| Präsens (Present) "impair" | I | impair | |
| Präsens Verlaufsform (Present continuous) "impair" | I | am impairing | |
| Präteritum (Simple past) "impair" | I | impaired | |
| Perfekt Verlaufsform (Past Continuous) "impair" | I | was impairing | |
| Present Perfect (Präsens) "impair" | I | have impaired | |
| Present Continuous (Futur) "impair" | I | have been impairing | |
| Plusquamperfekt (Past perfect) "impair" | I | had impaired | |
| Plusquamperfekt Verlaufsform (Past perfect continuous) "impair" | I | had been impairing | |
| Futur I (Future) "impair" | I | will impair | |
| Futur I Verlaufsform (Future continuous) "impair" | I | will be impairing | |
| Futur II (Future perfect) "impair" | I | will have impaired | |
| Futur II Verlaufsform (Future perfect continuous) "impair" | I | will have been impairing |