shall jackknife
Regular verb: jackknife - jackknifed- jackknifed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall jackknife
you shall jackknife
he shall jackknife
we shall jackknife
you shall jackknife
they shall jackknife 	I shall be jackknifing
you shall be jackknifing
he shall be jackknifing
we shall be jackknifing
you shall be jackknifing
they shall be jackknifing	I shall have jackknifed
you shall have jackknifed
he shall have jackknifed
we shall have jackknifed
you shall have jackknifed
they shall have jackknifed	I shall have been jackknifing
you shall have been jackknifing
he shall have been jackknifing
we shall have been jackknifing
you shall have been jackknifing
they shall have been jackknifing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I shall not jackknife
you shall not jackknife
he shall not jackknife
we shall not jackknife
you shall not jackknife
they shall not jackknife 	I shall not be jackknifing
you shall not be jackknifing
he shall not be jackknifing
we shall not be jackknifing
you shall not be jackknifing
they shall not be jackknifing	I shall not have jackknifed
you shall not have jackknifed
he shall not have jackknifed
we shall not have jackknifed
you shall not have jackknifed
they shall not have jackknifed	I shall not have been jackknifing
you shall not have been jackknifing
he shall not have been jackknifing
we shall not have been jackknifing
you shall not have been jackknifing
they shall not have been jackknifing	

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

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
shall I not jackknife?
shall you not jackknife?
shall he not jackknife?
shall we not jackknife?
shall you not jackknife?
shall they not jackknife? 	shall I not be jackknifing?
shall you not be jackknifing?
shall he not be jackknifing?
shall we not be jackknifing?
shall you not be jackknifing?
shall they not be jackknifing? 	shall I not have jackknifed?
shall you not have jackknifed?
shall he not have jackknifed?
shall we not have jackknifed?
shall you not have jackknifed?
shall they not have jackknifed? 	shall I not have been jackknifing?
shall you not have been jackknifing?
shall he not have been jackknifing?
shall we not have been jackknifing?
shall you not have been jackknifing?
shall they not have been jackknifing?