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 cannot unfold you cannot unfold she cannot unfold we cannot unfold you cannot unfold they cannot unfold
V-ing form
I cannot be unfolding you cannot be unfolding she cannot be unfolding we cannot be unfolding you cannot be unfolding they cannot be unfolding
Perfect
I cannot have unfolded you cannot have unfolded she cannot have unfolded we cannot have unfolded you cannot have unfolded they cannot have unfolded
V-ing perfect
I cannot have been unfolding you cannot have been unfolding she cannot have been unfolding we cannot have been unfolding you cannot have been unfolding they cannot 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 I not unfold? can you not unfold? can she not unfold? can we not unfold? can you not unfold? can they not unfold?
V-ing form
can I not be unfolding? can you not be unfolding? can she not be unfolding? can we not be unfolding? can you not be unfolding? can they not be unfolding?
Perfect
can I not have unfolded? can you not have unfolded? can she not have unfolded? can we not have unfolded? can you not have unfolded? can they not have unfolded?
V-ing perfect
can I not have been unfolding? can you not have been unfolding? can she not have been unfolding? can we not have been unfolding? can you not have been unfolding? can they not have been unfolding?