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