Present
| I | authenticate |
| You | authenticate |
| She | authenticates |
| We | authenticate |
| They | authenticate |
Past
| I | authenticated |
| You | authenticated |
| She | authenticated |
| We | authenticated |
| They | authenticated |
Perfect
| I | have | authenticated |
| You | have | authenticated |
| She | has | authenticated |
| We | have | authenticated |
| They | have | authenticated |
Future
| I | will | authenticate |
| You | will | authenticate |
| She | will | authenticate |
| We | will | authenticate |
| They | will | authenticate |
Past Perfect
| I | had | authenticated |
| You | had | authenticated |
| She | had | authenticated |
| We | had | authenticated |
| They | had | authenticated |
Future Perfect
| I | will | have | authenticated |
| You | will | have | authenticated |
| She | will | have | authenticated |
| We | will | have | authenticated |
| They | will | have | authenticated |
Present - Conditional
| I | would | authenticate |
| You | would | authenticate |
| She | would | authenticate |
| We | would | authenticate |
| They | would | authenticate |
Perfect - Conditional
| I | would | have | authenticated |
| You | would | have | authenticated |
| She | would | have | authenticated |
| We | would | have | authenticated |
| They | would | have | authenticated |