must unthread
Verbe régulier : unthread - unthreaded- unthreaded

Affirmation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I must unthread
you must unthread
he must unthread
we must unthread
you must unthread
they must unthread 	I must be unthreading
you must be unthreading
he must be unthreading
we must be unthreading
you must be unthreading
they must be unthreading	I must have unthreaded
you must have unthreaded
he must have unthreaded
we must have unthreaded
you must have unthreaded
they must have unthreaded	I must have been unthreading
you must have been unthreading
he must have been unthreading
we must have been unthreading
you must have been unthreading
they must have been unthreading	

Négation 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
I mustn't unthread
you mustn't unthread
he mustn't unthread
we mustn't unthread
you mustn't unthread
they mustn't unthread 	I mustn't be unthreading
you mustn't be unthreading
he mustn't be unthreading
we mustn't be unthreading
you mustn't be unthreading
they mustn't be unthreading	I mustn't have unthreaded
you mustn't have unthreaded
he mustn't have unthreaded
we mustn't have unthreaded
you mustn't have unthreaded
they mustn't have unthreaded	I mustn't have been unthreading
you mustn't have been unthreading
he mustn't have been unthreading
we mustn't have been unthreading
you mustn't have been unthreading
they mustn't have been unthreading	

Forme interrogative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
must I unthread?
must you unthread?
must he unthread?
must we unthread?
must you unthread?
must they unthread? 	must I be unthreading?
must you be unthreading?
must he be unthreading?
must we be unthreading?
must you be unthreading?
must they be unthreading? 	must I have unthreaded?
must you have unthreaded?
must he have unthreaded?
must we have unthreaded?
must you have unthreaded?
must they have unthreaded? 	must I have been unthreading?
must you have been unthreading?
must he have been unthreading?
must we have been unthreading?
must you have been unthreading?
must they have been unthreading? 	

Forme interro-négative 	
Forme simple 	Forme en V-ing 	Perfect 	Perfect en V-ing 	
mustn't I unthread?
mustn't you unthread?
mustn't he unthread?
mustn't we unthread?
mustn't you unthread?
mustn't they unthread? 	mustn't I be unthreading?
mustn't you be unthreading?
mustn't he be unthreading?
mustn't we be unthreading?
mustn't you be unthreading?
mustn't they be unthreading? 	mustn't I have unthreaded?
mustn't you have unthreaded?
mustn't he have unthreaded?
mustn't we have unthreaded?
mustn't you have unthreaded?
mustn't they have unthreaded? 	mustn't I have been unthreading?
mustn't you have been unthreading?
mustn't he have been unthreading?
mustn't we have been unthreading?
mustn't you have been unthreading?
mustn't they have been unthreading?