In the last tutorial, you watched videos about AR verbs, ir and ser in the past tense. This video will teach you about the past tense verb endings for regular ER and IR verbs in Spanish.
You only need to watch up till 4:10 or so. If you do not like/understand this video, you could look up another on YouTube (regular ER and IR verbs in Spanish) and answer the same questions below.
Source: VisualLinkLanguages