Present
| I | flabberghast |
| You | flabberghast |
| She | flabberghasts |
| We | flabberghast |
| They | flabberghast |
Past
| I | flabberghasted |
| You | flabberghasted |
| She | flabberghasted |
| We | flabberghasted |
| They | flabberghasted |
Perfect
| I | have | flabberghasted |
| You | have | flabberghasted |
| She | has | flabberghasted |
| We | have | flabberghasted |
| They | have | flabberghasted |
Future
| I | will | flabberghast |
| You | will | flabberghast |
| She | will | flabberghast |
| We | will | flabberghast |
| They | will | flabberghast |
Past Perfect
| I | had | flabberghasted |
| You | had | flabberghasted |
| She | had | flabberghasted |
| We | had | flabberghasted |
| They | had | flabberghasted |
Future Perfect
| I | will | have | flabberghasted |
| You | will | have | flabberghasted |
| She | will | have | flabberghasted |
| We | will | have | flabberghasted |
| They | will | have | flabberghasted |
Present - Conditional
| I | would | flabberghast |
| You | would | flabberghast |
| She | would | flabberghast |
| We | would | flabberghast |
| They | would | flabberghast |
Perfect - Conditional
| I | would | have | flabberghasted |
| You | would | have | flabberghasted |
| She | would | have | flabberghasted |
| We | would | have | flabberghasted |
| They | would | have | flabberghasted |