Resultados posibles:
transportabas
-you were transporting
Imperfecto para el sujeto del verbo transportar.
transportabas
-you were transporting
Imperfecto para el sujeto vos del verbo transportar.

transportar

Esto es lo que transportabas de Nuevo Laredo, ¿no?
This is what you were transporting from Nuevo Laredo, isn't it?
¿Qué era lo que transportabas?
What were you moving?
¿De quién era el dinero que transportabas?
Whose money were you driving?
Palabra del día
la rebaja