Resultados posibles:
estabas tarareando
-you were humming
Imperfecto progresivo para el sujeto del verbo tararear.
estabas tarareando
-you were humming
Imperfecto progresivo para el sujeto vos del verbo tararear.

tararear

Escuché que estabas tarareando en el baño de hombres.
I heard that you were humming in the men's room.
Canta esa canción que estabas tarareando.
Sing that song you were humming.
Palabra del día
la guirnalda