Present
| I | deteriorate |
| You | deteriorate |
| She | deteriorates |
| We | deteriorate |
| They | deteriorate |
Past
| I | deteriorated |
| You | deteriorated |
| She | deteriorated |
| We | deteriorated |
| They | deteriorated |
Perfect
| I | have | deteriorated |
| You | have | deteriorated |
| She | has | deteriorated |
| We | have | deteriorated |
| They | have | deteriorated |
Future
| I | will | deteriorate |
| You | will | deteriorate |
| She | will | deteriorate |
| We | will | deteriorate |
| They | will | deteriorate |
Past Perfect
| I | had | deteriorated |
| You | had | deteriorated |
| She | had | deteriorated |
| We | had | deteriorated |
| They | had | deteriorated |
Future Perfect
| I | will | have | deteriorated |
| You | will | have | deteriorated |
| She | will | have | deteriorated |
| We | will | have | deteriorated |
| They | will | have | deteriorated |
Present - Conditional
| I | would | deteriorate |
| You | would | deteriorate |
| She | would | deteriorate |
| We | would | deteriorate |
| They | would | deteriorate |
Perfect - Conditional
| I | would | have | deteriorated |
| You | would | have | deteriorated |
| She | would | have | deteriorated |
| We | would | have | deteriorated |
| They | would | have | deteriorated |