will jackknife
Regular verb: jackknife - jackknifed- jackknifed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
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	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I won't jackknife
you won't jackknife
she won't jackknife
we won't jackknife
you won't jackknife
they won't jackknife 	I won't be jackknifing
you won't be jackknifing
she won't be jackknifing
we won't be jackknifing
you won't be jackknifing
they won't be jackknifing	I won't have jackknifed
you won't have jackknifed
she won't have jackknifed
we won't have jackknifed
you won't have jackknifed
they won't have jackknifed	I won't have been jackknifing
you won't have been jackknifing
she won't have been jackknifing
we won't have been jackknifing
you won't have been jackknifing
they won't have been jackknifing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
will I jackknife?
will you jackknife?
will she jackknife?
will we jackknife?
will you jackknife?
will they jackknife? 	will I be jackknifing?
will you be jackknifing?
will she be jackknifing?
will we be jackknifing?
will you be jackknifing?
will they be jackknifing? 	will I have jackknifed?
will you have jackknifed?
will she have jackknifed?
will we have jackknifed?
will you have jackknifed?
will they have jackknifed? 	will I have been jackknifing?
will you have been jackknifing?
will she have been jackknifing?
will we have been jackknifing?
will you have been jackknifing?
will they have been jackknifing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
won't I jackknife?
won't you jackknife?
won't she jackknife?
won't we jackknife?
won't you jackknife?
won't they jackknife? 	won't I be jackknifing?
won't you be jackknifing?
won't she be jackknifing?
won't we be jackknifing?
won't you be jackknifing?
won't they be jackknifing? 	won't I have jackknifed?
won't you have jackknifed?
won't she have jackknifed?
won't we have jackknifed?
won't you have jackknifed?
won't they have jackknifed? 	won't I have been jackknifing?
won't you have been jackknifing?
won't she have been jackknifing?
won't we have been jackknifing?
won't you have been jackknifing?
won't they have been jackknifing?