| I | jackknife |
| you | jackknife |
| he/she/it | jackknifes |
| we | jackknife |
| you | jackknife |
| they | jackknife |
| I | have jackknifed |
| you | have jackknifed |
| he/she/it | has jackknifed |
| we | have jackknifed |
| you | have jackknifed |
| they | have jackknifed |
| I | jackknifed |
| you | jackknifed |
| he/she/it | jackknifed |
| we | jackknifed |
| you | jackknifed |
| they | jackknifed |
| I | had jackknifed |
| you | had jackknifed |
| he/she/it | had jackknifed |
| we | had jackknifed |
| you | had jackknifed |
| they | had jackknifed |
| I | will jackknife |
| you | will jackknife |
| he/she/it | will jackknife |
| we | will jackknife |
| you | will jackknife |
| they | will jackknife |
| I | will have jackknifed |
| you | will have jackknifed |
| he/she/it | will have jackknifed |
| we | will have jackknifed |
| you | will have jackknifed |
| they | will have jackknifed |
| I | am jackknifing |
| you | are jackknifing |
| he/she/it | is jackknifing |
| we | are jackknifing |
| you | are jackknifing |
| they | are jackknifing |
| I | have been jackknifing |
| you | have been jackknifing |
| he/she/it | has been jackknifing |
| we | have been jackknifing |
| you | have been jackknifing |
| they | have been jackknifing |
| I | was jackknifing |
| you | were jackknifing |
| he/she/it | was jackknifing |
| we | were jackknifing |
| you | were jackknifing |
| they | were jackknifing |
| I | had been jackknifing |
| you | had been jackknifing |
| he/she/it | had been jackknifing |
| we | had been jackknifing |
| you | had been jackknifing |
| they | had been jackknifing |
| I | will be jackknifing |
| you | will be jackknifing |
| he/she/it | will be jackknifing |
| we | will be jackknifing |
| you | will be jackknifing |
| they | will be jackknifing |
| I | will have been jackknifing |
| you | will have been jackknifing |
| he/she/it | will have been jackknifing |
| we | will have been jackknifing |
| you | will have been jackknifing |
| they | will have been jackknifing |
| I | would jackknife |
| you | would jackknife |
| he/she/it | would jackknife |
| we | would jackknife |
| you | would jackknife |
| they | would jackknife |
| I | would have jackknifed |
| you | would have jackknifed |
| he/she/it | would have jackknifed |
| we | would have jackknifed |
| you | would have jackknifed |
| they | would have jackknifed |
| I | would be jackknifing |
| you | would be jackknifing |
| he/she/it | would be jackknifing |
| we | would be jackknifing |
| you | would be jackknifing |
| they | would be jackknifing |
| I | would have been jackknifing |
| you | would have been jackknifing |
| he/she/it | would have been jackknifing |
| we | would have been jackknifing |
| you | would have been jackknifing |
| they | would have been jackknifing |
| You | jackknife |
| we | Let's jackknife |
| You | jackknife |