should jackknife
Verbo regular: jackknife - jackknifed- jackknifed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should jackknife
you should jackknife
he should jackknife
we should jackknife
you should jackknife
they should jackknife 	I should be jackknifing
you should be jackknifing
he should be jackknifing
we should be jackknifing
you should be jackknifing
they should be jackknifing	I should have jackknifed
you should have jackknifed
he should have jackknifed
we should have jackknifed
you should have jackknifed
they should have jackknifed	I should have been jackknifing
you should have been jackknifing
he should have been jackknifing
we should have been jackknifing
you should have been jackknifing
they should have been jackknifing	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I should not jackknife
you should not jackknife
he should not jackknife
we should not jackknife
you should not jackknife
they should not jackknife 	I should not be jackknifing
you should not be jackknifing
he should not be jackknifing
we should not be jackknifing
you should not be jackknifing
they should not be jackknifing	I should not have jackknifed
you should not have jackknifed
he should not have jackknifed
we should not have jackknifed
you should not have jackknifed
they should not have jackknifed	I should not have been jackknifing
you should not have been jackknifing
he should not have been jackknifing
we should not have been jackknifing
you should not have been jackknifing
they should not have been jackknifing	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I jackknife?
should you jackknife?
should he jackknife?
should we jackknife?
should you jackknife?
should they jackknife? 	should I be jackknifing?
should you be jackknifing?
should he be jackknifing?
should we be jackknifing?
should you be jackknifing?
should they be jackknifing? 	should I have jackknifed?
should you have jackknifed?
should he have jackknifed?
should we have jackknifed?
should you have jackknifed?
should they have jackknifed? 	should I have been jackknifing?
should you have been jackknifing?
should he have been jackknifing?
should we have been jackknifing?
should you have been jackknifing?
should they have been jackknifing? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
should I not jackknife?
should you not jackknife?
should he not jackknife?
should we not jackknife?
should you not jackknife?
should they not jackknife? 	should I not be jackknifing?
should you not be jackknifing?
should he not be jackknifing?
should we not be jackknifing?
should you not be jackknifing?
should they not be jackknifing? 	should I not have jackknifed?
should you not have jackknifed?
should he not have jackknifed?
should we not have jackknifed?
should you not have jackknifed?
should they not have jackknifed? 	should I not have been jackknifing?
should you not have been jackknifing?
should he not have been jackknifing?
should we not have been jackknifing?
should you not have been jackknifing?
should they not have been jackknifing?