<u>Llovía </u>cuando ellos <em>salieron. </em>(It was raining when they got out.)
<u>Llovía </u><em>- </em>imperfect tense because it describes the past situation
<em>Salieron</em> - past simple tense because it is a finished action in the past
Cuando <em>llegué</em> a la tienda ya <u>estaba</u> cerrada. (When I came the shop was already closed.)
<u>Estaba</u> - imperfect tense because it describes the past situation
<em>Llegué </em>- past simple tense because it is a finished action in the past
De repende <em>me acordé</em> de que <u>tenía</u> deberes. (I remembered that I had homework to do.)
<u>Tenía</u> - imperfect tense because it describes the past situation
<em>Me acordé</em> - past simple tense because it is a finished action in the past
Normalmente yo <u>limpiaba</u> mientras mi madre <u>cocinaba</u>. (Usually, I used to clean while my madre used to cook.)
<u>Limpiaba, cocinaba</u> - imperfect tense because these are two habits repetead regularly in the past (normalmente = usually)
(Normalmente yo limpio mientras mi madre cocina. - we could use the present tense in this case too)
Cuando Andrea <u>corría</u> por el parque los fines de semana, siempre <u>veía</u> a mis amigos. (When Andrea used to run in the park on weekends, she always used to see my friends.)
<u>Corría, veía</u> - mperfect tense because these are two habits repetead regularly in the past (siempre = always)
(Cuando Andrea corre por el parque los fines de semana, siempre ve a mis amigos. - we could use the present tense in this case too)