1. The Imperfect Tense; Preterite and Imperfect
Unidad 4 Lección 1

2. The Imperfect Tense Use the imperfect tense to:
talk about something that was happening
talk about something you used to do
say how old someone was
tell what time it was

3. regular -ar endings
-aba -ábamos
-abas -abais
-aba -aban

4. regular -er/-ir endings
-ía -íamos
-ías -íais
-ía -ían

5. irregular imperfect
ser
era éramos
eras erais
era eran

6. irregular imperfect ir
iba íbamos
ibas ibais
iba iban

7. irregular imperfect
ver
veía veíamos
veías veíais
veía veían

8. Preterite and Imperfect
Use the preterite if the action started and ended at a definite time.
Use the imperfect to talk about past actions without saying when they began or ended.

9. two overlapping events:
Use the preterite for the action that occurred (interrupting action).
Use the imperfect for what was going on at the time (background action).