| Simple | Progressive | Perfect | Progressive |
| Present |
| I undam |
| you undam |
| he/she/it undams |
| we undam |
| you all undam |
| they undam |
|
| I am undamming |
| you are undamming |
| he/she/it is undamming |
| we are undamming |
| you all are undamming |
| they are undamming |
|
| I have undammed |
| you have undammed |
| he/she/it has undammed |
| we have undammed |
| you all have undammed |
| they have undammed |
|
| I have been undamming |
| you have been undamming |
| he/she/it has been undamming |
| we have been undamming |
| you all have been undamming |
| they have been undamming |
|
| Past |
| I undammed |
| you undammed |
| he/she/it undammed |
| we undammed |
| you all undammed |
| they undammed |
|
| I was undamming |
| you were undamming |
| he/she/it was undamming |
| we were undamming |
| you all were undamming |
| they were undamming |
|
| I had undammed |
| you had undammed |
| he/she/it had undammed |
| we had undammed |
| you all had undammed |
| they had undammed |
|
| I had been undamming |
| you had been undamming |
| he/she/it had been undamming |
| we had been undamming |
| you all had been undamming |
| they had been undamming |
|
| Future |
| I will undam |
| you will undam |
| he/she/it will undam |
| we will undam |
| you all will undam |
| they will undam |
|
| I will be undamming |
| you will be undamming |
| he/she/it will be undamming |
| we are undamming |
| you all will be undamming |
| they will be undamming |
|
| I will have undammed |
| you will have undammed |
| he/she/it will have undammed |
| we will have undammed |
| you all will have undammed |
| they will have undammed |
|
| I will have been undamming |
| you will have been undamming |
| he/she/it will have been undamming |
| we will have been undamming |
| you all will have been undamming |
| they will have been undamming |
|
