This is an irregular verb. It follows the conjugation pattern of the verb poner.
PresentPresente
En invierno me pongo un abrigo grueso.
In winter I put on a thick coat.
PreteritePretérito indefinido
Marta se puso un vestido rojo para la fiesta.
Marta put on a red dress for the party.
Negative ImperativeImperativo negativo
Por favor, no te pongas esa camisa sucia.
Please don't put on that dirty shirt.