Present
| I | diminish |
| You | diminish |
| She | diminishes |
| We | diminish |
| They | diminish |
Past
| I | diminished |
| You | diminished |
| She | diminished |
| We | diminished |
| They | diminished |
Perfect
| I | have | diminished |
| You | have | diminished |
| She | has | diminished |
| We | have | diminished |
| They | have | diminished |
Future
| I | will | diminish |
| You | will | diminish |
| She | will | diminish |
| We | will | diminish |
| They | will | diminish |
Past Perfect
| I | had | diminished |
| You | had | diminished |
| She | had | diminished |
| We | had | diminished |
| They | had | diminished |
Future Perfect
| I | will | have | diminished |
| You | will | have | diminished |
| She | will | have | diminished |
| We | will | have | diminished |
| They | will | have | diminished |
Present - Conditional
| I | would | diminish |
| You | would | diminish |
| She | would | diminish |
| We | would | diminish |
| They | would | diminish |
Perfect - Conditional
| I | would | have | diminished |
| You | would | have | diminished |
| She | would | have | diminished |
| We | would | have | diminished |
| They | would | have | diminished |