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English conjugation of the verb "to jackknife" in Present Simple Tense
Simple Forms

Basic Forms

  • Infinitive
  • to jackknife
  •  
  • Imperative
  • jackknife
  • let's jackknife
  • jackknife
  • Present Participle
  • jackknifing
  •  
  • Past Participle
  • jackknifed
  •  
Indicative:

Present

  • I jackknife
  • you jackknife
  • he/she/it jackknifes
  • we jackknife
  • you jackknife
  • they jackknife

Past

  • I jackknifed
  • you jackknifed
  • he/she/it jackknifed
  • we jackknifed
  • you jackknifed
  • they jackknifed

Compound Forms

Past Participle

  • having jackknifed
Indicative

Present continuous

  • I am jackknifing
  • you are jackknifing
  • he/she/it is jackknifing
  • we are jackknifing
  • you are jackknifing
  • they are jackknifing

Present perfect

  • I have jackknifed
  • you have jackknifed
  • he/she/it has jackknifed
  • we have jackknifed
  • you have jackknifed
  • they have jackknifed

Future

  • I will jackknife
  • you will jackknife
  • he/she/it will jackknife
  • we will jackknife
  • you will jackknife
  • they will jackknife

Future Perfect

  • 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

Past continuous

  • I was jackknifing
  • you were jackknifing
  • he/she/it was jackknifing
  • we were jackknifing
  • you were jackknifing
  • they were jackknifing

Past perfect

  • I had jackknifed
  • you had jackknifed
  • he/she/it had jackknifed
  • we had jackknifed
  • you had jackknifed
  • they had jackknifed

Future continuous

  • 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

Present perfect continuous

  • 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

Past perfect continuous

  • 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

Future perfect continuous

  • 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

Basic Forms

  • Infinitive
  • not to jackknife
  •  
  • Imperative
  • do not jackknife
  • let's not jackknife
  • do not jackknife
  • Present Participle
  • not jackknifing
  •  
  • Past Participle
  • not jackknifed
  •  

Present

  • I do not jackknife
  • you do not jackknife
  • he/she/it does not jackknife
  • we do not jackknife
  • you do not jackknife
  • they do not jackknife

Past

  • I did not jackknife
  • you did not jackknife
  • he/she/it did not jackknife
  • we did not jackknife
  • you did not jackknife
  • they did not jackknife

Past Participle

  • not having jackknifed

Present continuous

  • I am not jackknifing
  • you are not jackknifing
  • he/she/it is not jackknifing
  • we are not jackknifing
  • you are not jackknifing
  • they are not jackknifing

Present perfect

  • I have not jackknifed
  • you have not jackknifed
  • he/she/it has not jackknifed
  • we have not jackknifed
  • you have not jackknifed
  • they have not jackknifed

Future

  • I will not jackknife
  • you will not jackknife
  • he/she/it will not jackknife
  • we will not jackknife
  • you will not jackknife
  • they will not jackknife

Future Perfect

  • I will not have jackknifed
  • you will not have jackknifed
  • he/she/it will not have jackknifed
  • we will not have jackknifed
  • you will not have jackknifed
  • they will not have jackknifed

Past continuous

  • I was not jackknifing
  • you were not jackknifing
  • he/she/it was not jackknifing
  • we were not jackknifing
  • you were not jackknifing
  • they were not jackknifing

Past perfect

  • I had not jackknifed
  • you had not jackknifed
  • he/she/it had not jackknifed
  • we had not jackknifed
  • you had not jackknifed
  • they had not jackknifed

Future continuous

  • I will not be jackknifing
  • you will not be jackknifing
  • he/she/it will not be jackknifing
  • we will not be jackknifing
  • you will not be jackknifing
  • they will not be jackknifing

Present perfect continuous

  • I have not been jackknifing
  • you have not been jackknifing
  • he/she/it has not been jackknifing
  • we have not been jackknifing
  • you have not been jackknifing
  • they have not been jackknifing

Past perfect continuous

  • I had not been jackknifing
  • you had not been jackknifing
  • he/she/it had not been jackknifing
  • we had not been jackknifing
  • you had not been jackknifing
  • they had not been jackknifing

Future perfect continuous

  • I will not have been jackknifing
  • you will not have been jackknifing
  • he/she/it will not have been jackknifing
  • we will not have been jackknifing
  • you will not have been jackknifing
  • they will not have been jackknifing
Indicative:

Present

  • do I jackknife ?
  • do you jackknife ?
  • does he/she/it jackknife ?
  • do we jackknife ?
  • do you jackknife ?
  • do they jackknife ?

Past

  • did I jackknife ?
  • did you jackknife ?
  • did he/she/it jackknife ?
  • did we jackknife ?
  • did you jackknife ?
  • did they jackknife ?
Indicative

Present continuous

  • am I jackknifing ?
  • are you jackknifing ?
  • is he/she/it jackknifing ?
  • are we jackknifing ?
  • are you jackknifing ?
  • are they jackknifing ?

Present perfect

  • have I jackknifed ?
  • have you jackknifed ?
  • has he/she/it jackknifed ?
  • have we jackknifed ?
  • have you jackknifed ?
  • have they jackknifed ?

Future

  • will I jackknife ?
  • will you jackknife ?
  • will he/she/it jackknife ?
  • will we jackknife ?
  • will you jackknife ?
  • will they jackknife ?

Future Perfect

  • will I have jackknifed ?
  • will you have jackknifed ?
  • will he/she/it have jackknifed ?
  • will we have jackknifed ?
  • will you have jackknifed ?
  • will they have jackknifed ?

Past continuous

  • was I jackknifing ?
  • were you jackknifing ?
  • was he/she/it jackknifing ?
  • were we jackknifing ?
  • were you jackknifing ?
  • were they jackknifing ?

Past perfect

  • had I jackknifed ?
  • had you jackknifed ?
  • had he/she/it jackknifed ?
  • had we jackknifed ?
  • had you jackknifed ?
  • had they jackknifed ?

Future continuous

  • will I be jackknifing ?
  • will you be jackknifing ?
  • will he/she/it be jackknifing ?
  • will we be jackknifing ?
  • will you be jackknifing ?
  • will they be jackknifing ?

Present perfect continuous

  • have I been jackknifing ?
  • have you been jackknifing ?
  • has he/she/it been jackknifing ?
  • have we been jackknifing ?
  • have you been jackknifing ?
  • have they been jackknifing ?

Past perfect continuous

  • had I been jackknifing ?
  • had you been jackknifing ?
  • had he/she/it been jackknifing ?
  • had we been jackknifing ?
  • had you been jackknifing ?
  • had they been jackknifing ?

Future perfect continuous

  • will I have been jackknifing ?
  • will you have been jackknifing ?
  • will he/she/it have been jackknifing ?
  • will we have been jackknifing ?
  • will you have been jackknifing ?
  • will they have been jackknifing ?
See also verbs with similar meaning:

Definitions:

  • -  Dive into the water bending the body at the waist at a right angle, like a jackknife

Examples:

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