составить предложения со словами since 10, ago 10, for 10

Ответ:

He has been playing violin since he was 10 years old (Он играл на скрипке с 10ти лет).

My sister finished school 10 years ago (Моя сестра окончила школу 10 лет назад).

I have been studying Spanish for 10 years (Я изучаю испанский уже 10 лет).