['When my son was 14, he got a black belt in Karate. He had to work hard for that.', 'Wow. You must be proud of him. Congratulations', 'Yes, it has been some years not, but I really was. He was in Karate for 8 years at that time.']
I see. It was many years of work. I guess his classmates were afraid o him, not everybody is black belt so young.
When my son was 14, he got a back belt in Karate. He had to work really hard for that.