| Present "undo / undoes" | I | undo | |
| Present Continuous "undo / undoes" | I | am undoing | |
| Simple past "undo / undoes" | I | undid | |
| Past Continuous "undo / undoes" | I | was undoing | |
| Present perfect "undo / undoes" | I | have undone | |
| Present perfect continuous "undo / undoes" | I | have been undoing | |
| Past perfect "undo / undoes" | I | had undone | |
| Past perfect continuous "undo / undoes" | I | had been undoing | |
| Future "undo / undoes" | I | will undo | |
| Future continuous "undo / undoes" | I | will be undoing | |
| Future perfect "undo / undoes" | I | will have undone | |
| Future perfect continuous "undo / undoes" | I | will have been undoing |