Indirect object pronouns in Spanish 2

Le → se before lo/la/los/las — When an IOP (le/les) and a DOP (lo/la/los/las) appear together in the same clause, le/les must change to se: Le lo doy → Se lo doy. Les las mandé → Se las mandé. The form le lo does not exist in Spanish. Always check: if two object pronouns meet and one is le/les, change it to se.

Order: IOP before DOP — When IOP and DOP appear together, the order is fixed: IOP + DOP, before a conjugated verb: Se lo digo, me la mandaron, te los presto. With infinitives or gerunds both attach to the end in the same order: Voy a dárselo, estoy mandándotela.

Se lo clarified by context — Since se is ambiguous (it replaced le which could mean to him/her/you/them), clarify when needed: Se lo dije a ella. Se lo expliqué a los estudiantes. The clarifying phrase is added after the verb and doesn't replace the se — both appear together.