| Present | Past | Future | |
|---|---|---|---|
| I | concern | concerned | will concern |
| you | concern | concerned | will concern |
| he/she | concerns | concerned | will concern |
| we | concern | concerned | will concern |
| you | concern | concerned | will concern |
| they | concern | concerned | will concern |
| I | concern |
| you | concern |
| he/she | concerns |
| we | concern |
| you | concern |
| they | concern |
| I | concerned |
| you | concerned |
| he/she | concerned |
| we | concerned |
| you | concerned |
| they | concerned |
| I | will concern |
| you | will concern |
| he/she | will concern |
| we | will concern |
| you | will concern |
| they | will concern |
| Present | Past | Future | |
|---|---|---|---|
| I | have concerned | had concerned | will have concerned |
| you | have concerned | had concerned | will have concerned |
| he/she | has concerned | had concerned | will have concerned |
| we | have concerned | had concerned | will have concerned |
| you | have concerned | had concerned | will have concerned |
| they | have concerned | had concerned | will have concerned |
| I | have concerned |
| you | have concerned |
| he/she | has concerned |
| we | have concerned |
| you | have concerned |
| they | have concerned |
| I | had concerned |
| you | had concerned |
| he/she | had concerned |
| we | had concerned |
| you | had concerned |
| they | had concerned |
| I | will have concerned |
| you | will have concerned |
| he/she | will have concerned |
| we | will have concerned |
| you | will have concerned |
| they | will have concerned |
| Imperative | |
|---|---|
| I | - |
| you | concern |
| he/she | - |
| we | - |
| you | concern |
| they | - |
| I | - |
| you | concern |
| he/she | - |
| we | - |
| you | concern |
| they | - |
| Present | Past | Future | |
|---|---|---|---|
| I | am concerning | was concerning | will be concerning |
| you | are concerning | were concerning | will be concerning |
| he/she | is concerning | was concerning | will be concerning |
| we | are concerning | were concerning | will be concerning |
| you | are concerning | were concerning | will be concerning |
| they | are concerning | were concerning | will be concerning |
| I | am concerning |
| you | are concerning |
| he/she | is concerning |
| we | are concerning |
| you | are concerning |
| they | are concerning |
| I | was concerning |
| you | were concerning |
| he/she | was concerning |
| we | were concerning |
| you | were concerning |
| they | were concerning |
| I | will be concerning |
| you | will be concerning |
| he/she | will be concerning |
| we | will be concerning |
| you | will be concerning |
| they | will be concerning |
| Present | Past | Future | |
|---|---|---|---|
| I | have been concerning | had been concerning | will have been concerning |
| you | have been concerning | had been concerning | will have been concerning |
| he/she | has been concerning | had been concerning | will have been concerning |
| we | have been concerning | had been concerning | will have been concerning |
| you | have been concerning | had been concerning | will have been concerning |
| they | have been concerning | had been concerning | will have been concerning |
| I | have been concerning |
| you | have been concerning |
| he/she | has been concerning |
| we | have been concerning |
| you | have been concerning |
| they | have been concerning |
| I | had been concerning |
| you | had been concerning |
| he/she | had been concerning |
| we | had been concerning |
| you | had been concerning |
| they | had been concerning |
| I | will have been concerning |
| you | will have been concerning |
| he/she | will have been concerning |
| we | will have been concerning |
| you | will have been concerning |
| they | will have been concerning |