preteritevsimperfect
/preh-teh-REE-toh/
/eem-pehr-FECK-toh/
💡 Quick Rule
Preterite = a completed action (a 'dot' in time). Imperfect = a background scene or habit (a 'line' in time).
Preterite is a Photo (a snapshot of what happened). Imperfect is a Video (the ongoing scene).
- Verbs like 'saber', 'conocer', and 'querer' change meaning. 'Supe' = I found out, 'sabía' = I knew. 'Quise' = I tried, 'quería' = I wanted.
📊 Comparison Table
| Context | preterite | imperfect | Why? |
|---|---|---|---|
| Narrating a Story | El detective abrió la puerta. | Llovía y hacía frío. | Preterite moves the story forward (the action). Imperfect sets the scene (the background). |
| Talking About Routines | Ayer fui al gimnasio. | Antes iba al gimnasio. | Preterite for a specific, completed visit. Imperfect for a past habit ('used to go'). |
| Describing States | Estuvo enfermo por una semana. | Estaba enfermo cuando lo llamé. | Preterite defines a completed time frame. Imperfect describes the state at a particular moment. |
| Knowing Information | Supe la noticia esta mañana. | Yo ya sabía la noticia. | Preterite 'saber' means 'to find out'. Imperfect 'saber' means 'to already know'. |
✅ When to Use "preterite" / imperfect
preterite
Used for completed actions in the past, often with a clear beginning and end. Think of it as the main events of a story.
/preh-teh-REE-toh/
Single, completed action
Ayer compré un libro.
Yesterday I bought a book.
A sequence of events
Me levanté, me duché y salí.
I got up, showered, and left.
Interrupting action
Yo leía cuando sonó el teléfono.
I was reading when the phone rang.
Specific start or end time
La película empezó a las nueve.
The movie started at nine.
imperfect
Used for ongoing actions, descriptions, habits, and background information in the past. It sets the scene.
/eem-pehr-FECK-toh/
Descriptions (weather, feelings, age)
Hacía sol y yo estaba contento.
It was sunny and I was happy.
Habitual or repeated actions ('used to')
Cuando era niño, jugaba al fútbol.
When I was a kid, I used to play soccer.
Action in progress (background)
Yo leía cuando sonó el teléfono.
I was reading when the phone rang.
Telling time in the past
Eran las tres de la tarde.
It was three in the afternoon.
🔄 Contrast Examples
With "preterite":
Conocí a mi esposa en 2010.
I met my wife in 2010.
With "imperfect":
Ya conocía a su hermano.
I already knew her brother.
The Difference: With 'conocer', preterite means 'to meet' for the first time (an event). Imperfect means 'to know' or 'be familiar with' (an ongoing state).
With "preterite":
No quise ir a la fiesta.
I refused to go to the party.
With "imperfect":
No quería ir a la fiesta.
I didn't want to go to the party.
The Difference: Preterite implies a decision and action (refusing). Imperfect describes the background feeling or desire without a specific action.
With "preterite":
Ayer supe que te mudas.
Yesterday I found out that you're moving.
With "imperfect":
Yo no sabía que te mudabas.
I didn't know that you were moving.
The Difference: Preterite 'saber' means 'to find out' (the moment of learning). Imperfect 'saber' means 'to know' (the ongoing state of having information).
🎨 Visual Comparison
Preterite is the ACTION that happened. Imperfect is the SCENE that was happening.
⚠️ Common Mistakes
Cuando fui niño, jugué mucho.
Cuando era niño, jugaba mucho.
Childhood is a period of time, not a single event. Use imperfect ('era', 'jugaba') for ongoing descriptions and habits in the past.
Yo miraba la tele y de repente el teléfono sonaba.
Yo miraba la tele y de repente el teléfono sonó.
The phone ringing is a sudden, interrupting action that is completed. It needs the preterite ('sonó'). The background action ('miraba') uses imperfect.
📚 Related Grammar
Want to understand the grammar behind this pair? Explore these lessons for a deep dive:
🏷️ Key Words
✏️ Quick Practice
Quick Quiz: Preterite vs Imperfect
Question 1 of 3
Choose the correct verb for the sentence: 'Mientras yo ___, mi hermano llegó.' (While I was cooking, my brother arrived.)
🏷️ Tags
Frequently Asked Questions
Can I use both preterite and imperfect in the same sentence?
Absolutely! It's very common. You use the imperfect to set the scene or describe what was happening, and the preterite to describe the specific action that happened. For example: 'Yo dormía (imperfect) cuando el despertador sonó (preterite).' - 'I was sleeping when the alarm clock rang.'
Why do some verbs change meaning in the preterite?
Think of it this way: the imperfect describes a state, while the preterite describes the beginning or end of that state. So, 'sabía' is the state of knowing, but 'supe' is the moment you started knowing (you found out). 'Quería' is the state of wanting, but 'quise' is the action of trying to get it.
Is there a list of trigger words for each tense?
Yes, certain words can give you a clue. For preterite, look for words that pinpoint a specific time, like 'ayer' (yesterday), 'anoche' (last night), 'el año pasado' (last year). For imperfect, look for phrases indicating habit or non-specific time, like 'siempre' (always), 'a menudo' (often), 'cada día' (every day), 'mientras' (while).