| Simple | Progressive | Perfect | Progressive |
| Present |
| I knurl |
| you knurl |
| he/she/it knurls |
| we knurl |
| you all knurl |
| they knurl |
|
| I am knurling |
| you are knurling |
| he/she/it is knurling |
| we are knurling |
| you all are knurling |
| they are knurling |
|
| I have knurled |
| you have knurled |
| he/she/it has knurled |
| we have knurled |
| you all have knurled |
| they have knurled |
|
| I have been knurling |
| you have been knurling |
| he/she/it has been knurling |
| we have been knurling |
| you all have been knurling |
| they have been knurling |
|
| Past |
| I knurled |
| you knurled |
| he/she/it knurled |
| we knurled |
| you all knurled |
| they knurled |
|
| I was knurling |
| you were knurling |
| he/she/it was knurling |
| we were knurling |
| you all were knurling |
| they were knurling |
|
| I had knurled |
| you had knurled |
| he/she/it had knurled |
| we had knurled |
| you all had knurled |
| they had knurled |
|
| I had been knurling |
| you had been knurling |
| he/she/it had been knurling |
| we had been knurling |
| you all had been knurling |
| they had been knurling |
|
| Future |
| I will knurl |
| you will knurl |
| he/she/it will knurl |
| we will knurl |
| you all will knurl |
| they will knurl |
|
| I will be knurling |
| you will be knurling |
| he/she/it will be knurling |
| we are knurling |
| you all will be knurling |
| they will be knurling |
|
| I will have knurled |
| you will have knurled |
| he/she/it will have knurled |
| we will have knurled |
| you all will have knurled |
| they will have knurled |
|
| I will have been knurling |
| you will have been knurling |
| he/she/it will have been knurling |
| we will have been knurling |
| you all will have been knurling |
| they will have been knurling |
|
