must decussate
Verbe régulier : decussate - decussated- decussated

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must decussate
you must decussate
he must decussate
we must decussate
you must decussate
they must decussate 	I must be decussating
you must be decussating
he must be decussating
we must be decussating
you must be decussating
they must be decussating	I must have decussated
you must have decussated
he must have decussated
we must have decussated
you must have decussated
they must have decussated	I must have been decussating
you must have been decussating
he must have been decussating
we must have been decussating
you must have been decussating
they must have been decussating	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't decussate
you mustn't decussate
he mustn't decussate
we mustn't decussate
you mustn't decussate
they mustn't decussate 	I mustn't be decussating
you mustn't be decussating
he mustn't be decussating
we mustn't be decussating
you mustn't be decussating
they mustn't be decussating	I mustn't have decussated
you mustn't have decussated
he mustn't have decussated
we mustn't have decussated
you mustn't have decussated
they mustn't have decussated	I mustn't have been decussating
you mustn't have been decussating
he mustn't have been decussating
we mustn't have been decussating
you mustn't have been decussating
they mustn't have been decussating	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I decussate?
must you decussate?
must he decussate?
must we decussate?
must you decussate?
must they decussate? 	must I be decussating?
must you be decussating?
must he be decussating?
must we be decussating?
must you be decussating?
must they be decussating? 	must I have decussated?
must you have decussated?
must he have decussated?
must we have decussated?
must you have decussated?
must they have decussated? 	must I have been decussating?
must you have been decussating?
must he have been decussating?
must we have been decussating?
must you have been decussating?
must they have been decussating? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I decussate?
mustn't you decussate?
mustn't he decussate?
mustn't we decussate?
mustn't you decussate?
mustn't they decussate? 	mustn't I be decussating?
mustn't you be decussating?
mustn't he be decussating?
mustn't we be decussating?
mustn't you be decussating?
mustn't they be decussating? 	mustn't I have decussated?
mustn't you have decussated?
mustn't he have decussated?
mustn't we have decussated?
mustn't you have decussated?
mustn't they have decussated? 	mustn't I have been decussating?
mustn't you have been decussating?
mustn't he have been decussating?
mustn't we have been decussating?
mustn't you have been decussating?
mustn't they have been decussating?