Present
| I | quadruple |
| You | quadruple |
| She | quadruples |
| We | quadruple |
| They | quadruple |
Past
| I | quadrupled |
| You | quadrupled |
| She | quadrupled |
| We | quadrupled |
| They | quadrupled |
Perfect
| I | have | quadrupled |
| You | have | quadrupled |
| She | has | quadrupled |
| We | have | quadrupled |
| They | have | quadrupled |
Future
| I | will | quadruple |
| You | will | quadruple |
| She | will | quadruple |
| We | will | quadruple |
| They | will | quadruple |
Past Perfect
| I | had | quadrupled |
| You | had | quadrupled |
| She | had | quadrupled |
| We | had | quadrupled |
| They | had | quadrupled |
Future Perfect
| I | will | have | quadrupled |
| You | will | have | quadrupled |
| She | will | have | quadrupled |
| We | will | have | quadrupled |
| They | will | have | quadrupled |
Present - Conditional
| I | would | quadruple |
| You | would | quadruple |
| She | would | quadruple |
| We | would | quadruple |
| They | would | quadruple |
Perfect - Conditional
| I | would | have | quadrupled |
| You | would | have | quadrupled |
| She | would | have | quadrupled |
| We | would | have | quadrupled |
| They | would | have | quadrupled |