español · B1 · grammar · 5 minutes
Why le becomes se
Order two object pronouns without losing who receives what.
Understand the choice
When a sentence replaces both a recipient and a thing, Spanish places the recipient pronoun first and the direct-object pronoun second. The combination le lo or les la is avoided: le or les becomes se, while lo, la, los, or las still identifies the thing.
Core rule: Le and les change to se before lo, la, los, or las; both pronouns stay before the conjugated verb.
Notice it in context
Le envié el informe y se lo expliqué por teléfono.
I sent her the report and explained it to her by phone.
Le envié keeps one indirect pronoun; se lo expliqué replaces both a recipient and a masculine thing.
¿Tienes la llave? Se la di a Ana.
Do you have the key? I gave it to Ana.
La replaces la llave; se replaces le before la.
Los documentos se los mandaremos mañana.
We will send them the documents tomorrow.
Los replaces documentos; se can represent singular or plural recipients.
No se lo cuentes a nadie.
Do not tell it to anyone.
Negative no comes before both pronouns and the verb.
Voy a explicárselo con un ejemplo.
I am going to explain it to him with an example.
Both pronouns attach to the infinitive and the accent preserves stress.
Dímelo otra vez.
Tell it to me again.
In an affirmative command, me + lo attaches as a single pronoun group.
What to remember
- The order is recipient before thing: me lo, te la, se los, nos las.
- Only third-person le or les changes to se before a direct-object pronoun.
- Se does not reveal the recipient’s number, so a clarifying a Ana or a ellos can remain.
Common trap: Do not interpret every se as reflexive. In se lo di, se is the replacement for le or les, and lo is the thing given.