| Simple | Progressive | Perfect | Progressive |
| Present |
| I dull |
| you dull |
| he/she/it dulls |
| we dull |
| you all dull |
| they dull |
|
| I am dulling |
| you are dulling |
| he/she/it is dulling |
| we are dulling |
| you all are dulling |
| they are dulling |
|
| I have dulled |
| you have dulled |
| he/she/it has dulled |
| we have dulled |
| you all have dulled |
| they have dulled |
|
| I have been dulling |
| you have been dulling |
| he/she/it has been dulling |
| we have been dulling |
| you all have been dulling |
| they have been dulling |
|
| Past |
| I dulled |
| you dulled |
| he/she/it dulled |
| we dulled |
| you all dulled |
| they dulled |
|
| I was dulling |
| you were dulling |
| he/she/it was dulling |
| we were dulling |
| you all were dulling |
| they were dulling |
|
| I had dulled |
| you had dulled |
| he/she/it had dulled |
| we had dulled |
| you all had dulled |
| they had dulled |
|
| I had been dulling |
| you had been dulling |
| he/she/it had been dulling |
| we had been dulling |
| you all had been dulling |
| they had been dulling |
|
| Future |
| I will dull |
| you will dull |
| he/she/it will dull |
| we will dull |
| you all will dull |
| they will dull |
|
| I will be dulling |
| you will be dulling |
| he/she/it will be dulling |
| we are dulling |
| you all will be dulling |
| they will be dulling |
|
| I will have dulled |
| you will have dulled |
| he/she/it will have dulled |
| we will have dulled |
| you all will have dulled |
| they will have dulled |
|
| I will have been dulling |
| you will have been dulling |
| he/she/it will have been dulling |
| we will have been dulling |
| you all will have been dulling |
| they will have been dulling |
|
