Resultados posibles:
estabas prometiendo
-you were promising
Imperfecto progresivo para el sujeto del verbo prometer.
estabas prometiendo
-you were promising
Imperfecto progresivo para el sujeto vos del verbo prometer.

prometer

Claramente, no te diste cuenta de lo que estabas prometiendo.
Clearly, you didn't realize what you were promising.
Palabra del día
el villancico