Present tense formula
A tense expressing an action that is currently going on or habitually performed, or a state that currently or generally exists.
Preterite tense formula
In Spanish, the preterite (pretérito perfecto simple, or pretérito indefinido) is a verb tense that indicates that an action taken once in the past was completed at a specific point in time in the past
Imperfect tense formula
imperfect is a verb form which combines past tense and imperfective aspect. It can have meanings similar to the English “was walking” or “used to walk.” It contrasts with preterite forms, which refer to a single completed event in the past.
