Present
| I | flounder |
| You | flounder |
| She | flounders |
| We | flounder |
| They | flounder |
Past
| I | floundered |
| You | floundered |
| She | floundered |
| We | floundered |
| They | floundered |
Perfect
| I | have | floundered |
| You | have | floundered |
| She | has | floundered |
| We | have | floundered |
| They | have | floundered |
Future
| I | will | flounder |
| You | will | flounder |
| She | will | flounder |
| We | will | flounder |
| They | will | flounder |
Past Perfect
| I | had | floundered |
| You | had | floundered |
| She | had | floundered |
| We | had | floundered |
| They | had | floundered |
Future Perfect
| I | will | have | floundered |
| You | will | have | floundered |
| She | will | have | floundered |
| We | will | have | floundered |
| They | will | have | floundered |
Present - Conditional
| I | would | flounder |
| You | would | flounder |
| She | would | flounder |
| We | would | flounder |
| They | would | flounder |
Perfect - Conditional
| I | would | have | floundered |
| You | would | have | floundered |
| She | would | have | floundered |
| We | would | have | floundered |
| They | would | have | floundered |