Present
| I | economise |
| You | economise |
| She | economises |
| We | economise |
| They | economise |
Past
| I | economised |
| You | economised |
| She | economised |
| We | economised |
| They | economised |
Perfect
| I | have | economised |
| You | have | economised |
| She | has | economised |
| We | have | economised |
| They | have | economised |
Future
| I | will | economise |
| You | will | economise |
| She | will | economise |
| We | will | economise |
| They | will | economise |
Past Perfect
| I | had | economised |
| You | had | economised |
| She | had | economised |
| We | had | economised |
| They | had | economised |
Future Perfect
| I | will | have | economised |
| You | will | have | economised |
| She | will | have | economised |
| We | will | have | economised |
| They | will | have | economised |
Present - Conditional
| I | would | economise |
| You | would | economise |
| She | would | economise |
| We | would | economise |
| They | would | economise |
Perfect - Conditional
| I | would | have | economised |
| You | would | have | economised |
| She | would | have | economised |
| We | would | have | economised |
| They | would | have | economised |