must shack
Verbe régulier : shack - shacked- shacked

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must shack
you must shack
she must shack
we must shack
you must shack
they must shack 	I must be shacking
you must be shacking
she must be shacking
we must be shacking
you must be shacking
they must be shacking	I must have shacked
you must have shacked
she must have shacked
we must have shacked
you must have shacked
they must have shacked	I must have been shacking
you must have been shacking
she must have been shacking
we must have been shacking
you must have been shacking
they must have been shacking	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't shack
you mustn't shack
she mustn't shack
we mustn't shack
you mustn't shack
they mustn't shack 	I mustn't be shacking
you mustn't be shacking
she mustn't be shacking
we mustn't be shacking
you mustn't be shacking
they mustn't be shacking	I mustn't have shacked
you mustn't have shacked
she mustn't have shacked
we mustn't have shacked
you mustn't have shacked
they mustn't have shacked	I mustn't have been shacking
you mustn't have been shacking
she mustn't have been shacking
we mustn't have been shacking
you mustn't have been shacking
they mustn't have been shacking	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I shack?
must you shack?
must she shack?
must we shack?
must you shack?
must they shack? 	must I be shacking?
must you be shacking?
must she be shacking?
must we be shacking?
must you be shacking?
must they be shacking? 	must I have shacked?
must you have shacked?
must she have shacked?
must we have shacked?
must you have shacked?
must they have shacked? 	must I have been shacking?
must you have been shacking?
must she have been shacking?
must we have been shacking?
must you have been shacking?
must they have been shacking? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I shack?
mustn't you shack?
mustn't she shack?
mustn't we shack?
mustn't you shack?
mustn't they shack? 	mustn't I be shacking?
mustn't you be shacking?
mustn't she be shacking?
mustn't we be shacking?
mustn't you be shacking?
mustn't they be shacking? 	mustn't I have shacked?
mustn't you have shacked?
mustn't she have shacked?
mustn't we have shacked?
mustn't you have shacked?
mustn't they have shacked? 	mustn't I have been shacking?
mustn't you have been shacking?
mustn't she have been shacking?
mustn't we have been shacking?
mustn't you have been shacking?
mustn't they have been shacking?