| Presente (Present) "undergo" | I | undergo | |
| Presente continuo (Present Continuous) "undergo" | I | am undergoing | |
| Pasado simple (Simple past) "undergo" | I | underwent | |
| Pasado continuo (Past Continuous) "undergo" | I | was undergoing | |
| Presente perfecto (Present perfect) "undergo" | I | have undergone | |
| Presente perfecto continuo (Present perfect continuous) "undergo" | I | have been undergoing | |
| Pasado perfecto (Past perfect) "undergo" | I | had undergone | |
| Pasado perfecto continuo (Past perfect continuous) "undergo" | I | had been undergoing | |
| Futuro (Future) "undergo" | I | will undergo | |
| Futuro continuo (Future continuous) "undergo" | I | will be undergoing | |
| Futuro perfecto (Future perfect) "undergo" | I | will have undergone | |
| Futuro perfecto continuo (Future perfect continuous) "undergo" | I | will have been undergoing |