| I | warn |
| you | warn |
| he/she/it | warns |
| we | warn |
| you | warn |
| they | warn |
| I | have warned |
| you | have warned |
| he/she/it | has warned |
| we | have warned |
| you | have warned |
| they | have warned |
| I | warned |
| you | warned |
| he/she/it | warned |
| we | warned |
| you | warned |
| they | warned |
| I | had warned |
| you | had warned |
| he/she/it | had warned |
| we | had warned |
| you | had warned |
| they | had warned |
| I | will warn |
| you | will warn |
| he/she/it | will warn |
| we | will warn |
| you | will warn |
| they | will warn |
| I | will have warned |
| you | will have warned |
| he/she/it | will have warned |
| we | will have warned |
| you | will have warned |
| they | will have warned |
| I | am warning |
| you | are warning |
| he/she/it | is warning |
| we | are warning |
| you | are warning |
| they | are warning |
| I | have been warning |
| you | have been warning |
| he/she/it | has been warning |
| we | have been warning |
| you | have been warning |
| they | have been warning |
| I | was warning |
| you | were warning |
| he/she/it | was warning |
| we | were warning |
| you | were warning |
| they | were warning |
| I | had been warning |
| you | had been warning |
| he/she/it | had been warning |
| we | had been warning |
| you | had been warning |
| they | had been warning |
| I | will be warning |
| you | will be warning |
| he/she/it | will be warning |
| we | will be warning |
| you | will be warning |
| they | will be warning |
| I | will have been warning |
| you | will have been warning |
| he/she/it | will have been warning |
| we | will have been warning |
| you | will have been warning |
| they | will have been warning |
| I | would warn |
| you | would warn |
| he/she/it | would warn |
| we | would warn |
| you | would warn |
| they | would warn |
| I | would have warned |
| you | would have warned |
| he/she/it | would have warned |
| we | would have warned |
| you | would have warned |
| they | would have warned |
| I | would be warning |
| you | would be warning |
| he/she/it | would be warning |
| we | would be warning |
| you | would be warning |
| they | would be warning |
| I | would have been warning |
| you | would have been warning |
| he/she/it | would have been warning |
| we | would have been warning |
| you | would have been warning |
| they | would have been warning |
| You | warn |
| we | Let's warn |
| You | warn |