| Simple | Progressive | Perfect | Progressive |
| Present |
| I unfasten |
| you unfasten |
| he/she/it unfastens |
| we unfasten |
| you all unfasten |
| they unfasten |
|
| I am unfastening |
| you are unfastening |
| he/she/it is unfastening |
| we are unfastening |
| you all are unfastening |
| they are unfastening |
|
| I have unfastened |
| you have unfastened |
| he/she/it has unfastened |
| we have unfastened |
| you all have unfastened |
| they have unfastened |
|
| I have been unfastening |
| you have been unfastening |
| he/she/it has been unfastening |
| we have been unfastening |
| you all have been unfastening |
| they have been unfastening |
|
| Past |
| I unfastened |
| you unfastened |
| he/she/it unfastened |
| we unfastened |
| you all unfastened |
| they unfastened |
|
| I was unfastening |
| you were unfastening |
| he/she/it was unfastening |
| we were unfastening |
| you all were unfastening |
| they were unfastening |
|
| I had unfastened |
| you had unfastened |
| he/she/it had unfastened |
| we had unfastened |
| you all had unfastened |
| they had unfastened |
|
| I had been unfastening |
| you had been unfastening |
| he/she/it had been unfastening |
| we had been unfastening |
| you all had been unfastening |
| they had been unfastening |
|
| Future |
| I will unfasten |
| you will unfasten |
| he/she/it will unfasten |
| we will unfasten |
| you all will unfasten |
| they will unfasten |
|
| I will be unfastening |
| you will be unfastening |
| he/she/it will be unfastening |
| we are unfastening |
| you all will be unfastening |
| they will be unfastening |
|
| I will have unfastened |
| you will have unfastened |
| he/she/it will have unfastened |
| we will have unfastened |
| you all will have unfastened |
| they will have unfastened |
|
| I will have been unfastening |
| you will have been unfastening |
| he/she/it will have been unfastening |
| we will have been unfastening |
| you all will have been unfastening |
| they will have been unfastening |
|
