"Se" Passive reflexive
Passive reflexive sentences are those sentences introduced by the reflexive pronoun "se" and consist of a subject in third person, singular or plural, and a verb that agrees with it in number. These kind of sentences can only be made from transitive sentences, sentences that use a transitive verb and can be turned into passive sentences, i.e.:Los legisladores aprobaron las reformas. (transitive sentence)
Las reformas fueron aprobadas por los legisladores. (passive sentence)
Se aprobaron las reformas. (passive reflexive sentence)