I can unfold you can unfold he can unfold we can unfold you can unfold they can unfold
V-ing form
I can be unfolding you can be unfolding he can be unfolding we can be unfolding you can be unfolding they can be unfolding
Perfect
I can have unfolded you can have unfolded he can have unfolded we can have unfolded you can have unfolded they can have unfolded
V-ing perfect
I can have been unfolding you can have been unfolding he can have been unfolding we can have been unfolding you can have been unfolding they can have been unfolding
Negation
Simple form
I can't unfold you can't unfold he can't unfold we can't unfold you can't unfold they can't unfold
V-ing form
I can't be unfolding you can't be unfolding he can't be unfolding we can't be unfolding you can't be unfolding they can't be unfolding
Perfect
I can't have unfolded you can't have unfolded he can't have unfolded we can't have unfolded you can't have unfolded they can't have unfolded
V-ing perfect
I can't have been unfolding you can't have been unfolding he can't have been unfolding we can't have been unfolding you can't have been unfolding they can't have been unfolding
Interrogative form
Simple form
can I unfold? can you unfold? can he unfold? can we unfold? can you unfold? can they unfold?
V-ing form
can I be unfolding? can you be unfolding? can he be unfolding? can we be unfolding? can you be unfolding? can they be unfolding?
Perfect
can I have unfolded? can you have unfolded? can he have unfolded? can we have unfolded? can you have unfolded? can they have unfolded?
V-ing perfect
can I have been unfolding? can you have been unfolding? can he have been unfolding? can we have been unfolding? can you have been unfolding? can they have been unfolding?
Interro-negative form
Simple form
can't I unfold? can't you unfold? can't he unfold? can't we unfold? can't you unfold? can't they unfold?
V-ing form
can't I be unfolding? can't you be unfolding? can't he be unfolding? can't we be unfolding? can't you be unfolding? can't they be unfolding?
Perfect
can't I have unfolded? can't you have unfolded? can't he have unfolded? can't we have unfolded? can't you have unfolded? can't they have unfolded?
V-ing perfect
can't I have been unfolding? can't you have been unfolding? can't he have been unfolding? can't we have been unfolding? can't you have been unfolding? can't they have been unfolding?