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Jack-knife Past Tense

jack-knifed
past tense of jack-knife is jack-knifed.

Jack-knife verb forms

InfinitivePresent ParticiplePast TensePast Participle
jack-knifejack-knifingjack-knifedjack-knifed

Conjugation of Jack-knife

Simple / Indefinite Present Tense
He/She/It jack-knifes .
I jack-knife.
You/We/They jack-knife.

Present Continuous Tense
He/She/It is jack-knifing.
I am jack-knifing.
You/We/They are jack-knifing.

Present Perfect Tense
He/She/It has jack-knifed.
I have jack-knifed.
You/We/They have jack-knifed.

Present Perfect Continuous Tense
He/She/It has been jack-knifing.
I have been jack-knifing.
You/We/They have been jack-knifing.

Simple Past Tense
He/She/It jack-knifed.
I jack-knifed.
You/We/They jack-knifed.

Past Continuous Tense
He/She/It was jack-knifing.
I was jack-knifing.
You/We/They were jack-knifing.

Past Perfect Tense
He/She/It had jack-knifed.
I had jack-knifed.
You/We/They had jack-knifed.

Past Perfect Continuous Tense
He/She/It had been jack-knifing.
I had been jack-knifing.
You/We/They had been jack-knifing.

Simple Future Tense
He/She/It will/shall jack-knife.
I will/shall jack-knife.
You/We/They will/shall jack-knife.

Future Continuous Tense
He/She/It will/shall be jack-knifing.
I will/shall be jack-knifing.
You/We/They will/shall be jack-knifing.

Future Perfect Tense
He/She/It will/shall have jack-knifed.
I will/shall have jack-knifed.
You/We/They will/shall have jack-knifed.

Future Perfect Continuous Tense
He/She/It will/shall have been jack-knifing.
I will/shall have been jack-knifing.
You/We/They will/shall have been jack-knifing.

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