sumar Present Subjunctive Conjugation
sumar — to add
The present subjunctive of sumar (sume) is used after expressions of doubt, desire, or emotion.
sumar Present Subjunctive Forms
When to Use the Present Subjunctive
You'll use the present subjunctive of sumar after phrases that express doubt, desire, emotion, or uncertainty. For example, 'Dudo que sumes bien los números' (I doubt you add the numbers correctly) or 'Espero que sumemos fuerzas' (I hope we add our strengths).
Notes on sumar in the Present Subjunctive
Sumar is regular in the present subjunctive. All the forms follow the standard pattern for -ar verbs.
Example Sentences
Espero que sumes todos los puntos.
I hope you add all the points.
tú
Quiero que sumemos nuestras ideas para resolver esto.
I want us to add our ideas to solve this.
nosotros
No creo que sumen los gastos de envío.
I don't think they add the shipping costs.
ellos/ellas/ustedes
El profesor pide que sume los resultados con cuidado.
The teacher asks that he add the results carefully.
él/ella/usted
Es importante que suméis vuestra experiencia.
It's important that you all add your experience.
vosotros
Common Mistakes
Mistake: Using the present indicative instead of the present subjunctive.
Correct: Use 'Dudo que sumes...' not 'Dudo que sumas...'.
Why: Expressions of doubt, denial, or uncertainty trigger the subjunctive mood.
Mistake: Forgetting that the subjunctive is needed after certain conjunctions and phrases.
Correct: Remember phrases like 'espero que', 'dudo que', 'es necesario que' require the subjunctive.
Why: These trigger phrases signal that the following verb should be in the subjunctive mood.
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Related Tenses
Present
yo: sumo
The present of sumar is regular: sumo, sumas, suma, sumamos, sumáis, suman.
Preterite
yo: sumé
The preterite of sumar is regular: sumé, sumaste, sumó, sumamos, sumasteis, sumaron.
Imperfect
yo: sumaba
The imperfect of sumar is regular: sumaba, sumabas, sumaba, sumábamos, sumabais, sumaban.
Future
yo: sumaré
The future of sumar is regular: sumaré, sumarás, sumará, sumaremos, sumaréis, sumarán.
Conditional
yo: sumaría
The conditional of sumar is regular: sumaría, sumarías, sumaría, sumaríamos, sumaríais, sumarían.
Imperfect Subjunctive
yo: sumara
The imperfect subjunctive of sumar (sumara/sumase) is used for past hypotheticals or polite requests.
Affirmative Imperative
yo: suma
The imperative of sumar is regular: suma, sume, sumemos, sumen, sumad.
Negative Imperative
yo: no sumes
The negative imperative of sumar uses the present subjunctive: no sumes, no sume, no sumemos, no sumen, no suméis.