must unravel
Regular verb: unravel - unravelled- unravelled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unravel
you must unravel
she must unravel
we must unravel
you must unravel
they must unravel 	I must be unravelling
you must be unravelling
she must be unravelling
we must be unravelling
you must be unravelling
they must be unravelling	I must have unravelled
you must have unravelled
she must have unravelled
we must have unravelled
you must have unravelled
they must have unravelled	I must have been unravelling
you must have been unravelling
she must have been unravelling
we must have been unravelling
you must have been unravelling
they must have been unravelling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unravel
you mustn't unravel
she mustn't unravel
we mustn't unravel
you mustn't unravel
they mustn't unravel 	I mustn't be unravelling
you mustn't be unravelling
she mustn't be unravelling
we mustn't be unravelling
you mustn't be unravelling
they mustn't be unravelling	I mustn't have unravelled
you mustn't have unravelled
she mustn't have unravelled
we mustn't have unravelled
you mustn't have unravelled
they mustn't have unravelled	I mustn't have been unravelling
you mustn't have been unravelling
she mustn't have been unravelling
we mustn't have been unravelling
you mustn't have been unravelling
they mustn't have been unravelling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unravel?
must you unravel?
must she unravel?
must we unravel?
must you unravel?
must they unravel? 	must I be unravelling?
must you be unravelling?
must she be unravelling?
must we be unravelling?
must you be unravelling?
must they be unravelling? 	must I have unravelled?
must you have unravelled?
must she have unravelled?
must we have unravelled?
must you have unravelled?
must they have unravelled? 	must I have been unravelling?
must you have been unravelling?
must she have been unravelling?
must we have been unravelling?
must you have been unravelling?
must they have been unravelling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unravel?
mustn't you unravel?
mustn't she unravel?
mustn't we unravel?
mustn't you unravel?
mustn't they unravel? 	mustn't I be unravelling?
mustn't you be unravelling?
mustn't she be unravelling?
mustn't we be unravelling?
mustn't you be unravelling?
mustn't they be unravelling? 	mustn't I have unravelled?
mustn't you have unravelled?
mustn't she have unravelled?
mustn't we have unravelled?
mustn't you have unravelled?
mustn't they have unravelled? 	mustn't I have been unravelling?
mustn't you have been unravelling?
mustn't she have been unravelling?
mustn't we have been unravelling?
mustn't you have been unravelling?
mustn't they have been unravelling?