arruinar Present Subjunctive Conjugation
arruinar — to ruin
The present subjunctive of arruinar uses -e endings: arruine, arruines, arruine, arruinemos, arruinéis, arruinen.
arruinar Present Subjunctive Forms
When to Use the Present Subjunctive
Use this when expressing a wish, doubt, or fear that someone might ruin something (e.g., 'I hope you don't ruin it').
Notes on arruinar in the Present Subjunctive
Arruinar is regular in the subjunctive. It uses the stem 'arruin-' plus the standard -ar subjunctive endings.
Example Sentences
Espero que no arruines la fiesta.
I hope you don't ruin the party.
tú
Dudo que ellos arruinen el plan.
I doubt that they will ruin the plan.
ellos/ellas/ustedes
No quiero que arruine mi vestido.
I don't want her to ruin my dress.
él/ella/usted
Common Mistakes
Mistake: arruinas (in a subjunctive context)
Correct: arruines
Why: After expressions of desire like 'Espero que', you must switch the 'a' to an 'e' for -ar verbs.
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Related Tenses
Present
yo: arruino
Arruinar is regular in the present tense: arruino, arruinas, arruina, arruinamos, arruináis, arruinan.
Preterite
yo: arruiné
The preterite of arruinar is regular: arruiné, arruinaste, arruinó, arruinamos, arruinasteis, arruinaron.
Imperfect
yo: arruinaba
In the imperfect, arruinar uses the regular -aba endings: arruinaba, arruinabas, arruinaba, arruinábamos, arruinabais, arruinaban.
Future
yo: arruinaré
The future of arruinar is formed by adding -é, -ás, -á, -emos, -éis, -án to the infinitive.
Conditional
yo: arruinaría
The conditional of arruinar is regular: add -ía, -ías, -ía, -íamos, -íais, -ían to the infinitive.
Imperfect Subjunctive
yo: arruinara
The imperfect subjunctive of arruinar is regular: arruinara, arruinaras, arruinara, arruináramos, arruinarais, arruinaran.
Affirmative Imperative
yo: arruina
The imperative of arruinar uses arruina (tú), arruinad (vosotros), and subjunctive forms for others.
Negative Imperative
yo: no arruines
The negative imperative of arruinar always uses the present subjunctive forms preceded by 'no'.