jack-knife – English verb conjugation

English verb forms of jack-knife

Nominal Forms

Infinitive: to jack-knife
Participle: jack-knifed
Gerund: jack-knifing

Cognates

-

Indicative

Present

Ijack-knife
youjack-knife
he;she;itjack-knifes
wejack-knife
youjack-knife
theyjack-knife

Perfect

Ihave jack-knifed
youhave jack-knifed
he;she;ithas jack-knifed
wehave jack-knifed
youhave jack-knifed
theyhave jack-knifed

Past

Ijack-knifed
youjack-knifed
he;she;itjack-knifed
wejack-knifed
youjack-knifed
theyjack-knifed

Pluperfect

Ihad jack-knifed
youhad jack-knifed
he;she;ithad jack-knifed
wehad jack-knifed
youhad jack-knifed
theyhad jack-knifed

Future

Iwill jack-knife
youwill jack-knife
he;she;itwill jack-knife
wewill jack-knife
youwill jack-knife
theywill jack-knife

Future Perfect

Iwill have jack-knifed
youwill have jack-knifed
he;she;itwill have jack-knifed
wewill have jack-knifed
youwill have jack-knifed
theywill have jack-knifed

Subjunctive

Present

Ijack-knife
youjack-knife
he;she;itjack-knife
wejack-knife
youjack-knife
theyjack-knife

Perfect

Ihave jack-knifed
youhave jack-knifed
he;she;ithave jack-knifed
wehave jack-knifed
youhave jack-knifed
theyhave jack-knifed

Imperfect

Ijack-knifed
youjack-knifed
he;she;itjack-knifed
wejack-knifed
youjack-knifed
theyjack-knifed

Pluperfect

Ihad jack-knifed
youhad jack-knifed
he;she;ithad jack-knifed
wehad jack-knifed
youhad jack-knifed
theyhad jack-knifed

Conditional

Present

Iwould jack-knife
youwould jack-knife
he;she;itwould jack-knife
wewould jack-knife
youwould jack-knife
theywould jack-knife

Perfect

Iwould have jack-knifed
youwould have jack-knifed
he;she;itwould have jack-knifed
wewould have jack-knifed
youwould have jack-knifed
theywould have jack-knifed

Imperative

youjack-knife
weLet's jack-knife
youjack-knife

Progressive (Continuous) Forms

Indicative

Present

Iam jack-knifing
youare jack-knifing
he;she;itis jack-knifing
weare jack-knifing
youare jack-knifing
theyare jack-knifing

Perfect

Ihave been jack-knifing
youhave been jack-knifing
he;she;ithas been jack-knifing
wehave been jack-knifing
youhave been jack-knifing
theyhave been jack-knifing

Past

Iwas jack-knifing
youwere jack-knifing
he;she;itwas jack-knifing
wewere jack-knifing
youwere jack-knifing
theywere jack-knifing

Pluperfect

Ihad been jack-knifing
youhad been jack-knifing
he;she;ithad been jack-knifing
wehad been jack-knifing
youhad been jack-knifing
theyhad been jack-knifing

Future

Iwill be jack-knifing
youwill be jack-knifing
he;she;itwill be jack-knifing
wewill be jack-knifing
youwill be jack-knifing
theywill be jack-knifing

Future Perfect

Iwill have been jack-knifing
youwill have been jack-knifing
he;she;itwill have been jack-knifing
wewill have been jack-knifing
youwill have been jack-knifing
theywill have been jack-knifing

Conditional

Present

Iwould be jack-knifing
youwould be jack-knifing
he;she;itwould be jack-knifing
wewould be jack-knifing
youwould be jack-knifing
theywould be jack-knifing

Perfect

Iwould have been jack-knifing
youwould have been jack-knifing
he;she;itwould have been jack-knifing
wewould have been jack-knifing
youwould have been jack-knifing
theywould have been jack-knifing

Other

Synonyms & Antonyms

Additional Information

Phrasal Verbs

Etymology

Sample Sentences

  • The cat jackknifed in the air and landed gracefully on its feet.
  • There was a world inside that tall grass. You could plop yourself down in the middle of it with the scraggly stems against the back of your neck and the endless grasses rising up and jackknifing against the bigbluesky, and the ranch and all of its players would fade into a distant dream. [2009, Reif Larsen, The Selected Works of T.S. Spivet, Pinguin Books, page 37:]
  • Ten of the freight train's wagons had derailed, two of them foul of the Down Fast. At 2308, the TPO struck one of them, causing the locomotive (86239) to jack-knife and turn so that it was almost touching the end wall of a house in The Russetts, a new-build row that sat close to the line. [2026 March 18, Greg Morse, “1996 crash driving freight reforms”, in RAIL, number 1057, page 50:]
  • Before I knew what was happening, I'd jack-knifed the truck.
  • Before I knew what was happening, I'd jack-knifed.