O to U Stem Changes in Spanish Past Progressive Tense

O to U stem changes in the Spanish Past Progressive Tense occur in some -ir verbs when forming the gerund to express ongoing past actions. The ‘o’ in the stem changes to ‘u’ before adding the -iendo ending.

For instance, ‘dormir’ (to sleep) becomes ‘durmiendo’ in the gerund form. This stem change remains consistent when the gerund is used with the imperfect of ‘estar’ to form the Past Progressive.

Synonyms:

  • English: O to U Boot Verbs in Past Progressive
  • Spanish: Verbos de Cambio Radical O a U en Pretérito Imperfecto Progresivo

Related topics:

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Master Spanish Verb Conjugation: Your Ultimate Guide for both Latin American and Castilian Spanish > Master Latin American Spanish Verb Conjugations: Your Key to Conversational Fluency > Spanish Past Progressive Tense Conjugation > Stem-changing Verbs in Spanish Past Progressive Tense > O to U Stem Changes in Spanish Past Progressive Tense

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