must unfold
Regular verb: unfold - unfolded- unfolded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I must unfold
you must unfold
she must unfold
we must unfold
you must unfold
they must unfold 	I must be unfolding
you must be unfolding
she must be unfolding
we must be unfolding
you must be unfolding
they must be unfolding	I must have unfolded
you must have unfolded
she must have unfolded
we must have unfolded
you must have unfolded
they must have unfolded	I must have been unfolding
you must have been unfolding
she must have been unfolding
we must have been unfolding
you must have been unfolding
they must have been unfolding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I mustn't unfold
you mustn't unfold
she mustn't unfold
we mustn't unfold
you mustn't unfold
they mustn't unfold 	I mustn't be unfolding
you mustn't be unfolding
she mustn't be unfolding
we mustn't be unfolding
you mustn't be unfolding
they mustn't be unfolding	I mustn't have unfolded
you mustn't have unfolded
she mustn't have unfolded
we mustn't have unfolded
you mustn't have unfolded
they mustn't have unfolded	I mustn't have been unfolding
you mustn't have been unfolding
she mustn't have been unfolding
we mustn't have been unfolding
you mustn't have been unfolding
they mustn't have been unfolding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
must I unfold?
must you unfold?
must she unfold?
must we unfold?
must you unfold?
must they unfold? 	must I be unfolding?
must you be unfolding?
must she be unfolding?
must we be unfolding?
must you be unfolding?
must they be unfolding? 	must I have unfolded?
must you have unfolded?
must she have unfolded?
must we have unfolded?
must you have unfolded?
must they have unfolded? 	must I have been unfolding?
must you have been unfolding?
must she have been unfolding?
must we have been unfolding?
must you have been unfolding?
must they have been unfolding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
mustn't I unfold?
mustn't you unfold?
mustn't she unfold?
mustn't we unfold?
mustn't you unfold?
mustn't they unfold? 	mustn't I be unfolding?
mustn't you be unfolding?
mustn't she be unfolding?
mustn't we be unfolding?
mustn't you be unfolding?
mustn't they be unfolding? 	mustn't I have unfolded?
mustn't you have unfolded?
mustn't she have unfolded?
mustn't we have unfolded?
mustn't you have unfolded?
mustn't they have unfolded? 	mustn't I have been unfolding?
mustn't you have been unfolding?
mustn't she have been unfolding?
mustn't we have been unfolding?
mustn't you have been unfolding?
mustn't they have been unfolding?