Of course we must view the context, a rule of exegesis, to determine when it is being used in some sense as truly forever such as-ISAIAH 9:6- "For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace."
When the term is used to describe a very powerful being such as Jehovah the "Everlasting Father" then we must view it in a literal sense.
The context says it all. When understood from an ancient Hebrew viewpoint, the passages used (containing "forever" and "Earth) by Jehovah's Witnesses to prove a restored Earth throws a wrench into their structured doctrine.