I watched TRANSFORMERS at movie theater. Of course in English!!That was great!
And I learned how to use "let".
Sam and his girlfriend have a big mission which to help Prime who a leader of Autobox.
But the mission is really dangerous, so his parents say like "Sam, don't go! you are my son. I can't leave you." And Sam said like "Dad, I have to do it! Let me go!" and finaly his mother said "Let him go."
I think "let" was used like "I hope". So if I said "Let me go." It means like "I want to go" or "I have to go". It is not same meaning but something like that, I guess.

Today's phrase.
"I'm sorry, it's my fault."