This is a regular verb. It follows the conjugation pattern of the verb hablar.
PresentPresente
Ese anuncio engaña a los clientes.
That ad deceives the customers.
PreteritePretérito indefinido
El vendedor engañó a mi tío con el precio.
The salesman cheated my uncle on the price.
ImperfectPretérito imperfecto
De pequeño, yo engañaba a mi hermano a las cartas.
As a kid, I used to trick my brother at cards.
Imperfect SubjunctiveImperfecto de subjuntivo
Me dolería que mi mejor amigo me engañase.
It would hurt me if my best friend deceived me.