1- Those who are blessed (destined for Paradise) and the people of faith, Allah has decreed that they will not exit from Paradise.
2- Muslims, who mixed good deeds with bad deeds, Allah will admit them to Hell for their sins for a while, then He will bring them out of the Fire and will decree that they will abide for eternity in Paradise after that.
3- If the disbeliever does something that is deserving of reward, he will be rewarded for it in this world, not in the Hereafter.