Color Key
| Regular | Irregular |
| Ortho. Change | Not Used |
oponerse
to go against, to oppose, to object, to play off, to put up
Imperative (Command) / Imperativo
| me | — — — |
| te | oponte |
| se | opóngase |
| nos | opongámonos |
| os | oponeos |
| se | opónganse |
Negative Imperative (Command) / Imperativo Negativo
| me | — — — |
| te | no te opongas |
| se | no se oponga |
| nos | no nos opongamos |
| os | no os opongáis |
| se | no se opongan |