Present
| I | redouble |
| You | redouble |
| She | redoubles |
| We | redouble |
| They | redouble |
Past
| I | redoubled |
| You | redoubled |
| She | redoubled |
| We | redoubled |
| They | redoubled |
Perfect
| I | have | redoubled |
| You | have | redoubled |
| She | has | redoubled |
| We | have | redoubled |
| They | have | redoubled |
Future
| I | will | redouble |
| You | will | redouble |
| She | will | redouble |
| We | will | redouble |
| They | will | redouble |
Past Perfect
| I | had | redoubled |
| You | had | redoubled |
| She | had | redoubled |
| We | had | redoubled |
| They | had | redoubled |
Future Perfect
| I | will | have | redoubled |
| You | will | have | redoubled |
| She | will | have | redoubled |
| We | will | have | redoubled |
| They | will | have | redoubled |
Present - Conditional
| I | would | redouble |
| You | would | redouble |
| She | would | redouble |
| We | would | redouble |
| They | would | redouble |
Perfect - Conditional
| I | would | have | redoubled |
| You | would | have | redoubled |
| She | would | have | redoubled |
| We | would | have | redoubled |
| They | would | have | redoubled |