Conjugate-zar verbs in the preterite tense in Spanish (El Pretérito Indefinido)

Some verbs in Spanish end in -zar. They undergo a consonant change when they are conjugated in the preterite tense.

Learn about -ZAR verbs in  El Pretérito Indefinido in Spanish

Verbs ending in-zar in Spanish, like organizar (to organise), analizar (to analyse), cazar (to hunt) are irregular in El Pretérito Indefinido because the spelling changes for pronunciation reasons in the first person singular (yo).

Conjugation of "organizar" in El Pretérito Indefinido in Spanish

Notice that the -z- is replaced with -c-. However, apart from the yo form, all the other endings are the same as those of regular -ar verbs: -aste, -o, -amos, -asteis, -aron.

Have a look at  and listen to these examples.

Here are some other examples with -z (not-c). Notice how the pronunciation is the same:

For more verbs that follow this pattern see the List of Spanish -zar verbs that change z>c in the preterite for the yo form