Tenga en cuenta que la forma pasada es idéntica a la forma base del verbo.
backnoun
backs
espalda (de un ser humano), lomo (de un animal); respaldo (de una silla), espalda (de ropa); reverso, dorso, revés; fondo, parte de atrás; defensa (en deportes)
Ejemplos de uso de
back
noun
•She was carrying her little daughter on her back.
•She has a pain in the small of her back.
•I slapped him on his back to congratulate him.
•She stabbed him in the back.
•He was handcuffed with his hands behind his back.