Present
| I | undertake |
| You | undertake |
| She | undertakes |
| We | undertake |
| They | undertake |
Past
| I | undertook |
| You | undertook |
| She | undertook |
| We | undertook |
| They | undertook |
Perfect
| I | have | undertaken |
| You | have | undertaken |
| She | has | undertaken |
| We | have | undertaken |
| They | have | undertaken |
Future
| I | will | undertake |
| You | will | undertake |
| She | will | undertake |
| We | will | undertake |
| They | will | undertake |
Past Perfect
| I | had | undertaken |
| You | had | undertaken |
| She | had | undertaken |
| We | had | undertaken |
| They | had | undertaken |
Future Perfect
| I | will | have | undertaken |
| You | will | have | undertaken |
| She | will | have | undertaken |
| We | will | have | undertaken |
| They | will | have | undertaken |
Present - Conditional
| I | would | undertake |
| You | would | undertake |
| She | would | undertake |
| We | would | undertake |
| They | would | undertake |
Perfect - Conditional
| I | would | have | undertaken |
| You | would | have | undertaken |
| She | would | have | undertaken |
| We | would | have | undertaken |
| They | would | have | undertaken |