| Simple | Progressive | Perfect | Progressive |
| Present |
| I impugn |
| you impugn |
| he/she/it impugns |
| we impugn |
| you all impugn |
| they impugn |
|
| I am impugning |
| you are impugning |
| he/she/it is impugning |
| we are impugning |
| you all are impugning |
| they are impugning |
|
| I have impugned |
| you have impugned |
| he/she/it has impugned |
| we have impugned |
| you all have impugned |
| they have impugned |
|
| I have been impugning |
| you have been impugning |
| he/she/it has been impugning |
| we have been impugning |
| you all have been impugning |
| they have been impugning |
|
| Past |
| I impugned |
| you impugned |
| he/she/it impugned |
| we impugned |
| you all impugned |
| they impugned |
|
| I was impugning |
| you were impugning |
| he/she/it was impugning |
| we were impugning |
| you all were impugning |
| they were impugning |
|
| I had impugned |
| you had impugned |
| he/she/it had impugned |
| we had impugned |
| you all had impugned |
| they had impugned |
|
| I had been impugning |
| you had been impugning |
| he/she/it had been impugning |
| we had been impugning |
| you all had been impugning |
| they had been impugning |
|
| Future |
| I will impugn |
| you will impugn |
| he/she/it will impugn |
| we will impugn |
| you all will impugn |
| they will impugn |
|
| I will be impugning |
| you will be impugning |
| he/she/it will be impugning |
| we are impugning |
| you all will be impugning |
| they will be impugning |
|
| I will have impugned |
| you will have impugned |
| he/she/it will have impugned |
| we will have impugned |
| you all will have impugned |
| they will have impugned |
|
| I will have been impugning |
| you will have been impugning |
| he/she/it will have been impugning |
| we will have been impugning |
| you all will have been impugning |
| they will have been impugning |
|
