Dormir is an irregular -ir verb in Spanish — the forms that break the pattern are explained in the grammar notes below.
Practice dormir free →Dormir means 'to sleep', and it is a stem-changing verb GCSE students meet early when describing routine and health. The o changes to ue in the present (duermo, duermes, duerme), and in the preterite the third persons change o to u (durmió, durmieron) — a small but frequently-tested detail. The reflexive dormirse means 'to fall asleep'. Talking about how much you sleep and whether you slept well all draws on this verb, so it is worth getting the stem changes automatic.
Quick facts
Dormir (to sleep) is an irregular -ir verb.
Real sentences across different tenses — the kind of thing you'd actually say or write.
Duermo ocho horas (I sleep eight hours). Note the o→ue change.
The reflexive dormirse: me dormí en el sofá.
Third persons change o→u: durmió, durmieron.
Useful for daily-routine descriptions: when you go to bed, how you slept.
Fixed expressions worth knowing — they come up in listening, reading and writing tasks.
Idiomatic expressions
Dormir is an o→ue stem-changer in the present (duermo, duermes, duerme) but not in nosotros/vosotros (dormimos, dormís). In the preterite, only él and ellos forms change: durmió, durmieron.
Stem-changing (o→ue) in all forms except nosotros and vosotros.
A stem change (o→u) applies in the él and ellos forms only.
The gerund of dormir is irregular: durmiendo (o→u stem change).
Type conjugations from memory and get instant feedback. That's how you actually build the automatic recall the exam needs — not from reading tables.
Practice dormir now →Three questions, no account needed. Type the form, then press Enter or tap Check.
yo: duermo, tú: duermes, él: duerme, nosotros: dormimos, vosotros: dormís, ellos: duermen
Dormir is irregular. The tenses with irregular forms are: Presente, Pretérito Indefinido, Presente Progresivo.
The past participle is dormido (he dormido) and the gerund is durmiendo (estoy durmiendo).
Verbs that are easy to confuse with dormir or that behave like it.
Dormir is on the AQA, Edexcel and Eduqas GCSE Spanish vocabulary lists. Compare the exam boards.
Written by Daniel Holmes for GCSE & A-Level Spanish students.