concertar Imperfect Conjugation
concertar — to arrange
The imperfect of concertar is regular: concertaba, concertabas, concertaba, concertábamos, concertabais, concertaban.
concertar Imperfect Forms
When to Use the Imperfect
Use this for ongoing arrangements in the past or to describe the process of getting people to agree on something without a specific end point.
Notes on concertar in the Imperfect
This tense is completely regular. There are no stem changes or irregular endings.
Example Sentences
Antes concertábamos las citas por teléfono.
Before, we used to arrange appointments by phone.
nosotros
El secretario concertaba todas las reuniones del jefe.
The secretary used to arrange all of the boss's meetings.
él/ella/usted
Ellas concertaban el plan mientras yo esperaba.
They were arranging the plan while I was waiting.
ellos/ellas/ustedes
Common Mistakes
Mistake: Adding an accent to all forms (concertába).
Correct: Concertaba
Why: In the imperfect -ar verbs, only the 'nosotros' form carries a written accent (concertábamos).
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Related Tenses
Present
yo: concierto
In the present tense, concertar is a stem-changer where the 'e' becomes 'ie' in all forms except nosotros and vosotros.
Preterite
yo: concerté
The preterite of concertar is completely regular, following the standard -ar pattern.
Future
yo: concertaré
The future tense is regular: add the endings -é, -ás, -á, -emos, -éis, -án to the full infinitive concertar.
Conditional
yo: concertaría
The conditional of concertar is regular: concertaría, concertarías, concertaría, etc.
Present Subjunctive
yo: concierte
The present subjunctive follows the E-to-IE stem change: concierte, conciertes, concierte, concertemos, concertéis, concierten.
Imperfect Subjunctive
yo: concertara
The imperfect subjunctive of concertar is regular based on the preterite stem: concertara, concertaras, concertara...
Affirmative Imperative
yo: concierta
The imperative uses the stem change 'ie' for most commands: concierta (tú), concierte (usted).
Negative Imperative
yo: no conciertes
The negative imperative uses the present subjunctive forms: no conciertes, no concierte, no concertemos.