Present
| I | endeavour |
| You | endeavour |
| She | endeavours |
| We | endeavour |
| They | endeavour |
Past
| I | endeavoured |
| You | endeavoured |
| She | endeavoured |
| We | endeavoured |
| They | endeavoured |
Perfect
| I | have | endeavoured |
| You | have | endeavoured |
| She | has | endeavoured |
| We | have | endeavoured |
| They | have | endeavoured |
Future
| I | will | endeavour |
| You | will | endeavour |
| She | will | endeavour |
| We | will | endeavour |
| They | will | endeavour |
Past Perfect
| I | had | endeavoured |
| You | had | endeavoured |
| She | had | endeavoured |
| We | had | endeavoured |
| They | had | endeavoured |
Future Perfect
| I | will | have | endeavoured |
| You | will | have | endeavoured |
| She | will | have | endeavoured |
| We | will | have | endeavoured |
| They | will | have | endeavoured |
Present - Conditional
| I | would | endeavour |
| You | would | endeavour |
| She | would | endeavour |
| We | would | endeavour |
| They | would | endeavour |
Perfect - Conditional
| I | would | have | endeavoured |
| You | would | have | endeavoured |
| She | would | have | endeavoured |
| We | would | have | endeavoured |
| They | would | have | endeavoured |