Present
| I | slack |
| You | slack |
| She | slacks |
| We | slack |
| They | slack |
Past
| I | slacked |
| You | slacked |
| She | slacked |
| We | slacked |
| They | slacked |
Perfect
| I | have | slacked |
| You | have | slacked |
| She | has | slacked |
| We | have | slacked |
| They | have | slacked |
Future
| I | will | slack |
| You | will | slack |
| She | will | slack |
| We | will | slack |
| They | will | slack |
Past Perfect
| I | had | slacked |
| You | had | slacked |
| She | had | slacked |
| We | had | slacked |
| They | had | slacked |
Future Perfect
| I | will | have | slacked |
| You | will | have | slacked |
| She | will | have | slacked |
| We | will | have | slacked |
| They | will | have | slacked |
Present - Conditional
| I | would | slack |
| You | would | slack |
| She | would | slack |
| We | would | slack |
| They | would | slack |
Perfect - Conditional
| I | would | have | slacked |
| You | would | have | slacked |
| She | would | have | slacked |
| We | would | have | slacked |
| They | would | have | slacked |