to brush one's teeth
Váyanse a cepillarse los dientes.
Go brush your teeth.
Come antes de cepillarse los dientes.
Eat before brushing your teeth.
Hay que cepillarse los dientes al menos dos veces al día.
You should brush your teeth at least twice a day.
¿Los niños olvidaron cepillarse los dientes antes de ir a dormir?
Did the children forget to brush their teeth before going to bed?