| Present "regain" | I | regain | |
| Present Continuous "regain" | I | am regaining | |
| Simple past "regain" | I | regained | |
| Past Continuous "regain" | I | was regaining | |
| Present perfect "regain" | I | have regained | |
| Present perfect continuous "regain" | I | have been regaining | |
| Past perfect "regain" | I | had regained | |
| Past perfect continuous "regain" | I | had been regaining | |
| Future "regain" | I | will regain | |
| Future continuous "regain" | I | will be regaining | |
| Future perfect "regain" | I | will have regained | |
| Future perfect continuous "regain" | I | will have been regaining |