Periodo de tiempo específico: usamos pretérito perfecto (specific period of time: we use preterite)
Cuando hablamos de un periodo de tiempo e indicamos cuándo empezó y cuándo terminó, utilizamos pretérito perfecto. Normalmente usamos las preposiciones entre (between) o de/a (from/to) para delimitar el periodo de tiempo.
💂 When we talk about a period of time and we indicate when it started and when it ended, we use preterite. We usually use the prepositions entre (between) or de/a (from/to) to delimit the period of time.
Entre 1999 y 2005 viví en Toronto. (Between 1999 and 2005 I lived in Toronto.)
De 2010 a 2013 no comí carne. (From 2010 to 2013 I did not eat meat.)
Rereading feels productive but fades fast. What actually works is closing the page and trying to recall what you just learned. The effort of reconstructing knowledge from memory is what makes it stick.