These are the complete sentences using the preterite and imperfect tenses:
- Usted iba a Mar del Plata y descansaba todos los veranos.
- Los viajeros anduvieron por cinco días en el desierto pero nunca encontraron agua.
- Cuando tú tenías un año empezaste a caminar.
- Después de varios intentos, Ángela y yo pudimos construir una casa de naipes.
Sentence 1 is conjugated using the imperfect tense; sentences 2 and 4 using the preterite tense. However, sentence 3 is conjugated using both tenses.
Preterite tense
The Spanish preterite tense ("pretérito perfecto simple" in Spanish) is used to talk about actions completed at some point in the past.
Imperfect tense
The Spanish imperfect tense ("pretérito imperfecto" in Spanish) is used to talk about past habitual actions or to talk about what someone was doing but then got interrupted with something else.
Check more information about the imperfect tense here https://brainly.com/question/1131180?referrer=searchResults
