| Simple | Progressive | Perfect | Progressive |
| Present |
| I undergird |
| you undergird |
| he/she/it undergirds |
| we undergird |
| you all undergird |
| they undergird |
|
| I am undergirding |
| you are undergirding |
| he/she/it is undergirding |
| we are undergirding |
| you all are undergirding |
| they are undergirding |
|
| I have undergirded |
| you have undergirded |
| he/she/it has undergirded |
| we have undergirded |
| you all have undergirded |
| they have undergirded |
|
| I have been undergirding |
| you have been undergirding |
| he/she/it has been undergirding |
| we have been undergirding |
| you all have been undergirding |
| they have been undergirding |
|
| Past |
| I undergirded |
| you undergirded |
| he/she/it undergirded |
| we undergirded |
| you all undergirded |
| they undergirded |
|
| I was undergirding |
| you were undergirding |
| he/she/it was undergirding |
| we were undergirding |
| you all were undergirding |
| they were undergirding |
|
| I had undergirded |
| you had undergirded |
| he/she/it had undergirded |
| we had undergirded |
| you all had undergirded |
| they had undergirded |
|
| I had been undergirding |
| you had been undergirding |
| he/she/it had been undergirding |
| we had been undergirding |
| you all had been undergirding |
| they had been undergirding |
|
| Future |
| I will undergird |
| you will undergird |
| he/she/it will undergird |
| we will undergird |
| you all will undergird |
| they will undergird |
|
| I will be undergirding |
| you will be undergirding |
| he/she/it will be undergirding |
| we are undergirding |
| you all will be undergirding |
| they will be undergirding |
|
| I will have undergirded |
| you will have undergirded |
| he/she/it will have undergirded |
| we will have undergirded |
| you all will have undergirded |
| they will have undergirded |
|
| I will have been undergirding |
| you will have been undergirding |
| he/she/it will have been undergirding |
| we will have been undergirding |
| you all will have been undergirding |
| they will have been undergirding |
|
