Guía de Supervivencia
Preterite vs. Imperfect
The A2 Past Tense Survival Guide
Change how you think about time — bilingual overview, tricks, and exercises.
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PART 1 — The Core Concept (El concepto principal)
To choose the right past tense in Spanish, you have to change how you think about time. It is not just about when something happened, but how it happened.
- 📸 The Preterite is a Snapshot: It tells you exactly when something happened and focuses on completed actions with a clear beginning and a clear end. Think of it as a closed chapter in a book.
- 🎥 The Imperfect is a Video: It describes ongoing situations, how things were in the past, or background music with no definite ending.
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PART 2 — Comparison Chart (Cuadro de Comparación)
| Feature |
📸 Pretérito Simple (Indefinido) |
🎥 Pretérito Imperfecto |
| Main Use |
Completed actions, specific events, and closed chapters. |
Habits ("used to"), ongoing actions, background descriptions, age, and time. |
| English Equivalent |
Simple past ("-ed", "did", "went") |
"Used to...", "Was / Were -ing..." |
| Time Markers (Marcadores) |
Ayer (yesterday), anoche (last night), el año pasado (last year), hace un año (a year ago). |
Siempre (always), todos los días (every day), frecuentemente (frequently), cuando era niño (when I was a kid). |
| Example (Ejemplo) |
Ayer, yo comí pizza con mi familia.
(Yesterday, I ate pizza with my family) |
Todos los sábados, nosotros íbamos a la biblioteca.
(Every Saturday, we used to go to the library) |
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PART 3 — Tips to Differentiate Them (Trucos para saber diferenciarlos)
Here are the best tricks to know exactly which tense to use in any situation:
💡 Tip 1: The "Used to" or "Was -ing" Test
Translate your thought to English. If you can say "used to [verb]" or "was/were [verb]-ing" naturally, you **must** use the Imperfect.
- Example: "I used to play soccer" ➔ Yo jugaba fútbol. (Imperfect)
- Example: "She was reading" ➔ Ella leía. (Imperfect)
💡 Tip 2: The "Interruption" Rule (Working Together)
Very often, these two tenses appear in the same sentence! Use the Imperfect for the background action (what was already happening), and use the Preterite for the sudden action that interrupts it.
- Example: Yo leía un libro (Imperfect/Ongoing) cuando sonó el teléfono (Preterite/Interruption).
- Example: Mientras yo cocinaba (Imperfect), mi hermano llegó a casa (Preterite).
💡 Tip 3: Look at the Context of Time (Age vs. Specific periods)
When talking about your age or the time on the clock in the past, always use the Imperfect. But if you define a specific completed period, use the Preterite.
- Imperfect (Age/Time): Eran las seis de la tarde y yo tenía 5 años.
- Preterite (Specific period): El año pasado fue muy difícil.
💡 Tip 4: Beware of Duration!
If you mention a specific duration of time (even if it is long), you must use the Preterite because the action is closed and completed.
- Correct: Leí un libro ayer por tres horas (Preterite).
- Incorrect: *Leía un libro ayer por tres horas.
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PART 4 — Interactive Flashcards (Tarjetas de Estudio)
Click on any card to flip it and practice the rules and triggers of Preterite vs. Imperfect!
The Snapshot
Pretérito Simple: Completed actions with a clear beginning and end.
Ayer, yo comí pizza.
The Video
Imperfecto: Ongoing actions, habits, background descriptions, time, age.
íbamos a la biblioteca.
"Used to" Test
If you can translate the action as "used to" or "-ing" in English, use the
Imperfect.
Yo jugaba fútbol.
Interruption
Imperfect for background action;
Preterite for the sudden interrupting event.
Leía cuando sonó.
Time & Age
Always use the
Imperfect for telling time or stating age in the past.
Eran las seis y tenía 5 años.
Time Duration
If a specific duration of time is mentioned, use the
Preterite.
Leí por tres horas.
✏️ Siguiente paso: Continúa a la página siguiente para resolver los ejercicios interactivos sobre Pretérito e Imperfecto y poner a prueba lo que has aprendido.
