Spelling-Change Verbs

Introduction

Some Spanish verbs change their spelling in certain conjugations — but they're not irregular. The spelling changes exist to preserve the original pronunciation of the consonant. Once you understand the logic, these verbs become completely predictable.

Why Spelling Changes Happen

Spanish spelling rules require certain consonants to change before different vowels to keep the same sound:

• c sounds like /k/ before a, o, u — but /s/ or /θ/ before e, i
• g sounds like /g/ before a, o, u — but /x/ (like "h") before e, i
• z changes to c before e or i (a pure spelling rule)

So when a conjugation puts a different vowel after the consonant, the spelling must adjust.

The Main Spelling Changes

C → QU (before e)

Verbs ending in -car: the c changes to qu before e to keep the /k/ sound.

buscar (to look for) — Preterite yo:

• Busqué un hotel. (I looked for a hotel.)
• NOT: Buscé (this would sound like /s/ or /θ/)

Other -car verbs: tocar, sacar, practicar, explicar, acercar, dedicar

G → GU (before e)

Verbs ending in -gar: the g changes to gu before e to keep the hard /g/ sound.

llegar (to arrive) — Preterite yo:

• Llegué tarde. (I arrived late.)
• NOT: Llegé (this would sound like /x/)

Other -gar verbs: pagar, jugar, apagar, entregar, investigar, navegar

Z → C (before e)

Verbs ending in -zar: the z changes to c before e (Spanish avoids "ze" and "zi").

empezar (to begin) — Preterite yo:

• Empecé a las ocho. (I started at eight.)
• NOT: Empezé

Other -zar verbs: almorzar, comenzar, cruzar, abrazar, organizar, alcanzar

GU → GÜ (before e)

Verbs ending in -guar: add a diaeresis to keep the /gw/ sound.

averiguar (to find out) — Preterite yo:

• Averigüé la verdad. (I found out the truth.)

G → J (before a, o)

Verbs ending in -ger/-gir: the g changes to j before a or o to keep the /x/ sound.

coger (to take/grab) — Present yo:

• Cojo el autobús. (I take the bus.)
• NOT: Cogo (this would sound like /go/)

elegir (to choose) — Present yo:

• Elijo este. (I choose this one.)

Other -ger/-gir verbs: proteger, recoger, dirigir, corregir, exigir

C → Z (before a, o)

Verbs ending in -cer/-cir (after a consonant): the c changes to z before a or o.

vencer (to defeat) — Present yo:

• Venzo al enemigo. (I defeat the enemy.)

Other verbs: convencer, ejercer

I → Y (between vowels)

Verbs ending in -uir: an unstressed i between two vowels becomes y.

construir (to build):

• Construyo una casa. (I'm building a house.)
• Construyó el edificio. (He built the building.)
• Construyeron la escuela. (They built the school.)

Other -uir verbs: destruir, incluir, influir, contribuir, huir, distribuir

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Practice