Jesus gave an example of the sufferings of the unrepentant when He spoke these words.
LDS scripture
Doctrine and Covenants 19: 16-18
16 For behold, I, God, have suffered these things for all, that they might not suffer if they would repent
17
But if they would not repent they must suffer even as I;
18
Which suffering caused myself, even God, the greatest of all, to tremble because of pain, and to bleed at every pore, and to suffer both body and spiritand would that I might not drink the bitter cup, and shrink
I agree that Hell is everlasting, but at some point Jesus Christ will redeem all, not necessarily into heaven, but into a world of a lesser degree of happiness, according to their works and beliefs.
I suppose not ever having the opportunity to live with God and enjoy all the happiness and blessings He has to offer would be an everlasting punishment of sorts, if that were to be a persons final state of existence in which he or she were consigned to. The thought that you could have lived with God and enjoyed all of His blessings, but chose not too, would be an everlasting punishment in itself. We affix our own everlasting state of misery by listening to the father of lies, who was a liar from the beginning. .
Our own scriptures talk of a state of misery and endless torment from wence there is no return, but that doesn't necessarily mean one has to be in hell to experience this, but in a world of a lesser degree of happiness than heaven no doubt.
You don't have to be in hell for eternity to experience the pains of hell. I'm sure it's possible to experience the pains of hell before going there and after being redeemed from it. I know I've felt the pains of hell to a small degree and so have many others. Many are in a state of misery feeling the pains of hell right now on this earth. We need to pray for these individuals.
Book of Mormon
Mosiah 3: 25
25
And if they be evil they are consigned to an awful view of their own guilt and abominations, which doth cause them to shrink from the presence of the Lord into a state of misery and endless torment, from whence they can no more return; therefore they have drunk damnation to their own souls.