36.  However, given the previous paragraph about the coming Son of Man, this presents an interpretive challenge.  If taken as earlier, then Jesus must have in some way "returned" with the destruction of the Jewish system of reiligion of his day.  Otherwise, the fulfilment will come before the ethnic Jews went extinct; or perhaps "this generation" means "this sort of people."  In this case, Jesus is assuring his listeners (and readers) that evil will continue until He comes back in judgment.