To provide a detailed explanation and translation of the sentences from Russian to British English, here's the step-by-step translation:
Когда я была ученицей, я часто ходила в парк с родителями.
- When I was a pupil, I often went to the park with my parents.
Раньше у нее были короткие волосы, а теперь до плеч.
- She used to have short hair, but now it's shoulder-length.
Раньше он играл в хоккей, но теперь не играет.
- He used to play hockey, but he doesn't play now.
Когда она была ребёнком, она ела много конфет.
- When she was a child, she ate a lot of sweets.
Когда мне было 6 лет, я читал много книг.
- When I was 6 years old, I read a lot of books.
Мой брат не ходил в театр, когда был моложе.
- My brother didn't go to the theatre when he was younger.
Each sentence represents a past habit or state, typically translated using "used to" or the simple past tense to capture the idea of past habits or states no longer applicable.