| costoier |
| avoir costoié |
| Present | costoiant |
| Past | costoié |
| 1st sing. | costi; costoi |
| 2nd sing. | costïes; costoies |
| 3rd sing. | costïe; costoie |
| 1st plur. | costoions |
| 2nd plur. | costoiez |
| 3rd plur. | costïent; costoient |
| 1st sing. | costoioie; costoieie; costoioe; costoieve |
| 2nd sing. | costoioies; costoieies; costoioes; costoieves |
| 3rd sing. | costoioit; costoieit; costoiot; costoieve |
| 1st plur. | costoiiiens; costoiiens |
| 2nd plur. | costoiiiez; costoiiez |
| 3rd plur. | costoioient; costoieient; costoioent; costoievent |
| 1st sing. | costoiai |
| 2nd sing. | costoias |
| 3rd sing. | costoia |
| 1st plur. | costoiames |
| 2nd plur. | costoiastes |
| 3rd plur. | costoierent |
| 1st sing. | costoierai |
| 2nd sing. | costoieras |
| 3rd sing. | costoiera |
| 1st plur. | costoierons |
| 2nd plur. | costoieroiz; costoiereiz; costoierez |
| 3rd plur. | costoieront |
| 1st sing. | costoieroie; costoiereie |
| 2nd sing. | costoieroies; costoiereies |
| 3rd sing. | costoieroit; costoiereit |
| 1st plur. | costoieriiens; costoieriens |
| 2nd plur. | costoieriiez; costoieriez |
| 3rd plur. | costoieroient; costoiereient |
| 1st sing. | costi; costoi |
| 2nd sing. | costis; costois |
| 3rd sing. | costit; costoit |
| 1st plur. | costoions |
| 2nd plur. | costoiez |
| 3rd plur. | costïent; costoient |
| 1st sing. | costoiasse |
| 2nd sing. | costoiasses |
| 3rd sing. | costoiast |
| 1st plur. | costoiissons; costoiissiens |
| 2nd plur. | costoiissoiz; costoiissez; costoiissiez |
| 3rd plur. | costoiassent |
| 2nd sing. | costïe; costoie |
| 1st plur. | costoions |
| 2nd plur. | costoiez |