"Tomorrow she returns to study."
Translation:מחר היא חוזרת ללמוד.
It should probably be accepted but it's a different meaning from the accepted translation. "מחר היא חוזרת ללמוד" = she had studied in the past, then she stopped and tomorrow she will continue studying; it can be used as "she goes back to school tomorrow". "מחר היא חוזרת כדי ללמוד" = she went somewhere, and tomorrow she comes back in order to study.