requerir Imperfect Subjunctive Conjugation
requerir — to require
The imperfect subjunctive of requerir uses the 'requir-' stem derived from the preterite third person.
requerir Imperfect Subjunctive Forms
When to Use the Imperfect Subjunctive
Use this for past-tense requirements, hypothetical 'if' scenarios, or polite formal requests regarding what was needed.
Notes on requerir in the Imperfect Subjunctive
The stem changes to 'requiri-' for all persons (requiriera, requirieras, etc.), following the pattern of the third-person preterite.
Example Sentences
Si el plan requiriera más dinero, no podríamos hacerlo.
If the plan required more money, we wouldn't be able to do it.
él/ella/usted
Me pidió que requiriera los documentos originales.
He asked me to request the original documents.
yo
Dudaba que ellos requirieran tanta atención.
I doubted that they required so much attention.
ellos/ellas/ustedes
Common Mistakes
Mistake: Using 'requeriera' with an 'e'.
Correct: The correct form is requiriera.
Why: This tense is built from the preterite 'ellos' form (requirieron), so the 'i' stem must be maintained.
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Related Tenses
Present
yo: requiero
Requerir follows an e to ie stem change in all forms except nosotros and vosotros.
Preterite
yo: requerí
Requerir is a 'slipper verb', changing e to i only in the third-person forms (requirió, requirieron).
Imperfect
yo: requería
The imperfect of requerir is regular: requería, requerías, requería...
Future
yo: requeriré
The future tense of requerir is regular: requeriré, requerirás, requerirá...
Conditional
yo: requeriría
The conditional of requerir is regular: requeriría, requerirías, requeriría...
Present Subjunctive
yo: requiera
Requerir changes its stem from e to ie (requiera) and e to i in the nosotros/vosotros forms (requiramos).
Affirmative Imperative
yo: requiere
The imperative uses 'requiere' for tú and 'requiera(n)' for formal commands.
Negative Imperative
yo: no requieras
The negative imperative uses 'no' plus the present subjunctive forms.