Present
| I | sustain |
| You | sustain |
| She | sustains |
| We | sustain |
| They | sustain |
Past
| I | sustained |
| You | sustained |
| She | sustained |
| We | sustained |
| They | sustained |
Perfect
| I | have | sustained |
| You | have | sustained |
| She | has | sustained |
| We | have | sustained |
| They | have | sustained |
Future
| I | will | sustain |
| You | will | sustain |
| She | will | sustain |
| We | will | sustain |
| They | will | sustain |
Past Perfect
| I | had | sustained |
| You | had | sustained |
| She | had | sustained |
| We | had | sustained |
| They | had | sustained |
Future Perfect
| I | will | have | sustained |
| You | will | have | sustained |
| She | will | have | sustained |
| We | will | have | sustained |
| They | will | have | sustained |
Present - Conditional
| I | would | sustain |
| You | would | sustain |
| She | would | sustain |
| We | would | sustain |
| They | would | sustain |
Perfect - Conditional
| I | would | have | sustained |
| You | would | have | sustained |
| She | would | have | sustained |
| We | would | have | sustained |
| They | would | have | sustained |