Present
| I | underpay |
| You | underpay |
| She | underpays |
| We | underpay |
| They | underpay |
Past
| I | underpaid |
| You | underpaid |
| She | underpaid |
| We | underpaid |
| They | underpaid |
Perfect
| I | have | underpaid |
| You | have | underpaid |
| She | has | underpaid |
| We | have | underpaid |
| They | have | underpaid |
Future
| I | will | underpay |
| You | will | underpay |
| She | will | underpay |
| We | will | underpay |
| They | will | underpay |
Past Perfect
| I | had | underpaid |
| You | had | underpaid |
| She | had | underpaid |
| We | had | underpaid |
| They | had | underpaid |
Future Perfect
| I | will | have | underpaid |
| You | will | have | underpaid |
| She | will | have | underpaid |
| We | will | have | underpaid |
| They | will | have | underpaid |
Present - Conditional
| I | would | underpay |
| You | would | underpay |
| She | would | underpay |
| We | would | underpay |
| They | would | underpay |
Perfect - Conditional
| I | would | have | underpaid |
| You | would | have | underpaid |
| She | would | have | underpaid |
| We | would | have | underpaid |
| They | would | have | underpaid |