Direct answer: use olvidé when the person is the subject and the forgotten thing is the direct object: Olvidé la reunión. Use me olvidé de when you mean "I forgot about/to" something: Me olvidé de enviar el correo. Use se me olvidó when it slipped your mind and the forgotten thing becomes the subject: Se me olvidó la reunión.
This matters because English gives you one easy phrase, "I forgot," while Spanish gives you several sentence shapes. To stop guessing, ask who is the subject, where de belongs, and whether the sentence should sound direct or accidental.
The three-way check
Before you type "I forgot" in Spanish, run this quick check.
- Am I directly saying I forgot something? Use olvidé: Olvidé la contraseña.
- Am I saying I forgot about something or forgot to do something? Use me olvidé de: Me olvidé de la cita, me olvidé de llamar.
- Did it slip my mind? Use se me olvidó or se me olvidaron: Se me olvidó la cita, se me olvidaron las llaves.
Olvidé, me olvidé de, and se me olvidó in real messages
| English thought | Spanish shape | Example | Why it works |
|---|---|---|---|
| I forgot the password. | Olvidé + object | Olvidé la contraseña. | You are the subject; the password is the direct object. |
| I forgot about the meeting. | Me olvidé de + noun | Me olvidé de la reunión. | Olvidarse uses de before the thing forgotten. |
| I forgot to reply. | Me olvidé de + infinitive | Me olvidé de responder. | The action you forgot is introduced by de. |
| The meeting slipped my mind. | Se me olvidó + singular thing | Se me olvidó la reunión. | The meeting is the grammatical subject. |
| I forgot the keys. | Se me olvidaron + plural thing | Se me olvidaron las llaves. | Llaves is plural, so the verb is plural. |
Do not turn this into an "intentional vs accidental" myth
Learners often hear that olvidé means you forgot on purpose and se me olvidó means it was accidental. That is too rigid. The safer distinction is grammatical and tonal:
- Olvidé la reunión is direct: I forgot the meeting.
- Me olvidé de la reunión frames it as forgetting about the meeting.
- Se me olvidó la reunión frames it as something that slipped my mind.
In casual apologies, se me olvidó often feels softer because it puts the forgotten thing in the subject position and you in the affected-person position.
Watch the de after me olvidé
Careful written Spanish keeps de after olvidarse: Me olvidé de que era hoy, me olvidé de dónde puse el archivo, me olvidé de enviar el mensaje. You may hear people drop de in speech, but in a work message, school assignment, or public post, keeping it is safer.
A 12-minute typing loop
- Write six real "I forgot" lines. Use messages you might actually send: password, meeting, reply, keys, attachment, birthday.
- Mark the subject. If you are the subject, try olvidé or me olvidé de. If the forgotten thing is the subject, try se me olvidó.
- Check for de. After me olvidé, add de before a noun, infinitive, or clause.
- Check singular or plural. Type se me olvidó el archivo but se me olvidaron los archivos.
- Retype tomorrow. Change only the noun so the pattern transfers: la cita, el pago, los documentos.
If small pronouns are the bigger bottleneck, pair this with the Spanish se pronoun loop, the me, mi, and mí role check, and Spanish indirect-object doubling.
FAQ
Is se me olvidó correct Spanish?
Yes. In this construction, the forgotten thing is the subject and the person who forgets is expressed with an indirect object such as me, te, or le.
Should I write se me olvidó or se me olvidaron?
Match the verb to the forgotten thing. Use se me olvidó el correo for one thing and se me olvidaron los correos for more than one.
Is me olvidé que wrong?
It is common in casual speech, but careful Spanish recommends keeping de: me olvidé de que era hoy.
Can I just use olvidé?
Often, yes. Olvidé la reunión is understandable and grammatical. Learn the other shapes because they let you sound more natural in apologies, reminders, and everyday messages.
Evidence notes
- Current learner-demand signal: an April 2026 r/SpanishLearning thread about "unknown Spanish rules" included se me olvidó as a natural-sounding pattern that learners notice late: What are some unknown Spanish rules that made a difference?
- Recurring learner confusion: an r/Spanish thread asks learners to sort the several grammatical ways to use olvidar and olvidarse, including olvidé, me olvidé de, and se me olvidó: Olvidar, olvidarse and the grammatical ways to use them.
- Grammar reference: RAE's Diccionario panhispánico de dudas lists transitive olvidar, pronominal olvidarse de, and olvidársele algo a alguien, and recommends keeping de in careful speech and writing: RAE: olvidar(se).
- Pronoun-writing reference: RAE's orthography guide uses Se me ha olvidado as an example of unstressed pronouns written separately before a verb: RAE: pronombres personales átonos.
- Practice-design note: the typing loop uses retrieval practice because research summaries from Carnegie Mellon and the original testing-effect literature describe retrieval as a learning activity, not only an assessment: Carnegie Mellon: Retrieval Practice.