medir Imperfect Conjugation
medir — to measure
Medir is completely regular in the imperfect: medía, medías, medía, medíamos, medíais, medían.
medir Imperfect Forms
When to Use the Imperfect
Use the imperfect to describe a height you used to be, or a repetitive process of measuring things in the past.
Notes on medir in the Imperfect
There are no stem changes in the imperfect. It follows the standard -ía endings for -ir verbs.
Example Sentences
Cuando era niño, medía muy poco.
When I was a child, I was very short (measured very little).
yo
Ellos medían el progreso cada mes.
They used to measure the progress every month.
ellos/ellas/ustedes
Medíamos la nieve todas las mañanas.
We used to measure the snow every morning.
nosotros
Common Mistakes
Mistake: midía
Correct: medía
Why: Learners often try to carry the present tense stem change into the imperfect, but medir is regular here.
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Related Tenses
Present
yo: mido
Medir undergoes an e-to-i stem change in the present: mido, mides, mide, medimos, medís, miden.
Preterite
yo: medí
In the preterite, medir only changes e-to-i in the third-person forms (midió, midieron).
Future
yo: mediré
The future of medir is regular: añadir the endings to the full infinitive (mediré, medirás, etc.).
Conditional
yo: mediría
The conditional of medir is regular: añadir -ía endings to the infinitive (mediría, medirías, etc.).
Present Subjunctive
yo: mida
The present subjunctive of medir uses the 'i' stem change in ALL forms: mida, midas, mida, midamos, midáis, midan.
Imperfect Subjunctive
yo: midiera
The imperfect subjunctive uses the 'midier-' stem for all forms (midiera, midieras, etc.).
Affirmative Imperative
yo: mide
Use 'mide' (tú) or 'midan' (ustedes) to tell someone to measure something.
Negative Imperative
yo: no midas
The negative imperative always uses the present subjunctive forms: no midas, no mida, no midamos, no midáis, no midan.