vacilar Negative Imperative Conjugation
vacilar — to tease
Use 'no vaciles' (tú) and 'no vacilen' (ustedes) for negative commands, like 'don't tease him!'
vacilar Negative Imperative Forms
When to Use the Negative Imperative
This is for telling someone *not* to do something. For 'vacilar', it means instructing someone not to tease. For example, 'No vaciles a tu hermano pequeño' (Don't tease your little brother). It's always 'no' followed by the present subjunctive form.
Notes on vacilar in the Negative Imperative
Vacilar is regular in the negative imperative, using the standard present subjunctive forms.
Example Sentences
Por favor, no vaciles a tu hermana.
Please, don't tease your sister.
tú
No vacilen a nadie en la escuela.
Don't you all tease anyone at school.
ustedes
No vaciléis a los invitados.
Don't you all (Spain) tease the guests.
vosotros
Common Mistakes
Mistake: Using the infinitive after 'no'.
Correct: 'No vacilar' is incorrect; use 'no vaciles' (tú) or 'no vacilen' (ustedes).
Why: Negative commands use the subjunctive mood, not the infinitive.
Mistake: Forgetting the 'no'.
Correct: Always include 'no' before the verb for negative commands.
Why: The 'no' is essential to signal a prohibition.
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Related Tenses
Present
yo: vacilo
Use the present 'vacilo' (I tease), 'vacilas' (you tease), 'vacila' (he/she/you tease) for current teasing or habitual teasing.
Preterite
yo: vacilé
Use the preterite 'vacilé' (I teased), 'vacilaste' (you teased), 'vaciló' (he/she/you teased) for completed past teasing actions.
Imperfect
yo: vacilaba
Use the imperfect 'vacilaba' (I used to tease) for past habits or ongoing teasing, like 'He always used to tease me.'
Future
yo: vacilaré
Use the future 'vacilaré' (I will tease) and 'vacilará' (he/she/you will tease) for predictions or definite future teasing.
Conditional
yo: vacilaría
Use the conditional 'vacilaría' (I would tease) for hypotheticals, polite requests, or future-in-the-past.
Present Subjunctive
yo: vacile
Use 'vacile' (yo/él/ella/usted) and 'vacilen' (ellos/ellas/ustedes) for wishes, doubts, and emotions, like 'I hope you don't tease me.'
Imperfect Subjunctive
yo: vacilara
Use 'vacilara' or 'vacilase' for past hypotheticals, wishes, or polite requests, like 'If I teased you...'
Affirmative Imperative
yo: vacila
Use the imperative 'vacila' (tú) and 'vacilen' (ustedes) for direct commands like 'tease him!'