| Einfach | Progressiv | Perfekt | Progressiv |
| Präsens |
| I weaken |
| you weaken |
| he/she/it weakens |
| we weaken |
| you all weaken |
| they weaken |
|
| I am weakening |
| you are weakening |
| he/she/it is weakening |
| we are weakening |
| you all are weakening |
| they are weakening |
|
| I have weakened |
| you have weakened |
| he/she/it has weakened |
| we have weakened |
| you all have weakened |
| they have weakened |
|
| I have been weakening |
| you have been weakening |
| he/she/it has been weakening |
| we have been weakening |
| you all have been weakening |
| they have been weakening |
|
| Präteritum |
| I weakened |
| you weakened |
| he/she/it weakened |
| we weakened |
| you all weakened |
| they weakened |
|
| I was weakening |
| you were weakening |
| he/she/it was weakening |
| we were weakening |
| you all were weakening |
| they were weakening |
|
| I had weakened |
| you had weakened |
| he/she/it had weakened |
| we had weakened |
| you all had weakened |
| they had weakened |
|
| I had been weakening |
| you had been weakening |
| he/she/it had been weakening |
| we had been weakening |
| you all had been weakening |
| they had been weakening |
|
| Futur |
| I will weaken |
| you will weaken |
| he/she/it will weaken |
| we will weaken |
| you all will weaken |
| they will weaken |
|
| I will be weakening |
| you will be weakening |
| he/she/it will be weakening |
| we are weakening |
| you all will be weakening |
| they will be weakening |
|
| I will have weakened |
| you will have weakened |
| he/she/it will have weakened |
| we will have weakened |
| you all will have weakened |
| they will have weakened |
|
| I will have been weakening |
| you will have been weakening |
| he/she/it will have been weakening |
| we will have been weakening |
| you all will have been weakening |
| they will have been weakening |
|
