| Présent (Present) "undergird" | I | undergird | |
| Présent continu (Present Continuous) "undergird" | I | am undergirding | |
| Passé (Simple past) "undergird" | I | undergirded | |
| Passé antérieur (Past Continuous) "undergird" | I | was undergirding | |
| Présent parfait (Present perfect) "undergird" | I | have undergirded | |
| Continu Présent (Present perfect continuous) "undergird" | I | have been undergirding | |
| Imparfait (Past perfect) "undergird" | I | had undergirded | |
| Plus-que-parfait (Past perfect continuous) "undergird" | I | had been undergirding | |
| Futur simple (Future) "undergird" | I | will undergird | |
| Futur (Future continuous) "undergird" | I | will be undergirding | |
| Futur antérieur (Future perfect) "undergird" | I | will have undergirded | |
| Futur antérieur continu (Future perfect continuous) "undergird" | I | will have been undergirding |