concluí

Concluí is a conjugated past-tense form used in both Spanish and Portuguese, representing the first-person singular of the verb meaning “to conclude” or “to finish.” It marks a completed action in the past and appears in narratives and explanations.

In Spanish, concluir is an -uir verb and has irregularities in the pretérito indefinido (preterite). The form for the first person singular is concluí, with an acute accent on the í. The full preterite paradigm is: yo concluí, tú concluiste, él/ella/usted concluyó, nosotros concluimos, vosotros concluisteis, ellos/ellas/ustedes concluyeron. The third-person plural ends with -yeron, as in concluyeron, reflecting the -uir stem changes.

In Portuguese, the equivalent first-person singular is eu concluí, also with a diacritic on the í. The complete pretérito perfeito simples paradigm is: eu concluí, tu concluíste, ele/ela concluiu, nós concluímos, vós concluístes, eles/elas concluíram. Portuguese retains similar stem changes and diacritics across forms in the past tense.

Etymology: both Spanish and Portuguese verbs derive from Latin concludere, from con- (together) plus cludere/claudere (to close), signifying bringing something to a close or finishing it.

Usage notes: concluí denotes a definite, completed action in the past. It is often followed by a statement of findings or decisions, e.g., “Concluí que era necesario.” In contexts requiring ongoing or habitual action, other tenses are used.

See also: concluir (to conclude) in both languages; related tense forms such as the third-person preterite concluyó (Spanish) or concluiu (Portuguese).