concertar Negative Imperative Conjugation
concertar — to arrange
The negative imperative uses the present subjunctive forms: no conciertes, no concierte, no concertemos.
concertar Negative Imperative Forms
When to Use the Negative Imperative
Use this to tell someone not to arrange or agree to something.
Notes on concertar in the Negative Imperative
It follows the present subjunctive rules, including the E-to-IE stem change (except for nosotros/vosotros).
Example Sentences
No conciertes nada sin consultarme.
Don't arrange anything without consulting me.
tú
No concertéis la reunión todavía.
Don't arrange the meeting yet (vosotros).
vosotros
No concierte la entrevista todavía, por favor.
Don't arrange the interview yet, please (usted).
usted
Common Mistakes
Mistake: Using 'no concierta' for the tú command.
Correct: No conciertes
Why: Negative commands must use the subjunctive ending -es for -ar verbs.
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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.
Imperfect
yo: concertaba
The imperfect of concertar is regular: concertaba, concertabas, concertaba, concertábamos, concertabais, concertaban.
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).