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aislar Preterite Conjugation

aislar — to isolate

B1regular with accent changes -ar★★★★
Quick answer:

The preterite of aislar is completely regular: aislé, aislaste, aisló, aislamos, aislasteis, aislaron.

aislar Preterite Forms

yoaislé
túaislaste
él/ella/ustedaisló
nosotrosaislamos
vosotrosaislasteis
ellos/ellas/ustedesaislaron

When to Use the Preterite

Use the preterite for a completed action of isolating something at a specific point in time, such as when a scientist isolated a compound or a person isolated themselves during a trip.

Notes on aislar in the Preterite

Aislar is fully regular in the preterite. Note that unlike the present tense, there are no special accents on the 'i' here.

Example Sentences

  • Aislé el cable con cinta aislante.

    I insulated the cable with electrical tape.

    yo

  • El científico aisló la bacteria ayer.

    The scientist isolated the bacteria yesterday.

    él/ella/usted

  • Nosotros aislamos el problema rápidamente.

    We isolated the problem quickly.

    nosotros

Common Mistakes

  • Mistake: Adding an accent to the 'i' like in the present (aíslé).

    Correct: aislé

    Why: In the preterite, the stress naturally falls on the ending, so the 'i' remains part of the diphthong 'ai'.

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Related Tenses

Present

yo: aíslo

In the present tense, 'aislar' is mostly regular but adds an accent to the 'i' (aíslo, aíslas) in all forms except nosotros and vosotros.

Imperfect

yo: aislaba

The imperfect of aislar is regular: aislaba, aislabas, aislaba, aislábamos, aislabais, aislaban.

Future

yo: aislaré

The future of aislar is regular: aislaré, aislarás, aislará, aislaremos, aislaréis, aislarán.

Conditional

yo: aislaría

The conditional of aislar is regular: aislaría, aislarías, aislaría, aislaríamos, aislaríais, aislarían.

Present Subjunctive

yo: aísle

The present subjunctive follows the accent change of the present indicative: aísle, aísles, aísle, aislemos, aisléis, aíslen.

Imperfect Subjunctive

yo: aislara

The imperfect subjunctive is regular: aislara, aislaras, aislara, aisláramos, aislarais, aislaran.

Affirmative Imperative

yo: aísla

The imperative uses the 'boot' accentuation: aísla (tú), aislad (vosotros), aísle (usted).

Negative Imperative

yo: no aísles

The negative imperative uses the present subjunctive forms: no aísles, no aisléis, no aísle.