Present
| I | straighten |
| You | straighten |
| She | straightens |
| We | straighten |
| They | straighten |
Past
| I | straightened |
| You | straightened |
| She | straightened |
| We | straightened |
| They | straightened |
Perfect
| I | have | straightened |
| You | have | straightened |
| She | has | straightened |
| We | have | straightened |
| They | have | straightened |
Future
| I | will | straighten |
| You | will | straighten |
| She | will | straighten |
| We | will | straighten |
| They | will | straighten |
Past Perfect
| I | had | straightened |
| You | had | straightened |
| She | had | straightened |
| We | had | straightened |
| They | had | straightened |
Future Perfect
| I | will | have | straightened |
| You | will | have | straightened |
| She | will | have | straightened |
| We | will | have | straightened |
| They | will | have | straightened |
Present - Conditional
| I | would | straighten |
| You | would | straighten |
| She | would | straighten |
| We | would | straighten |
| They | would | straighten |
Perfect - Conditional
| I | would | have | straightened |
| You | would | have | straightened |
| She | would | have | straightened |
| We | would | have | straightened |
| They | would | have | straightened |