that the most desperate thing you can do is to want time back,
since it impossible to regain something that you can neither give nor receive.
That said,
I desperately wish I could have ( at least ) the past 10 years back.
!! This just in:
wishing is what happens when there is no real possibility;
hope is what you have when there is a chance;
pray is what you do when you don't know which of the previous applies.