Irregular IR Verbs

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Stem Changing IR Verbs (E → IE)

In Spanish in the present tense some IR verbs change when conjugated. The 'e' in the infinitive becomes 'ie'. This does NOT happen in the 'vosotros' and 'nosotros' forms. Derivatives of these verbs follow the same pattern.

Stem changes (E → IE)

When conjugated these IR verbs change from their infinitive form.
The 'e' in the infinitive changes to 'ie' when conjugated.
- E.g. Sentir (to feel) becomes 'siento' (I feel).
- E.g. Siento, sientes, siente, sentimos, sentís, sienten.

Preferir - to prefer

Prefiero - I prefer.
Prefieres - you prefer.
Prefiere - he/she prefers.
Preferimos - we prefer.
Preferís - you (plural) prefer.
Prefieren - they prefer.

Sugerir - to suggest

Sugiero - I suggest.
Sugieres - you suggest.
Sugiere - he/she suggests.
Sugerimos - we suggest.
Sugerís - you (plural) suggest.
Sugieren - they suggest.

Mentir - to lie

Miento - I lie.
Mientes - you lie.
Miente - he/she lies.
Mentimos - we lie.
Mentís - you (plural) lie.
Mienten - they lie.

Advertir - to warn

Advierto - I warn.
Adviertes - you warn.
Advierte - he/she warns.
Advertimos - we warn.
Advertís - you (plural) warn.
Advierten - they warn.

Sentir - to feel

Siento - I feel.
Sientes - you feel.
Siente - he/she feels.
Sentimos - we feel.
Sentís - you (plural) feel.
Sienten - they feel.

Stem Changing IR Verbs (E → I)

In Spanish in the present tense some IR verbs change when conjugated. The 'e' in the infinitive becomes 'i'. This does NOT happen in the 'vosotros' and 'nosotros' forms. The endings follow the usual present tense IR pattern.

Stem changes (E → I)

When conjugated these IR verbs change from their infinitive form.
The 'e' in the infinitive changes to 'i' when conjugated.
- E.g. Pedir (to ask) becomes 'pido' (I ask).
- E.g. Pido, pides, pide, pedimos, pedís, piden.

Servir - to serve

Sirvo - I serve.
Sirves - you serve.
Sirve - he/she serves.
Servimos - we serve.
Servís - you serve.
Sirven - they serve.

Repetir - to repeat

Repito - I repeat.
Repites - you repeat.
Repite - he/she repeats.
Repetimos - we repeat.
Repetís - you repeat.
Repiten - they repeat.

Medir - to measure

Mido - I measure.
Mides - you measure.
Mide - he/she measures.
Medimos - we measure.
Medís - you measure.
Miden - they measure.

Seguir - to follow

Sigo - I follow.
Sigues - you follow.
Sigue - he /she follows.
Seguimos - we follow.
Seguís - you follow.
Siguen - they follow.

Pedir - to ask

Pido - I ask.
Pides - you ask.
Pide - he/she asks.
Pedimos - we ask.
Pedís - you ask.
Piden - they ask.

Stem Changing Verbs (O → UE)

In Spanish in the present tense some IR verbs change when conjugated. The 'o' in the infinitive becomes 'ue'. This does NOT happen in the 'vosotros' and 'nosotros' forms. Derivatives of these verbs follow the same pattern.

Stem changes O → UE

When conjugated these IR verbs change from their infinitive form.
The 'o' in the infinitive changes to 'ue' when conjugated.
- E.g. Morir (to die) becomes 'muero' (I die).
- E.g. Muero, mueres, muere, morimos, morís, mueren.