Present
| I | concern |
| You | concern |
| She | concerns |
| We | concern |
| They | concern |
Past
| I | concerned |
| You | concerned |
| She | concerned |
| We | concerned |
| They | concerned |
Perfect
| I | have | concerned |
| You | have | concerned |
| She | has | concerned |
| We | have | concerned |
| They | have | concerned |
Future
| I | will | concern |
| You | will | concern |
| She | will | concern |
| We | will | concern |
| They | will | concern |
Past Perfect
| I | had | concerned |
| You | had | concerned |
| She | had | concerned |
| We | had | concerned |
| They | had | concerned |
Future Perfect
| I | will | have | concerned |
| You | will | have | concerned |
| She | will | have | concerned |
| We | will | have | concerned |
| They | will | have | concerned |
Present - Conditional
| I | would | concern |
| You | would | concern |
| She | would | concern |
| We | would | concern |
| They | would | concern |
Perfect - Conditional
| I | would | have | concerned |
| You | would | have | concerned |
| She | would | have | concerned |
| We | would | have | concerned |
| They | would | have | concerned |