Present
| I | gainsay |
| You | gainsay |
| She | gainsays |
| We | gainsay |
| They | gainsay |
Past
| I | gainsaid |
| You | gainsaid |
| She | gainsaid |
| We | gainsaid |
| They | gainsaid |
Perfect
| I | have | gainsaid |
| You | have | gainsaid |
| She | has | gainsaid |
| We | have | gainsaid |
| They | have | gainsaid |
Future
| I | will | gainsay |
| You | will | gainsay |
| She | will | gainsay |
| We | will | gainsay |
| They | will | gainsay |
Past Perfect
| I | had | gainsaid |
| You | had | gainsaid |
| She | had | gainsaid |
| We | had | gainsaid |
| They | had | gainsaid |
Future Perfect
| I | will | have | gainsaid |
| You | will | have | gainsaid |
| She | will | have | gainsaid |
| We | will | have | gainsaid |
| They | will | have | gainsaid |
Present - Conditional
| I | would | gainsay |
| You | would | gainsay |
| She | would | gainsay |
| We | would | gainsay |
| They | would | gainsay |
Perfect - Conditional
| I | would | have | gainsaid |
| You | would | have | gainsaid |
| She | would | have | gainsaid |
| We | would | have | gainsaid |
| They | would | have | gainsaid |