to jackknife
Regular verb: jackknife - jackknifed- jackknifed

Indicative 	
Present 	Present continuous 	Preterite 	Preterite continuous 	
I jackknife
you jackknife
she jackknifes
we jackknife
you jackknife
they jackknife 	I'mjackknifing
you'rejackknifing
she'sjackknifing
we'rejackknifing
you'rejackknifing
they'rejackknifing	I jackknifed
you jackknifed
she jackknifed
we jackknifed
you jackknifed
they jackknifed	Iwasjackknifing
youwerejackknifing
shewasjackknifing
wewerejackknifing
youwerejackknifing
theywerejackknifing	
Present perfect 	Present perfect continuous 	Pluperfect 	Pluperfect continuous 	
I've jackknifed
you've jackknifed
she's jackknifed
we've jackknifed
you've jackknifed
they've jackknifed	I'vebeen jackknifing
you'vebeen jackknifing
she'sbeen jackknifing
we'vebeen jackknifing
you'vebeen jackknifing
they'vebeen jackknifing	I'd jackknifed
you'd jackknifed
she'd jackknifed
we'd jackknifed
you'd jackknifed
they'd jackknifed	I'd been jackknifing
you'd been jackknifing
she'd been jackknifing
we'd been jackknifing
you'd been jackknifing
they'd been jackknifing	
Future 	Future continuous 	Future perfect 	Future perfect continuous 	
I'll jackknife
you'll jackknife
she'll jackknife
we'll jackknife
you'll jackknife
they'll jackknife 	I'll be jackknifing
you'll be jackknifing
she'll be jackknifing
we'll be jackknifing
you'll be jackknifing
they'll be jackknifing	I'll have jackknifed
you'll have jackknifed
she'll have jackknifed
we'll have jackknifed
you'll have jackknifed
they'll have jackknifed	I'll have been jackknifing
you'll have been jackknifing
she'll have been jackknifing
we'll have been jackknifing
you'll have been jackknifing
they'll have been jackknifing	

Conditional 	
Present 	Present continuous 	Past 	Past continuous 	
I'd jackknife
you'd jackknife
she'd jackknife
we'd jackknife
you'd jackknife
they'd jackknife 	I'd be jackknifing
you'd be jackknifing
she'd be jackknifing
we'd be jackknifing
you'd be jackknifing
they'd be jackknifing	I'd have jackknifed
you'd have jackknifed
she'd have jackknifed
we'd have jackknifed
you'd have jackknifed
they'd have jackknifed	I'd have been jackknifing
you'd have been jackknifing
she'd have been jackknifing
we'd have been jackknifing
you'd have been jackknifing
they'd have been jackknifing	

Infinitive 	
Imperative 	
Infinitive 	 	Imperative 	 	
to jackknife 	 	jackknife
Let's jackknife
jackknife 	 	

Participle 	
Present 	Past 	 	 	
jackknifing	jackknifed