oscilar Imperfect Conjugation
oscilar — to fluctuate
Use imperfect forms like 'oscilaba' or 'oscilaban' for ongoing or habitual past actions.
oscilar Imperfect Forms
When to Use the Imperfect
The imperfect is perfect for describing background actions or states in the past that were ongoing or repeated. For 'oscilar', you might say 'El precio oscilaba cada día' (The price fluctuated every day) or 'Mientras caminaba, su cabeza oscilaba' (While he walked, his head swayed).
Notes on oscilar in the Imperfect
Oscilar is regular in the imperfect indicative. The stem 'oscil-' is used with the standard imperfect endings: -aba, -abas, -aba, -ábamos, -abais, -aban.
Example Sentences
El péndulo oscilaba lentamente.
The pendulum was swinging slowly.
él/ella/usted
Antes, los precios oscilaban mucho más.
Before, prices used to fluctuate much more.
ellos/ellas/ustedes
Yo oscilaba entre comprar el rojo o el azul.
I was wavering between buying the red one or the blue one.
yo
Vosotros oscilabais la respuesta.
You all were changing your answer.
vosotros
Common Mistakes
Mistake: Using the preterite 'osciló' for a habitual past action.
Correct: For habitual or ongoing past actions, use the imperfect: 'Antes, oscilaba'.
Why: The preterite is for completed actions, while the imperfect describes continuity or habit in the past.
Mistake: Confusing 'oscilaba' (yo/él/ella/usted) with 'oscilábamos' (nosotros).
Correct: Ensure the correct ending is used for the subject: 'Yo oscilaba', 'Nosotros oscilábamos'.
Why: Each subject pronoun requires a specific verb ending in the imperfect tense.
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Related Tenses
Present
yo: oscilo
Use the present tense like 'oscilo' or 'oscilas' for current actions, habits, or general truths.
Preterite
yo: oscilé
The preterite of oscilar is regular: oscilé, oscilaste, osciló, oscilamos, oscilasteis, oscilaron.
Future
yo: oscilaré
The future tense of oscilar is regular: oscilaré, oscilarás, oscilará, oscilaremos, oscilaréis, oscilarán.
Conditional
yo: oscilaría
Use conditional forms like 'oscilaría' for hypotheticals ('would') or polite requests.
Present Subjunctive
yo: oscile
Use present subjunctive forms like 'oscile' or 'osciles' after expressions of doubt, desire, or emotion.
Imperfect Subjunctive
yo: oscilara
Use imperfect subjunctive forms like 'oscilara' or 'oscilaras' for past wishes, doubts, or hypothetical situations.
Affirmative Imperative
yo: oscila
Use imperative forms like 'oscila' (tú) or 'oscile' (usted) for direct commands.
Negative Imperative
yo: no osciles
Negative commands like 'no osciles' (tú) use the present subjunctive.