must unbuckle
Verbe régulier : unbuckle - unbuckled- unbuckled
Traduction française : déboucler - défaire la boucle de 

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must unbuckle
you must unbuckle
she must unbuckle
we must unbuckle
you must unbuckle
they must unbuckle 	I must be unbuckling
you must be unbuckling
she must be unbuckling
we must be unbuckling
you must be unbuckling
they must be unbuckling	I must have unbuckled
you must have unbuckled
she must have unbuckled
we must have unbuckled
you must have unbuckled
they must have unbuckled	I must have been unbuckling
you must have been unbuckling
she must have been unbuckling
we must have been unbuckling
you must have been unbuckling
they must have been unbuckling	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must not unbuckle
you must not unbuckle
she must not unbuckle
we must not unbuckle
you must not unbuckle
they must not unbuckle 	I must not be unbuckling
you must not be unbuckling
she must not be unbuckling
we must not be unbuckling
you must not be unbuckling
they must not be unbuckling	I must not have unbuckled
you must not have unbuckled
she must not have unbuckled
we must not have unbuckled
you must not have unbuckled
they must not have unbuckled	I must not have been unbuckling
you must not have been unbuckling
she must not have been unbuckling
we must not have been unbuckling
you must not have been unbuckling
they must not have been unbuckling	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I unbuckle?
must you unbuckle?
must she unbuckle?
must we unbuckle?
must you unbuckle?
must they unbuckle? 	must I be unbuckling?
must you be unbuckling?
must she be unbuckling?
must we be unbuckling?
must you be unbuckling?
must they be unbuckling? 	must I have unbuckled?
must you have unbuckled?
must she have unbuckled?
must we have unbuckled?
must you have unbuckled?
must they have unbuckled? 	must I have been unbuckling?
must you have been unbuckling?
must she have been unbuckling?
must we have been unbuckling?
must you have been unbuckling?
must they have been unbuckling? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I not unbuckle?
must you not unbuckle?
must she not unbuckle?
must we not unbuckle?
must you not unbuckle?
must they not unbuckle? 	must I not be unbuckling?
must you not be unbuckling?
must she not be unbuckling?
must we not be unbuckling?
must you not be unbuckling?
must they not be unbuckling? 	must I not have unbuckled?
must you not have unbuckled?
must she not have unbuckled?
must we not have unbuckled?
must you not have unbuckled?
must they not have unbuckled? 	must I not have been unbuckling?
must you not have been unbuckling?
must she not have been unbuckling?
must we not have been unbuckling?
must you not have been unbuckling?
must they not have been unbuckling?