Present
| I | decongest |
| You | decongest |
| She | decongests |
| We | decongest |
| They | decongest |
Past
| I | decongested |
| You | decongested |
| She | decongested |
| We | decongested |
| They | decongested |
Perfect
| I | have | decongested |
| You | have | decongested |
| She | has | decongested |
| We | have | decongested |
| They | have | decongested |
Future
| I | will | decongest |
| You | will | decongest |
| She | will | decongest |
| We | will | decongest |
| They | will | decongest |
Past Perfect
| I | had | decongested |
| You | had | decongested |
| She | had | decongested |
| We | had | decongested |
| They | had | decongested |
Future Perfect
| I | will | have | decongested |
| You | will | have | decongested |
| She | will | have | decongested |
| We | will | have | decongested |
| They | will | have | decongested |
Present - Conditional
| I | would | decongest |
| You | would | decongest |
| She | would | decongest |
| We | would | decongest |
| They | would | decongest |
Perfect - Conditional
| I | would | have | decongested |
| You | would | have | decongested |
| She | would | have | decongested |
| We | would | have | decongested |
| They | would | have | decongested |