Answer:
To use el preterito, drop the -ar or -er/ir endings and attach the endings in the chart (amos or aron, for example)
Explanation:
I attached a photo of the charts below.
El preterito is used for verbs in the past tense. For example, el estudio means he studied.
One example is bailar: yo baile, tu bailaste, el bailo, nosotros bailamos, vosotros bailasteis, and ellos bailaron.
Example: Vivir: vivi, viviste, vivio, vivimos, vivisteis, vivieron
