grammar.pronouns.double-object-se
Se lo, se la: le + lo becomes se lo
When le/les meets lo/la/los/las, the indirect pronoun turns into se: se lo dije, se las mandé.
grammarB1v0.1.0
Explication
Spanish refuses two l-pronouns in a row: le lo → se lo. Order is fixed: indirect before direct — se lo di, se la presté, se los enviamos.
Because se covers le and les alike, a él / a ella / a ustedes is often added for clarity: se lo expliqué a ella.
Exemples
¿El informe? Se lo mandé ayer.
The report? I sent it to him/her yesterday.
The report? I sent it to him/her yesterday.
Région: global
Se las devolví a tus padres.
I returned them to your parents.
I returned them to your parents.
Région: global