Present
| I | tighten |
| You | tighten |
| She | tightens |
| We | tighten |
| They | tighten |
Past
| I | tightened |
| You | tightened |
| She | tightened |
| We | tightened |
| They | tightened |
Perfect
| I | have | tightened |
| You | have | tightened |
| She | has | tightened |
| We | have | tightened |
| They | have | tightened |
Future
| I | will | tighten |
| You | will | tighten |
| She | will | tighten |
| We | will | tighten |
| They | will | tighten |
Past Perfect
| I | had | tightened |
| You | had | tightened |
| She | had | tightened |
| We | had | tightened |
| They | had | tightened |
Future Perfect
| I | will | have | tightened |
| You | will | have | tightened |
| She | will | have | tightened |
| We | will | have | tightened |
| They | will | have | tightened |
Present - Conditional
| I | would | tighten |
| You | would | tighten |
| She | would | tighten |
| We | would | tighten |
| They | would | tighten |
Perfect - Conditional
| I | would | have | tightened |
| You | would | have | tightened |
| She | would | have | tightened |
| We | would | have | tightened |
| They | would | have | tightened |