In the sentence "Alejandro llevó un sueter marrón", the tense being used in the sentence is:
Preterite
The Preterite is a tense is used in Spanish to describe actions completed or finished at at point in the past. It should not be confused with the Imperfect which is used to talk about routines and habits in the past, ( just like "used to" in English)
Examples of Preterite:
Yo compré un carro nuevo el año pasado. ( I bought a new car last year)
This sentence refers to an action that happened at a specific moment in the past. The preterite is used as the simple past in English.
