The structure of a sentence in past progressive tense consists of a noun/pronoun followed by was/were and a verb in the progressive form. The past progressive tense is used to communicate that an activity was ongoing when another action occurred. It can also express that an activity was in progress at some point in the past. A sentence may include two parts in past progressive tense to show that two activities were happening simultaneously.

1. Structure - Estructura<br />The structure of a simple sentence in past progressive tense is the following:La estructura de una sencilla oración en tiempo pasado progresivo es la siguiente:<br />noun/pronoun + was/were + verb in progressive form. \"
was y were son complementos\"
<br />Examples:Ejemplos:<br />I was walking.You were eating.She was thinking.We were planning.It was snowing.The Moon was lighting.<br />Uses - Usos<br />Present Progressive: The action was in progress when another action occurred.<br />Past progressive tense is usually used to communicate that an activity was going on when another action occurred. Example:El tiempo pasado progresivo es comúnmente usado para comunicar que una actividad estaba sucediendo cuando otra acción ocurrió. Ejemplo:<br />When I was walking home, I saw my old friend John.<br />I saw my old friend John is the part in simple past tense, and when I was walking home is te part in past progressive tense. Another example isI saw my old friend es una parte en tiempo pasado simple, y when I was walking home es una parte dependiente en tiempo pasado progresivo. Otro ejemplo es<br />Because it was raining, we could not go outside.<br />A sentence including a part in past progressive tense may also expresses that an activity was in progress at some point in the past. Example:Una oración que incluya una parte en tiempo pasado progresivo puede expresar también que una actividad estaba sucediendo en cierto momento en el pasado. Ejemplo:<br />Last day at midnight, we were watching movies.<br />A sentence may, of course, include two parts in past progressive tense when it is intended to express that two activities were in progress simultaneously. Example:Una oración puede, por supuesto, incluir dos partes en pasado progresivo cuando se pretende expresar que dos actividades estaban llevándose a cabo simultáneamente. Ejemplos:<br />While I was working, you were resting worriless.<br />