E->I O->U

E->I

100

Repetir el/ella preterite 

What is repitio? o with an accent idk how to do that 

200

ellos/ellas repetir preterite

What is repitieron?

300

el/ella competir preterite 

 What is compitio? accent on o (once again no idea how to do that)

400

ellos/ellas competir preterite

What is compitieron?

500

ellos/ellas freir preterite 

What is frieron?

O->U

100

el/ella dormir preterite 

What is durmio? accent on the o 

200

ellos/ellas dormir preterite 

What is durmieron?

300

el/ella morir preterite 

What is murio? accent on o

400

ellos/ellas morir preterite 

What is murieron?

500

When is preterite tense used?

What is a past action with a definite ending a definite beginning?

are they really?

100

preferir

si, prefirio accent o

200

dormir

si, durmio accent o

300

morir

si muro accent o

400

jugar 

no

500

cerrar

si cierro