| I | stiff |
| you | stiff |
| he/she/it | stiffs |
| we | stiff |
| you | stiff |
| they | stiff |
| I | have stiffed |
| you | have stiffed |
| he/she/it | has stiffed |
| we | have stiffed |
| you | have stiffed |
| they | have stiffed |
| I | stiffed |
| you | stiffed |
| he/she/it | stiffed |
| we | stiffed |
| you | stiffed |
| they | stiffed |
| I | had stiffed |
| you | had stiffed |
| he/she/it | had stiffed |
| we | had stiffed |
| you | had stiffed |
| they | had stiffed |
| I | will stiff |
| you | will stiff |
| he/she/it | will stiff |
| we | will stiff |
| you | will stiff |
| they | will stiff |
| I | will have stiffed |
| you | will have stiffed |
| he/she/it | will have stiffed |
| we | will have stiffed |
| you | will have stiffed |
| they | will have stiffed |
| I | am stiffing |
| you | are stiffing |
| he/she/it | is stiffing |
| we | are stiffing |
| you | are stiffing |
| they | are stiffing |
| I | have been stiffing |
| you | have been stiffing |
| he/she/it | has been stiffing |
| we | have been stiffing |
| you | have been stiffing |
| they | have been stiffing |
| I | was stiffing |
| you | were stiffing |
| he/she/it | was stiffing |
| we | were stiffing |
| you | were stiffing |
| they | were stiffing |
| I | had been stiffing |
| you | had been stiffing |
| he/she/it | had been stiffing |
| we | had been stiffing |
| you | had been stiffing |
| they | had been stiffing |
| I | will be stiffing |
| you | will be stiffing |
| he/she/it | will be stiffing |
| we | will be stiffing |
| you | will be stiffing |
| they | will be stiffing |
| I | will have been stiffing |
| you | will have been stiffing |
| he/she/it | will have been stiffing |
| we | will have been stiffing |
| you | will have been stiffing |
| they | will have been stiffing |
| I | would stiff |
| you | would stiff |
| he/she/it | would stiff |
| we | would stiff |
| you | would stiff |
| they | would stiff |
| I | would have stiffed |
| you | would have stiffed |
| he/she/it | would have stiffed |
| we | would have stiffed |
| you | would have stiffed |
| they | would have stiffed |
| I | would be stiffing |
| you | would be stiffing |
| he/she/it | would be stiffing |
| we | would be stiffing |
| you | would be stiffing |
| they | would be stiffing |
| I | would have been stiffing |
| you | would have been stiffing |
| he/she/it | would have been stiffing |
| we | would have been stiffing |
| you | would have been stiffing |
| they | would have been stiffing |
| You | stiff |
| we | Let's stiff |
| You | stiff |