Thank you very much for your revision!

I just wanted to know if I can use indirect speech in this rephrase:

Then the poet has doubts about the fate of a fair youth. Will he also undergo the ravages of time since sweet and beautiful creatures don't stay that way forever; they die as fast as they see others grow. (The poet wonders if he will also undergo the..........- is it possible??)

Thank you.

Yes, those ways to phrase the ideas are fine.