| Presente (Present) "occur" | I | occur | |
| Presente continuo (Present Continuous) "occur" | I | am occurring | |
| Pasado simple (Simple past) "occur" | I | occurred | |
| Pasado continuo (Past Continuous) "occur" | I | was occurring | |
| Presente perfecto (Present perfect) "occur" | I | have occurred | |
| Presente perfecto continuo (Present perfect continuous) "occur" | I | have been occurring | |
| Pasado perfecto (Past perfect) "occur" | I | had occurred | |
| Pasado perfecto continuo (Past perfect continuous) "occur" | I | had been occurring | |
| Futuro (Future) "occur" | I | will occur | |
| Futuro continuo (Future continuous) "occur" | I | will be occurring | |
| Futuro perfecto (Future perfect) "occur" | I | will have occurred | |
| Futuro perfecto continuo (Future perfect continuous) "occur" | I | will have been occurring |