"Forgive Me" falls into so many categories that this is to dificult.
"Forgive Me" (do you?)
"Forgive Me" (will you?)
"Forgive Me" (can you?)
in english you use context and tone of voice to make yourself understood.
It's the same in welsh.
take the first one
dych chi'n maddau i fi? (when you upset your boss)
ti'n maddau i fi? (when you upset your child)

or like I say to my wife
Dych chi ddim wedi maddau i fi, te?