Present
| I | concuss |
| You | concuss |
| She | concusses |
| We | concuss |
| They | concuss |
Past
| I | concussed |
| You | concussed |
| She | concussed |
| We | concussed |
| They | concussed |
Perfect
| I | have | concussed |
| You | have | concussed |
| She | has | concussed |
| We | have | concussed |
| They | have | concussed |
Future
| I | will | concuss |
| You | will | concuss |
| She | will | concuss |
| We | will | concuss |
| They | will | concuss |
Past Perfect
| I | had | concussed |
| You | had | concussed |
| She | had | concussed |
| We | had | concussed |
| They | had | concussed |
Future Perfect
| I | will | have | concussed |
| You | will | have | concussed |
| She | will | have | concussed |
| We | will | have | concussed |
| They | will | have | concussed |
Present - Conditional
| I | would | concuss |
| You | would | concuss |
| She | would | concuss |
| We | would | concuss |
| They | would | concuss |
Perfect - Conditional
| I | would | have | concussed |
| You | would | have | concussed |
| She | would | have | concussed |
| We | would | have | concussed |
| They | would | have | concussed |