se lo he dicho

I've told him/her/you that

→ se
phrase Uncommon #12,044
I've told him/her/you that Used when saying that you have already told someone something. The exact English translation depends on who se refers to and what lo refers to.
SP: Se lo he dicho, pero no me ha escuchado.
EN: I've told him, but he didn't listen to me.

Aunque creo que nunca se lo he dicho.

Although I don't think I've ever told him that.

Nunca se lo he dicho.

I have never told him/her.

— Roma. Ciudad abierta (1945)

No se lo he dicho yo.

I wasn't the one who told him/her.

— Una jornada particular (1977)

Se lo he dicho mil veces.

I've told you a thousand times.

— Uno de los nuestros (1990)

No se lo he dicho?

Didn't I tell him/her?

— El tambor de hojalata (1979)

Se lo he dicho un millón de veces.

I've told you a million times.

Nunca se lo he dicho a nadie.

I've never told anyone.

No se lo he dicho a nadie.

I haven't told anyone.

— Hunting Season (2025)

Se lo he dicho a Tom.

I told Tom.

Sólo que no se lo he dicho a nadie.

Except I haven't told anyone.

— Anaconda (2025)

No se lo he dicho.

I haven't told him.

— Juno (2007)

Yo se lo he dicho todo, ¿no?

I've told him everything, haven't I?

— Las noches de Cabiria (1957)

Se lo he dicho muchas veces.

I've told you this many times.

Sí, se lo he dicho.

Yes, I told him.

Se lo he dicho.

I told him so.