costar Negative Imperative Conjugation
costar — to cost
The negative imperative uses the present subjunctive: no cuestes, no cueste, no costemos, no costéis, no cuesten.
costar Negative Imperative Forms
When to Use the Negative Imperative
Used to tell someone not to let something be difficult or to express 'let it not cost...'.
Notes on costar in the Negative Imperative
Matches the present subjunctive exactly, including the o-to-ue stem change in all forms except nosotros and vosotros.
Example Sentences
No te cuestes tanto trabajo.
Don't let it be so much work for you (Don't struggle so much).
tú
No cueste tanto, por favor.
Don't let it cost so much, please.
Common Mistakes
Mistake: Using 'no cuestas'.
Correct: no cuestes
Why: Negative commands must use the subjunctive ending (-es for -ar verbs).
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Related Tenses
Present
yo: cuesto
In the present tense, costar follows an o-to-ue stem change: cuesto, cuestas, cuesta, costamos, costáis, cuestan.
Preterite
yo: costé
The preterite of costar is regular: costé, costaste, costó, costamos, costasteis, costaron.
Imperfect
yo: costaba
The imperfect of costar is regular: costaba, costabas, costaba, costábamos, costabais, costaban.
Future
yo: costaré
The future of costar is regular: costaré, costarás, costará, costaremos, costaréis, costarán.
Conditional
yo: costaría
The conditional of costar is regular: costaría, costarías, costaría, costaríamos, costaríais, costarían.
Present Subjunctive
yo: cueste
The present subjunctive follows the o-to-ue stem change: cueste, cuestes, cueste, costemos, costéis, cuesten.
Imperfect Subjunctive
yo: costara
The imperfect subjunctive of costar is regular: costara, costaras, costara, costáramos, costarais, costaran.
Affirmative Imperative
yo: cuesta
The imperative of costar uses the stem-changed 'cuesta' (tú) and 'cuesten' (ustedes).