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Model Verb traer

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Present 1st Person: traigo

Preterite Endings: e - iste - o - imos - isteis - ieron

Changes: + j  -  + g

Gerund: trayendo

Participle: traído

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Model Verb valer

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Present 1st Person: valgo

Root Changes: val valg  -  valer valdr

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Model Verb vencer

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Changes: co zo  -  ca za  -  cá zá

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Model Verb volver

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Changes: o ue

Participle: vuelto

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Highly Irregular Verbs

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Highly irregular verbs do not follow any particular pattern.