| I | countersign |
| you | countersign |
| he/she/it | countersigns |
| we | countersign |
| you | countersign |
| they | countersign |
| I | have countersigned |
| you | have countersigned |
| he/she/it | has countersigned |
| we | have countersigned |
| you | have countersigned |
| they | have countersigned |
| I | countersigned |
| you | countersigned |
| he/she/it | countersigned |
| we | countersigned |
| you | countersigned |
| they | countersigned |
| I | had countersigned |
| you | had countersigned |
| he/she/it | had countersigned |
| we | had countersigned |
| you | had countersigned |
| they | had countersigned |
| I | will countersign |
| you | will countersign |
| he/she/it | will countersign |
| we | will countersign |
| you | will countersign |
| they | will countersign |
| I | will have countersigned |
| you | will have countersigned |
| he/she/it | will have countersigned |
| we | will have countersigned |
| you | will have countersigned |
| they | will have countersigned |
| I | am countersigning |
| you | are countersigning |
| he/she/it | is countersigning |
| we | are countersigning |
| you | are countersigning |
| they | are countersigning |
| I | have been countersigning |
| you | have been countersigning |
| he/she/it | has been countersigning |
| we | have been countersigning |
| you | have been countersigning |
| they | have been countersigning |
| I | was countersigning |
| you | were countersigning |
| he/she/it | was countersigning |
| we | were countersigning |
| you | were countersigning |
| they | were countersigning |
| I | had been countersigning |
| you | had been countersigning |
| he/she/it | had been countersigning |
| we | had been countersigning |
| you | had been countersigning |
| they | had been countersigning |
| I | will be countersigning |
| you | will be countersigning |
| he/she/it | will be countersigning |
| we | will be countersigning |
| you | will be countersigning |
| they | will be countersigning |
| I | will have been countersigning |
| you | will have been countersigning |
| he/she/it | will have been countersigning |
| we | will have been countersigning |
| you | will have been countersigning |
| they | will have been countersigning |
| I | would countersign |
| you | would countersign |
| he/she/it | would countersign |
| we | would countersign |
| you | would countersign |
| they | would countersign |
| I | would have countersigned |
| you | would have countersigned |
| he/she/it | would have countersigned |
| we | would have countersigned |
| you | would have countersigned |
| they | would have countersigned |
| I | would be countersigning |
| you | would be countersigning |
| he/she/it | would be countersigning |
| we | would be countersigning |
| you | would be countersigning |
| they | would be countersigning |
| I | would have been countersigning |
| you | would have been countersigning |
| he/she/it | would have been countersigning |
| we | would have been countersigning |
| you | would have been countersigning |
| they | would have been countersigning |
| You | countersign |
| we | Let's countersign |
| You | countersign |