Present
| I | antedate |
| You | antedate |
| She | antedates |
| We | antedate |
| They | antedate |
Past
| I | antedated |
| You | antedated |
| She | antedated |
| We | antedated |
| They | antedated |
Perfect
| I | have | antedated |
| You | have | antedated |
| She | has | antedated |
| We | have | antedated |
| They | have | antedated |
Future
| I | will | antedate |
| You | will | antedate |
| She | will | antedate |
| We | will | antedate |
| They | will | antedate |
Past Perfect
| I | had | antedated |
| You | had | antedated |
| She | had | antedated |
| We | had | antedated |
| They | had | antedated |
Future Perfect
| I | will | have | antedated |
| You | will | have | antedated |
| She | will | have | antedated |
| We | will | have | antedated |
| They | will | have | antedated |
Present - Conditional
| I | would | antedate |
| You | would | antedate |
| She | would | antedate |
| We | would | antedate |
| They | would | antedate |
Perfect - Conditional
| I | would | have | antedated |
| You | would | have | antedated |
| She | would | have | antedated |
| We | would | have | antedated |
| They | would | have | antedated |