Cierto o falso: Al hablar del imperfecto, ¿se puede usar las palabras un día, una tarde y de repente? Question 3 options:
True
False

True

Explanation:

because It only expresses that an event was in the past.  It does not contain any limits.  We pretend we don't know when it started or when it ended.

True: un día, una tarde ; False: de repente

Explanation:

The imperfect can be used to describe events that were happening in the past over time, so we can say:

Un día yo estaba en la playa cuando...  (imperfect past)

Una tarde nosotros íbamos al parque y...  (imperfect past)

On the other hand, if we want to talk about a specific event that happened in the past, we use the preterit tense.

de repente empezó a llover.   (preterite)

de repente vimos a nuestros vecinos. (preterite)

One day I was at the beach when suddenly it started to rain.  

One afternoon we were going to the park and suddenly we saw our neighbors.