Present
| I | sweeten |
| You | sweeten |
| She | sweetens |
| We | sweeten |
| They | sweeten |
Past
| I | sweetened |
| You | sweetened |
| She | sweetened |
| We | sweetened |
| They | sweetened |
Perfect
| I | have | sweetened |
| You | have | sweetened |
| She | has | sweetened |
| We | have | sweetened |
| They | have | sweetened |
Future
| I | will | sweeten |
| You | will | sweeten |
| She | will | sweeten |
| We | will | sweeten |
| They | will | sweeten |
Past Perfect
| I | had | sweetened |
| You | had | sweetened |
| She | had | sweetened |
| We | had | sweetened |
| They | had | sweetened |
Future Perfect
| I | will | have | sweetened |
| You | will | have | sweetened |
| She | will | have | sweetened |
| We | will | have | sweetened |
| They | will | have | sweetened |
Present - Conditional
| I | would | sweeten |
| You | would | sweeten |
| She | would | sweeten |
| We | would | sweeten |
| They | would | sweeten |
Perfect - Conditional
| I | would | have | sweetened |
| You | would | have | sweetened |
| She | would | have | sweetened |
| We | would | have | sweetened |
| They | would | have | sweetened |