construir Present Subjunctive Conjugation
construir — build
The present subjunctive of construir uses the 'y' from the 'yo' form: construya, construyas, etc.
construir Present Subjunctive Forms
When to Use the Present Subjunctive
Use this when expressing a desire, doubt, or requirement that something be built (e.g., 'I want them to build...').
Notes on construir in the Present Subjunctive
Because the 'yo' form in the present indicative is 'construyo', that 'y' carries over to all forms of the present subjunctive.
Example Sentences
Espero que construyan el parque pronto.
I hope they build the park soon.
ellos/ellas/ustedes
Es necesario que construyas una base sólida.
It's necessary that you build a solid base.
tú
Common Mistakes
Mistake: Using 'construa' instead of 'construya'.
Correct: construya
Why: The subjunctive is based on the 'yo' form of the present indicative, which includes the 'y'.
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Related Tenses
Present
yo: construyo
In the present tense, construir adds a 'y' before the ending in all forms except 'nosotros' and 'vosotros'.
Preterite
yo: construí
The preterite of construir is irregular in the third person, swapping 'i' for 'y' (construyó, construyeron).
Imperfect
yo: construía
The imperfect of construir is regular, following the standard -ía endings for -ir verbs.
Future
yo: construiré
The future tense of construir is completely regular, using the full infinitive as the stem.
Conditional
yo: construiría
The conditional of construir is regular, adding -ía endings to the infinitive.
Imperfect Subjunctive
yo: construyera
The imperfect subjunctive is based on the preterite 'ellos' form: construyeran.
Affirmative Imperative
yo: construye
The imperative uses 'construye' for 'tú' and 'construya/n' for formal commands.
Negative Imperative
yo: no construyas
The negative imperative always uses the present subjunctive forms: no construyas, no construya.