behaves well
Only if she behaves.
Your son is behaving well.
Maryam se porta bien.
Maryam is behaving well.
Se porta bien en la escuela, pero en casa causa problemas.
He behaves well at school, but causes problems at home.
Si no se porta bien, no quiero que vuelva por aquí.
If he doesn't behave, I don't want him coming back here.
— Haz lo que debas (1989)