| Present "fatigue" | I | fatigue | |
| Present Continuous "fatigue" | I | am fatiguing | |
| Simple past "fatigue" | I | fatigued | |
| Past Continuous "fatigue" | I | was fatiguing | |
| Present perfect "fatigue" | I | have fatigued | |
| Present perfect continuous "fatigue" | I | have been fatiguing | |
| Past perfect "fatigue" | I | had fatigued | |
| Past perfect continuous "fatigue" | I | had been fatiguing | |
| Future "fatigue" | I | will fatigue | |
| Future continuous "fatigue" | I | will be fatiguing | |
| Future perfect "fatigue" | I | will have fatigued | |
| Future perfect continuous "fatigue" | I | will have been fatiguing |