I will keep my favorite toy forever
this sentence is going to be continueing forever until i decide to end it.
This essay is going to take forever.He spends forever in the bathroom.I will love you forever and ever.
I was exaggerating when I said it took forever.
A temporary tatoo will not stay on you forever.
That maze was so puzzling it too me forever to get out
use the word demon in a sentence a very stupid sentence whoever wrote that this a better one the demon was locked up forever
The warmth of my parents's love is something I will remember forever.
A spinning top won't gyrate forever.
The first way you could use cursed in a sentence is "he was forever cursed to a life of pain". If you wish to use it as a swearing type curse a sentence you could use is " he cursed loudly at John"
If you are using it as a character in a sentence who is talking it can work. For example " beware! For what happened on that island will haunt you forever!"
Immortal means undying, living forever. Vampires are said to be immortal.
it depends on what what the sentence is about but somethimes yes