It is unknown if a sinner is thrown into the Lake of Fire alive or dead, but once there they will quickly die and dissipate into nothingness and be no more.  They will never re-constituent and get out of Hell and be anywhere.  They will forever be gone. Therefore, the sinner is punished forever.  They will never be in God’s presence again or live again.

After judgement at the White Throne Judgement, a sinner receives “stripes” [whipped] and is then thrown into the Lake of Fire.  Even Hell itself is thrown into the Lake of Fire.

Fallen Angels and Satan, himself, are forever punished.  They never have influence, presence, or the ability to affect humans [glorified] or be in God’s presence again.  The books of Enoch, states they are confined in chains in special unpleasant locations [pillars of fire] forever.

Fallen Angels and Satan as well as demons are immortal and live forever, thus, they will always be in the Lake of Fire.  Also fire may not have the same effect on them as on humans and thus they can have some kind of existence forever there.