Present
| I | forestall |
| You | forestall |
| She | forestalls |
| We | forestall |
| They | forestall |
Past
| I | forestalled |
| You | forestalled |
| She | forestalled |
| We | forestalled |
| They | forestalled |
Perfect
| I | have | forestalled |
| You | have | forestalled |
| She | has | forestalled |
| We | have | forestalled |
| They | have | forestalled |
Future
| I | will | forestall |
| You | will | forestall |
| She | will | forestall |
| We | will | forestall |
| They | will | forestall |
Past Perfect
| I | had | forestalled |
| You | had | forestalled |
| She | had | forestalled |
| We | had | forestalled |
| They | had | forestalled |
Future Perfect
| I | will | have | forestalled |
| You | will | have | forestalled |
| She | will | have | forestalled |
| We | will | have | forestalled |
| They | will | have | forestalled |
Present - Conditional
| I | would | forestall |
| You | would | forestall |
| She | would | forestall |
| We | would | forestall |
| They | would | forestall |
Perfect - Conditional
| I | would | have | forestalled |
| You | would | have | forestalled |
| She | would | have | forestalled |
| We | would | have | forestalled |
| They | would | have | forestalled |