| Simple | Progressive | Perfect | Progressive |
| Present |
| I warn |
| you warn |
| he/she/it warns |
| we warn |
| you all warn |
| they warn |
|
| I am warning |
| you are warning |
| he/she/it is warning |
| we are warning |
| you all are warning |
| they are warning |
|
| I have warned |
| you have warned |
| he/she/it has warned |
| we have warned |
| you all have warned |
| they have warned |
|
| I have been warning |
| you have been warning |
| he/she/it has been warning |
| we have been warning |
| you all have been warning |
| they have been warning |
|
| Past |
| I warned |
| you warned |
| he/she/it warned |
| we warned |
| you all warned |
| they warned |
|
| I was warning |
| you were warning |
| he/she/it was warning |
| we were warning |
| you all were warning |
| they were warning |
|
| I had warned |
| you had warned |
| he/she/it had warned |
| we had warned |
| you all had warned |
| they had warned |
|
| I had been warning |
| you had been warning |
| he/she/it had been warning |
| we had been warning |
| you all had been warning |
| they had been warning |
|
| Future |
| I will warn |
| you will warn |
| he/she/it will warn |
| we will warn |
| you all will warn |
| they will warn |
|
| I will be warning |
| you will be warning |
| he/she/it will be warning |
| we are warning |
| you all will be warning |
| they will be warning |
|
| I will have warned |
| you will have warned |
| he/she/it will have warned |
| we will have warned |
| you all will have warned |
| they will have warned |
|
| I will have been warning |
| you will have been warning |
| he/she/it will have been warning |
| we will have been warning |
| you all will have been warning |
| they will have been warning |
|
