| Einfach | Progressiv | Perfekt | Progressiv |
| Präsens |
| I harden |
| you harden |
| he/she/it hardens |
| we harden |
| you all harden |
| they harden |
|
| I am hardening |
| you are hardening |
| he/she/it is hardening |
| we are hardening |
| you all are hardening |
| they are hardening |
|
| I have hardened |
| you have hardened |
| he/she/it has hardened |
| we have hardened |
| you all have hardened |
| they have hardened |
|
| I have been hardening |
| you have been hardening |
| he/she/it has been hardening |
| we have been hardening |
| you all have been hardening |
| they have been hardening |
|
| Präteritum |
| I hardened |
| you hardened |
| he/she/it hardened |
| we hardened |
| you all hardened |
| they hardened |
|
| I was hardening |
| you were hardening |
| he/she/it was hardening |
| we were hardening |
| you all were hardening |
| they were hardening |
|
| I had hardened |
| you had hardened |
| he/she/it had hardened |
| we had hardened |
| you all had hardened |
| they had hardened |
|
| I had been hardening |
| you had been hardening |
| he/she/it had been hardening |
| we had been hardening |
| you all had been hardening |
| they had been hardening |
|
| Futur |
| I will harden |
| you will harden |
| he/she/it will harden |
| we will harden |
| you all will harden |
| they will harden |
|
| I will be hardening |
| you will be hardening |
| he/she/it will be hardening |
| we are hardening |
| you all will be hardening |
| they will be hardening |
|
| I will have hardened |
| you will have hardened |
| he/she/it will have hardened |
| we will have hardened |
| you all will have hardened |
| they will have hardened |
|
| I will have been hardening |
| you will have been hardening |
| he/she/it will have been hardening |
| we will have been hardening |
| you all will have been hardening |
| they will have been hardening |
|
