Used to vs. Simple Past
Both simple past and used to can be used to describe past habits, past facts and past generalizations; however, used to is preferred when emphasizing these forms of past repetition in positive sentences. On the other hand, when asking questions or making negative sentences, simple past is preferred.
Example: You used to play the piano.- Вы играли на пианино.
Example: Did you play the piano when you were young?- Вы играли на пианино, когда были молоды?
Example: You did not play the piano when you were young.- Вы не играли на пианино, когда вы были молоды.
