| Simple | Progressive | Perfect | Progressive |
| Present |
| I underperform |
| you underperform |
| he/she/it underperforms |
| we underperform |
| you all underperform |
| they underperform |
|
| I am underperforming |
| you are underperforming |
| he/she/it is underperforming |
| we are underperforming |
| you all are underperforming |
| they are underperforming |
|
| I have underperformed |
| you have underperformed |
| he/she/it has underperformed |
| we have underperformed |
| you all have underperformed |
| they have underperformed |
|
| I have been underperforming |
| you have been underperforming |
| he/she/it has been underperforming |
| we have been underperforming |
| you all have been underperforming |
| they have been underperforming |
|
| Past |
| I underperformed |
| you underperformed |
| he/she/it underperformed |
| we underperformed |
| you all underperformed |
| they underperformed |
|
| I was underperforming |
| you were underperforming |
| he/she/it was underperforming |
| we were underperforming |
| you all were underperforming |
| they were underperforming |
|
| I had underperformed |
| you had underperformed |
| he/she/it had underperformed |
| we had underperformed |
| you all had underperformed |
| they had underperformed |
|
| I had been underperforming |
| you had been underperforming |
| he/she/it had been underperforming |
| we had been underperforming |
| you all had been underperforming |
| they had been underperforming |
|
| Future |
| I will underperform |
| you will underperform |
| he/she/it will underperform |
| we will underperform |
| you all will underperform |
| they will underperform |
|
| I will be underperforming |
| you will be underperforming |
| he/she/it will be underperforming |
| we are underperforming |
| you all will be underperforming |
| they will be underperforming |
|
| I will have underperformed |
| you will have underperformed |
| he/she/it will have underperformed |
| we will have underperformed |
| you all will have underperformed |
| they will have underperformed |
|
| I will have been underperforming |
| you will have been underperforming |
| he/she/it will have been underperforming |
| we will have been underperforming |
| you all will have been underperforming |
| they will have been underperforming |
|
