| Simple | Progressive | Perfect | Progressive |
| Present |
| I tighten |
| you tighten |
| he/she/it tightens |
| we tighten |
| you all tighten |
| they tighten |
|
| I am tightening |
| you are tightening |
| he/she/it is tightening |
| we are tightening |
| you all are tightening |
| they are tightening |
|
| I have tightened |
| you have tightened |
| he/she/it has tightened |
| we have tightened |
| you all have tightened |
| they have tightened |
|
| I have been tightening |
| you have been tightening |
| he/she/it has been tightening |
| we have been tightening |
| you all have been tightening |
| they have been tightening |
|
| Past |
| I tightened |
| you tightened |
| he/she/it tightened |
| we tightened |
| you all tightened |
| they tightened |
|
| I was tightening |
| you were tightening |
| he/she/it was tightening |
| we were tightening |
| you all were tightening |
| they were tightening |
|
| I had tightened |
| you had tightened |
| he/she/it had tightened |
| we had tightened |
| you all had tightened |
| they had tightened |
|
| I had been tightening |
| you had been tightening |
| he/she/it had been tightening |
| we had been tightening |
| you all had been tightening |
| they had been tightening |
|
| Future |
| I will tighten |
| you will tighten |
| he/she/it will tighten |
| we will tighten |
| you all will tighten |
| they will tighten |
|
| I will be tightening |
| you will be tightening |
| he/she/it will be tightening |
| we are tightening |
| you all will be tightening |
| they will be tightening |
|
| I will have tightened |
| you will have tightened |
| he/she/it will have tightened |
| we will have tightened |
| you all will have tightened |
| they will have tightened |
|
| I will have been tightening |
| you will have been tightening |
| he/she/it will have been tightening |
| we will have been tightening |
| you all will have been tightening |
| they will have been tightening |
|
