Present
| I | prolong |
| You | prolong |
| She | prolongs |
| We | prolong |
| They | prolong |
Past
| I | prolonged |
| You | prolonged |
| She | prolonged |
| We | prolonged |
| They | prolonged |
Perfect
| I | have | prolonged |
| You | have | prolonged |
| She | has | prolonged |
| We | have | prolonged |
| They | have | prolonged |
Future
| I | will | prolong |
| You | will | prolong |
| She | will | prolong |
| We | will | prolong |
| They | will | prolong |
Past Perfect
| I | had | prolonged |
| You | had | prolonged |
| She | had | prolonged |
| We | had | prolonged |
| They | had | prolonged |
Future Perfect
| I | will | have | prolonged |
| You | will | have | prolonged |
| She | will | have | prolonged |
| We | will | have | prolonged |
| They | will | have | prolonged |
Present - Conditional
| I | would | prolong |
| You | would | prolong |
| She | would | prolong |
| We | would | prolong |
| They | would | prolong |
Perfect - Conditional
| I | would | have | prolonged |
| You | would | have | prolonged |
| She | would | have | prolonged |
| We | would | have | prolonged |
| They | would | have | prolonged |