Present
| I | back-fire |
| You | back-fire |
| She | back-fires |
| We | back-fire |
| They | back-fire |
Past
| I | back-fired |
| You | back-fired |
| She | back-fired |
| We | back-fired |
| They | back-fired |
Perfect
| I | have | back-fired |
| You | have | back-fired |
| She | has | back-fired |
| We | have | back-fired |
| They | have | back-fired |
Future
| I | will | back-fire |
| You | will | back-fire |
| She | will | back-fire |
| We | will | back-fire |
| They | will | back-fire |
Past Perfect
| I | had | back-fired |
| You | had | back-fired |
| She | had | back-fired |
| We | had | back-fired |
| They | had | back-fired |
Future Perfect
| I | will | have | back-fired |
| You | will | have | back-fired |
| She | will | have | back-fired |
| We | will | have | back-fired |
| They | will | have | back-fired |
Present - Conditional
| I | would | back-fire |
| You | would | back-fire |
| She | would | back-fire |
| We | would | back-fire |
| They | would | back-fire |
Perfect - Conditional
| I | would | have | back-fired |
| You | would | have | back-fired |
| She | would | have | back-fired |
| We | would | have | back-fired |
| They | would | have | back-fired |