Spanish has two main past tenses that students use often: the preterite and the imperfect. This cheat sheet helps you choose the correct tense and form common verbs quickly. It is useful for writing narratives, answering reading questions, and describing past events clearly.
Knowing the difference between completed actions and background descriptions is essential for accurate Spanish.
Key Facts
- Use the preterite for completed past actions, single events, beginnings, endings, and sequences, as in Ayer estudié.
- Regular -ar preterite endings are é, aste, ó, amos, asteis, aron, as in hablé, hablaste, habló.
- Regular -er and -ir preterite endings are í, iste, ió, imos, isteis, ieron, as in comí, comiste, comió.
- Use the imperfect for ongoing actions, repeated past habits, descriptions, age, time, weather, feelings, and background information.
- Regular -ar imperfect endings are aba, abas, aba, ábamos, abais, aban, as in hablaba, hablabas, hablaba.
- Regular -er and -ir imperfect endings are ía, ías, ía, íamos, íais, ían, as in comía and vivía.
- The three main irregular imperfect verbs are ir: iba, ver: veía, and ser: era.
- Common irregular preterite stems include tener: tuv-, estar: estuv-, poder: pud-, poner: pus-, hacer: hic-, querer: quis-, venir: vin-, and decir: dij-.
Vocabulary
- Preterite
- The Spanish past tense used for completed actions or events that happened at a specific point in time.
- Imperfect
- The Spanish past tense used for ongoing, repeated, or descriptive actions in the past.
- Habitual action
- An action that happened repeatedly in the past, often translated with used to or would.
- Completed action
- An action that started and ended in the past and is often expressed with the preterite.
- Verb ending
- The part added to a verb stem to show the subject, tense, and sometimes mood.
- Irregular verb
- A verb that does not follow the standard conjugation pattern for its tense.
Common Mistakes to Avoid
- Using the preterite for past habits is wrong when the action happened repeatedly. Use the imperfect for ideas like Cada verano nadaba or Cuando era niño jugaba.
- Using the imperfect for a single completed event is wrong when the action happened once and ended. Use the preterite for sentences like Ayer compré un libro.
- Forgetting accent marks in preterite forms changes accuracy and can confuse tense or meaning. Write hablé, comí, and vivió with the correct accents.
- Treating ser, ir, and ver as regular imperfect verbs is wrong because they are irregular. Use era, iba, and veía instead of forms like seraba or iba with the wrong pattern.
- Choosing tense only by English translation can be misleading because was walking can mean background action or interrupted action. Look at the purpose of the verb in the sentence.
Practice Questions
- 1 Conjugate hablar in the preterite for yo, tú, and ellos.
- 2 Conjugate comer in the imperfect for nosotros and ella.
- 3 Choose the correct form: Ayer nosotros (fuimos / íbamos) al cine a las ocho.
- 4 Explain why the imperfect is better than the preterite in the sentence Cuando era pequeño, jugaba en el parque todos los días.
Understanding Past Tense (Preterite & Imperfect)
The key idea is viewpoint. A speaker can present a past situation as a scene in progress or as an event viewed from outside, with clear edges. Compare Llovía cuando salí.
Rain was already falling and formed the setting. My leaving happened at one defined point. In a story, the imperfect often slows the action and paints what was happening.
The preterite moves the plot forward. Writers commonly use both tenses in the same sentence because the background situation and the interrupting event have different jobs.
Time expressions can give useful clues, but they do not make the choice automatically. Words such as ayer, de repente, una vez, and entonces often point toward a bounded event. Expressions such as siempre, normalmente, cada día, todos los veranos, and mientras often fit repeated or continuing situations.
Still, students should first ask what the sentence means. A repeated action can be treated as a complete total when the number is stated.
Fui al gimnasio tres veces describes three finished visits. Iba al gimnasio describes a usual habit without counting its limits.
Some verbs change meaning depending on the tense because the two viewpoints change what the listener understands. Sabía means knew or had knowledge over a period. Supe often means found out at a particular moment.
Podía means was able to or had the ability in general. Pude often means managed to do something on one occasion. Quería means wanted, while quise can show that someone tried or decided to do something.
Conocía means knew a person or place, while conocí can mean met someone for the first time. These differences are especially important in reading because a single tense can change the direction of a scene.
Irregular forms need practice in groups rather than as one long list. Many irregular preterite forms share a pattern after their changed stem. The endings do not use accent marks, and the third person plural ending is often eron.
Verbs with a stem ending in j, such as decir, use eron rather than ieron. Look carefully at forms such as hizo, which changes to hicieron in the plural.
Spelling changes in some regular verbs protect the original sound, as in busqué or llegué. Reading forms aloud can help students notice which part is the stem and which part is the ending.
When writing, build the timeline before choosing every verb. Mark the main events first. Then add the people, places, emotions, weather, time, and routines around those events.
Check each verb subject, since yo and él or ella forms can look similar in the imperfect. Watch accent marks closely because hablo means I speak in the present, while habló means he or she spoke. Short paired sentences are a strong practice method.
Write one background statement, then add one event that occurs within it. This trains the meaning choice instead of relying only on memorized signal words.