Entre los 15 y los 25 años, yo fui (past tense) músico en una orquesta (musician in an orchestra). Mis compañeros y yo fuimos a tocar (past tense) (to play) a varios países. El público siempre fue muy amable con nosotros. Fue una experiencia inolvidable (unforgettable experience) para mí. Esos fueron (plural) los mejores años de mi vida.
Between 15 and 25 years old, I
I was a musician in an orchestra (musician in an orchestra). My colleagues and I went to play (to play) to several countries. The public was always very kind to us.
It was an unforgettable experience (unforgettable experience) for me. Those were the best years of my life.