costar Conditional Conjugation
costar — to cost
The conditional of costar is regular: costaría, costarías, costaría, costaríamos, costaríais, costarían.
costar Conditional Forms
When to Use the Conditional
Use the conditional to express what something 'would' cost under certain conditions or to make polite speculations.
Notes on costar in the Conditional
Costar is fully regular in the conditional; add the endings directly to the infinitive 'costar'.
Example Sentences
¿Cuánto costaría enviar este paquete?
How much would it cost to send this package?
él/ella/usted
Sin el descuento, las botas costarían el doble.
Without the discount, the boots would cost double.
ellos/ellas/ustedes
Me costaría mucho vivir en otro país.
It would be very hard for me to live in another country.
él/ella/usted
Common Mistakes
Mistake: Using 'cuestaría'.
Correct: costaría
Why: No stem change occurs in the conditional tense.
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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.
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).
Negative Imperative
yo: no cuestes
The negative imperative uses the present subjunctive: no cuestes, no cueste, no costemos, no costéis, no cuesten.