I can unfold you can unfold she can unfold we can unfold you can unfold they can unfold
V-ing form
I can be unfolding you can be unfolding she can be unfolding we can be unfolding you can be unfolding they can be unfolding
Perfect
I can have unfolded you can have unfolded she 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 she 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 she 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 she 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 she 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 she 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 she unfold? can we unfold? can you unfold? can they unfold?
V-ing form
can I be unfolding? can you be unfolding? can she be unfolding? can we be unfolding? can you be unfolding? can they be unfolding?
Perfect
can I have unfolded? can you have unfolded? can she 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 she 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 she 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 she 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 she 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 she have been unfolding? can't we have been unfolding? can't you have been unfolding? can't they have been unfolding?