Could you correct my English? It's been a while since I last played the piano. I can't play a song (or 'the songs') that I used to be able to play. I feel it's important that I continue to play. To maintain or improve something, consistency is key.

Could you correct my English? It's been a while since I played the piano. I couldn't play the song that I used to be able to play. I think it's important to continue doing it. Consistency is key when it comes to maintaining or improving something.