Question

which of
the sentences
below uses the
imperfect tense?
estaba lloviendo mucho.
está lloviendo mucho.
estuvo lloviendo mucho.

Explanation:

The imperfect tense in Spanish for the verb llover (to rain) uses the imperfect continuous structure estaba + gerund for ongoing past actions. "Estaba lloviendo mucho" is the imperfect continuous form, while "Está lloviendo mucho" is present continuous, and "Estuvo lloviendo mucho" is preterite (completed past) continuous.

Answer:

Estaba lloviendo mucho.