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