must desulferise
Verbe régulier : desulferise - desulferised- desulferised

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must desulferise
you must desulferise
he must desulferise
we must desulferise
you must desulferise
they must desulferise 	I must be desulferising
you must be desulferising
he must be desulferising
we must be desulferising
you must be desulferising
they must be desulferising	I must have desulferised
you must have desulferised
he must have desulferised
we must have desulferised
you must have desulferised
they must have desulferised	I must have been desulferising
you must have been desulferising
he must have been desulferising
we must have been desulferising
you must have been desulferising
they must have been desulferising	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't desulferise
you mustn't desulferise
he mustn't desulferise
we mustn't desulferise
you mustn't desulferise
they mustn't desulferise 	I mustn't be desulferising
you mustn't be desulferising
he mustn't be desulferising
we mustn't be desulferising
you mustn't be desulferising
they mustn't be desulferising	I mustn't have desulferised
you mustn't have desulferised
he mustn't have desulferised
we mustn't have desulferised
you mustn't have desulferised
they mustn't have desulferised	I mustn't have been desulferising
you mustn't have been desulferising
he mustn't have been desulferising
we mustn't have been desulferising
you mustn't have been desulferising
they mustn't have been desulferising	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I desulferise?
must you desulferise?
must he desulferise?
must we desulferise?
must you desulferise?
must they desulferise? 	must I be desulferising?
must you be desulferising?
must he be desulferising?
must we be desulferising?
must you be desulferising?
must they be desulferising? 	must I have desulferised?
must you have desulferised?
must he have desulferised?
must we have desulferised?
must you have desulferised?
must they have desulferised? 	must I have been desulferising?
must you have been desulferising?
must he have been desulferising?
must we have been desulferising?
must you have been desulferising?
must they have been desulferising? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I desulferise?
mustn't you desulferise?
mustn't he desulferise?
mustn't we desulferise?
mustn't you desulferise?
mustn't they desulferise? 	mustn't I be desulferising?
mustn't you be desulferising?
mustn't he be desulferising?
mustn't we be desulferising?
mustn't you be desulferising?
mustn't they be desulferising? 	mustn't I have desulferised?
mustn't you have desulferised?
mustn't he have desulferised?
mustn't we have desulferised?
mustn't you have desulferised?
mustn't they have desulferised? 	mustn't I have been desulferising?
mustn't you have been desulferising?
mustn't he have been desulferising?
mustn't we have been desulferising?
mustn't you have been desulferising?
mustn't they have been desulferising?