Present
| I | sharpen |
| You | sharpen |
| She | sharpens |
| We | sharpen |
| They | sharpen |
Past
| I | sharpened |
| You | sharpened |
| She | sharpened |
| We | sharpened |
| They | sharpened |
Perfect
| I | have | sharpened |
| You | have | sharpened |
| She | has | sharpened |
| We | have | sharpened |
| They | have | sharpened |
Future
| I | will | sharpen |
| You | will | sharpen |
| She | will | sharpen |
| We | will | sharpen |
| They | will | sharpen |
Past Perfect
| I | had | sharpened |
| You | had | sharpened |
| She | had | sharpened |
| We | had | sharpened |
| They | had | sharpened |
Future Perfect
| I | will | have | sharpened |
| You | will | have | sharpened |
| She | will | have | sharpened |
| We | will | have | sharpened |
| They | will | have | sharpened |
Present - Conditional
| I | would | sharpen |
| You | would | sharpen |
| She | would | sharpen |
| We | would | sharpen |
| They | would | sharpen |
Perfect - Conditional
| I | would | have | sharpened |
| You | would | have | sharpened |
| She | would | have | sharpened |
| We | would | have | sharpened |
| They | would | have | sharpened |