I will never know what was on your mind at the time

you will never know how much sad when i know You will never know U will never know how much i love U something that you will never know,something that I will never understend.翻译 You will never know that.. I will never say never the one thing I know I will regret if I never say 求翻译, I know I would never I will never back I will never regret I will never leave i will never follow I will never forgive i will never favorites I will never I will never bea i don not know what to do and i will never be with you .翻译 if I let you go,I will never know是什么语法?