Total verb forms: 51
| Imperatives and participles |
| Present Participle | concerning |
| Present Participle | concerned |
| Imperative | concern |
| Type | I | you | he/she/it | we | you | they |
| Present | concern | concern | concerns | concern | concern | concern |
| Past | concerned | concerned | concerned | concerned | concerned | concerned |
| Future | will concern | will concern | will concern | will concern | will concern | will concern |
| Present conditional | would concern | would concern | would concern | would concern | would concern | would concern |
| Past conditional | would have concerned | would have concerned | would have concerned | would have concerned | would have concerned | would have concerned |
| Present Perfect | have concerned | have concerned | has concerned | have concerned | have concerned | have concerned |
| Past Perfect | had concerned | had concerned | had concerned | had concerned | had concerned | had concerned |
| Future Perfect | will have concerned | will have concerned | will have concerned | will have concerned | will have concerned | will have concerned |
Conjugated verbs before and after concern
