Yeh Sir !! (3rd)

When I entered to troops, I practiced army language. I couldn't say normal language in troops. I had to say sir behind the sentences. I used to say "I couldn't understand sir," when I was private. I used to say "first class private, Lim Hyeong jun," when I was a first class private. I used to say "I didn't know sir," when I was a corporal. Today, sometimes I say sir behind the sentences. It becomes my habit. I tried to fix my speaking type, but it is really hard. I used to say that for 2 years, so it became my style. If you hear 'sir' end of the sentence, please think that I just came out from the troops.

Thank you!!