| I | stifle |
| you | stifle |
| he/she/it | stifles |
| we | stifle |
| you | stifle |
| they | stifle |
| I | have stifled |
| you | have stifled |
| he/she/it | has stifled |
| we | have stifled |
| you | have stifled |
| they | have stifled |
| I | stifled |
| you | stifled |
| he/she/it | stifled |
| we | stifled |
| you | stifled |
| they | stifled |
| I | had stifled |
| you | had stifled |
| he/she/it | had stifled |
| we | had stifled |
| you | had stifled |
| they | had stifled |
| I | will stifle |
| you | will stifle |
| he/she/it | will stifle |
| we | will stifle |
| you | will stifle |
| they | will stifle |
| I | will have stifled |
| you | will have stifled |
| he/she/it | will have stifled |
| we | will have stifled |
| you | will have stifled |
| they | will have stifled |
| I | am stifling |
| you | are stifling |
| he/she/it | is stifling |
| we | are stifling |
| you | are stifling |
| they | are stifling |
| I | have been stifling |
| you | have been stifling |
| he/she/it | has been stifling |
| we | have been stifling |
| you | have been stifling |
| they | have been stifling |
| I | was stifling |
| you | were stifling |
| he/she/it | was stifling |
| we | were stifling |
| you | were stifling |
| they | were stifling |
| I | had been stifling |
| you | had been stifling |
| he/she/it | had been stifling |
| we | had been stifling |
| you | had been stifling |
| they | had been stifling |
| I | will be stifling |
| you | will be stifling |
| he/she/it | will be stifling |
| we | will be stifling |
| you | will be stifling |
| they | will be stifling |
| I | will have been stifling |
| you | will have been stifling |
| he/she/it | will have been stifling |
| we | will have been stifling |
| you | will have been stifling |
| they | will have been stifling |
| I | would stifle |
| you | would stifle |
| he/she/it | would stifle |
| we | would stifle |
| you | would stifle |
| they | would stifle |
| I | would have stifled |
| you | would have stifled |
| he/she/it | would have stifled |
| we | would have stifled |
| you | would have stifled |
| they | would have stifled |
| I | would be stifling |
| you | would be stifling |
| he/she/it | would be stifling |
| we | would be stifling |
| you | would be stifling |
| they | would be stifling |
| I | would have been stifling |
| you | would have been stifling |
| he/she/it | would have been stifling |
| we | would have been stifling |
| you | would have been stifling |
| they | would have been stifling |
| You | stifle |
| we | Let's stifle |
| You | stifle |