Some irregular verbs in the simple past tense

In the simple past (pretérito indefinido), verbs ending in -zar are irregular with the pronoun yo (I) and regular with all other pronouns.

Empezar → Empe.

(to start → [I] started)

Alcanzar → Alcan.

(to reach → [I] reached)

This is how they're conjugated:

Empezar en
Yo empecé
Tú empezaste
Él/ella/usted empezó
Nosotros/as empezamos
Vosotros/as empezasteis
Ellos/ellas/ustedes empezaron
Alcanzar en
Yo alcan
Tú alcanzaste
Él/ella/usted alcan
Nosotros/as alcanzamos
Vosotros/as alcanzasteis
Ellos/ellas/ustedes alcanzaron
Rechazar en
Yo recha
Tú rechazaste
Él/ella/usted recha
Nosotros/as rechazamos
Vosotros/as rechazasteis
Ellos/ellas/ustedes rechazaron

Empecé a leer un nuevo libro.

I started reading a new book.

Rechacé la propuesta.

I turned down the proposal.

Other verbs that follow this pattern are: abrazar (to embrace), utilizar (to use), realizar (to realize), almorzar (to have lunch) and finalizar (to finish).

Almorcé ayer con Betty almorzar, pret. indefinido.

I had lunch with Betty yesterday.

Finalicé el proyecto finalizar, pret. indefinido. 

I finished the project.

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