must jackknife
Verbe régulier : jackknife - jackknifed- jackknifed
Traduction française : se mettre en portefeuille 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must jackknife
you must jackknife
he must jackknife
we must jackknife
you must jackknife
they must jackknife 	I must be jackknifing
you must be jackknifing
he must be jackknifing
we must be jackknifing
you must be jackknifing
they must be jackknifing	I must have jackknifed
you must have jackknifed
he must have jackknifed
we must have jackknifed
you must have jackknifed
they must have jackknifed	I must have been jackknifing
you must have been jackknifing
he must have been jackknifing
we must have been jackknifing
you must have been jackknifing
they must have been jackknifing	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not jackknife
you must not jackknife
he must not jackknife
we must not jackknife
you must not jackknife
they must not jackknife 	I must not be jackknifing
you must not be jackknifing
he must not be jackknifing
we must not be jackknifing
you must not be jackknifing
they must not be jackknifing	I must not have jackknifed
you must not have jackknifed
he must not have jackknifed
we must not have jackknifed
you must not have jackknifed
they must not have jackknifed	I must not have been jackknifing
you must not have been jackknifing
he must not have been jackknifing
we must not have been jackknifing
you must not have been jackknifing
they must not have been jackknifing	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I jackknife?
must you jackknife?
must he jackknife?
must we jackknife?
must you jackknife?
must they jackknife? 	must I be jackknifing?
must you be jackknifing?
must he be jackknifing?
must we be jackknifing?
must you be jackknifing?
must they be jackknifing? 	must I have jackknifed?
must you have jackknifed?
must he have jackknifed?
must we have jackknifed?
must you have jackknifed?
must they have jackknifed? 	must I have been jackknifing?
must you have been jackknifing?
must he have been jackknifing?
must we have been jackknifing?
must you have been jackknifing?
must they have been jackknifing? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not jackknife?
must you not jackknife?
must he not jackknife?
must we not jackknife?
must you not jackknife?
must they not jackknife? 	must I not be jackknifing?
must you not be jackknifing?
must he not be jackknifing?
must we not be jackknifing?
must you not be jackknifing?
must they not be jackknifing? 	must I not have jackknifed?
must you not have jackknifed?
must he not have jackknifed?
must we not have jackknifed?
must you not have jackknifed?
must they not have jackknifed? 	must I not have been jackknifing?
must you not have been jackknifing?
must he not have been jackknifing?
must we not have been jackknifing?
must you not have been jackknifing?
must they not have been jackknifing?