Present
| I | darken |
| You | darken |
| She | darkens |
| We | darken |
| They | darken |
Past
| I | darkened |
| You | darkened |
| She | darkened |
| We | darkened |
| They | darkened |
Perfect
| I | have | darkened |
| You | have | darkened |
| She | has | darkened |
| We | have | darkened |
| They | have | darkened |
Future
| I | will | darken |
| You | will | darken |
| She | will | darken |
| We | will | darken |
| They | will | darken |
Past Perfect
| I | had | darkened |
| You | had | darkened |
| She | had | darkened |
| We | had | darkened |
| They | had | darkened |
Future Perfect
| I | will | have | darkened |
| You | will | have | darkened |
| She | will | have | darkened |
| We | will | have | darkened |
| They | will | have | darkened |
Present - Conditional
| I | would | darken |
| You | would | darken |
| She | would | darken |
| We | would | darken |
| They | would | darken |
Perfect - Conditional
| I | would | have | darkened |
| You | would | have | darkened |
| She | would | have | darkened |
| We | would | have | darkened |
| They | would | have | darkened |