sus métodos

his/her/their methods

→ su
phrase Rare #44,375
his/her/their methods “Sus” is a possessive adjective that can also mean “your” when addressing someone formally. It agrees with the thing possessed, so “métodos” is plural.
SP: El profesor explicó sus métodos a los estudiantes.
EN: The teacher explained his methods to the students.

Sus métodos son anticuados.

His methods are outdated.

Sus métodos ya están pasados de moda.

Their methods are already outdated.

Nuestra escuela adoptó sus métodos de enseñanza.

Our school adopted his teaching methods.