requerir Present Conjugation
requerir — to require
Requerir follows an e to ie stem change in all forms except nosotros and vosotros.
requerir Present Forms
When to Use the Present
Use the present tense to discuss ongoing needs, general rules, or what a specific task entails right now.
Notes on requerir in the Present
The 'e' in the stem changes to 'ie' when stressed (requiero, requieres, requiere, requieren).
Example Sentences
Este proyecto requiere mucha paciencia.
This project requires a lot of patience.
él/ella/usted
Yo requiero una respuesta inmediata.
I require an immediate answer.
yo
Nosotros requerimos más información sobre el caso.
We require more information about the case.
nosotros
Common Mistakes
Mistake: Using 'requeremos' for we require.
Correct: The correct form is requerimos.
Why: It is an -ir verb, so the ending for nosotros is -imos, not -emos.
Mistake: Using 'requero' for I require.
Correct: The correct form is requiero.
Why: The verb undergoes an e to ie stem change in the present tense.
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Related Tenses
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).
Imperfect Subjunctive
yo: requiriera
The imperfect subjunctive of requerir uses the 'requir-' stem derived from the preterite third person.
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.