Verbs that spell-change in Preterit Tense

In order to maintain a specific sound, some verbs must change their spelling in the "yo" form of the preterit tense. Verbs that end in -gar add a "u" after the "g" and verbs that end in -car change the "c" to "qu".

Verbs that follow this pattern include "sacar", "buscar", "tocar", "pagar", "llegar" and "jugar."