Present
| I | retain |
| You | retain |
| She | retains |
| We | retain |
| They | retain |
Past
| I | retained |
| You | retained |
| She | retained |
| We | retained |
| They | retained |
Perfect
| I | have | retained |
| You | have | retained |
| She | has | retained |
| We | have | retained |
| They | have | retained |
Future
| I | will | retain |
| You | will | retain |
| She | will | retain |
| We | will | retain |
| They | will | retain |
Past Perfect
| I | had | retained |
| You | had | retained |
| She | had | retained |
| We | had | retained |
| They | had | retained |
Future Perfect
| I | will | have | retained |
| You | will | have | retained |
| She | will | have | retained |
| We | will | have | retained |
| They | will | have | retained |
Present - Conditional
| I | would | retain |
| You | would | retain |
| She | would | retain |
| We | would | retain |
| They | would | retain |
Perfect - Conditional
| I | would | have | retained |
| You | would | have | retained |
| She | would | have | retained |
| We | would | have | retained |
| They | would | have | retained |