Either way is correct.
but in mexico it usually goes before and in spain it's usually attached to the end.
A good oneis yo estaba corriendo = I was running as estaba can also be used for he/she was running or when using 3rd person singular él quiere ir a Madrid = He wants to go to Madrid -
Idk if this is it but that’s what showed up when i typed it in on google lol
Si no hay economia no hay humanos
