| sg1st | sg2nd | sg3rd | pl1st | pl2nd | pl3rd | |
|---|---|---|---|---|---|---|
| Simple present | impugn | impugn | impugns | impugn | impugn | impugn |
| Present continuous | am impugning | are impugning | is impugning | are impugning | are impugning | are impugning |
| Simple past | impugned | impugned | impugned | impugned | impugned | impugned |
| Past continuous | was impugning | were impugning | was impugning | were impugning | were impugning | were impugning |
| Simple future | will impugn | will impugn | will impugn | will impugn | will impugn | will impugn |
| Future continuous | will be impugning | will be impugning | will be impugning | will be impugning | will be impugning | will be impugning |
| Present perfect | have impugned | have impugned | has impugned | have impugned | have impugned | have impugned |
| Present perfect continuous | have been impugning | have been impugning | has been impugning | have been impugning | have been impugning | have been impugning |
| Past perfect | had impugned | had impugned | had impugned | had impugned | had impugned | had impugned |
| Past perfect continuous | had been impugning | had been impugning | had been impugning | had been impugning | had been impugning | had been impugning |
| Future perfect | will have impugned | will have impugned | will have impugned | will have impugned | will have impugned | will have impugned |
| Future perfect continuous | will have been impugning | will have been impugning | will have been impugning | will have been impugning | will have been impugning | will have been impugning |
| sg1st | sg2nd | sg3rd | pl1st | pl2nd | pl3rd | |
|---|---|---|---|---|---|---|
| Simple present | don't impugn | don't impugn | doesn't impugn | don't impugn | don't impugn | don't impugn |
| Present continuous | am not impugning | are not impugning | is not impugning | are not impugning | are not impugning | are not impugning |
| Simple past | didn't impugn | didn't impugn | didn't impugn | didn't impugn | didn't impugn | didn't impugn |
| Past continuous | was not impugning | were not impugning | was not impugning | were not impugning | were not impugning | were not impugning |
| Simple future | won't impugn | won't impugn | won't impugn | won't impugn | won't impugn | won't impugn |
| Future continuous | will not be impugning | will not be impugning | will not be impugning | will not be impugning | will not be impugning | will not be impugning |
| Present perfect | have not impugned | have not impugned | has not impugned | have not impugned | have not impugned | have not impugned |
| Present perfect continuous | have not been impugning | have not been impugning | has not been impugning | have not been impugning | have not been impugning | have not been impugning |
| Past perfect | had not impugned | had not impugned | had not impugned | had not impugned | had not impugned | had not impugned |
| Past perfect continuous | had not been impugning | had not been impugning | had not been impugning | had not been impugning | had not been impugning | had not been impugning |
| Future perfect | will not have impugned | will not have impugned | will not have impugned | will not have impugned | will not have impugned | will not have impugned |
| Future perfect continuous | will not have been impugning | will not have been impugning | will not have been impugning | will not have been impugning | will not have been impugning | will not have been impugning |