I can unstick you can unstick he can unstick we can unstick you can unstick they can unstick
V-ing form
I can be unsticking you can be unsticking he can be unsticking we can be unsticking you can be unsticking they can be unsticking
Perfect
I can have unsticked you can have unsticked he can have unsticked we can have unsticked you can have unsticked they can have unsticked
V-ing perfect
I can have been unsticking you can have been unsticking he can have been unsticking we can have been unsticking you can have been unsticking they can have been unsticking
Negation
Simple form
I cannot unstick you cannot unstick he cannot unstick we cannot unstick you cannot unstick they cannot unstick
V-ing form
I cannot be unsticking you cannot be unsticking he cannot be unsticking we cannot be unsticking you cannot be unsticking they cannot be unsticking
Perfect
I cannot have unsticked you cannot have unsticked he cannot have unsticked we cannot have unsticked you cannot have unsticked they cannot have unsticked
V-ing perfect
I cannot have been unsticking you cannot have been unsticking he cannot have been unsticking we cannot have been unsticking you cannot have been unsticking they cannot have been unsticking
Interrogative form
Simple form
can I unstick? can you unstick? can he unstick? can we unstick? can you unstick? can they unstick?
V-ing form
can I be unsticking? can you be unsticking? can he be unsticking? can we be unsticking? can you be unsticking? can they be unsticking?
Perfect
can I have unsticked? can you have unsticked? can he have unsticked? can we have unsticked? can you have unsticked? can they have unsticked?
V-ing perfect
can I have been unsticking? can you have been unsticking? can he have been unsticking? can we have been unsticking? can you have been unsticking? can they have been unsticking?
Interro-negative form
Simple form
can I not unstick? can you not unstick? can he not unstick? can we not unstick? can you not unstick? can they not unstick?
V-ing form
can I not be unsticking? can you not be unsticking? can he not be unsticking? can we not be unsticking? can you not be unsticking? can they not be unsticking?
Perfect
can I not have unsticked? can you not have unsticked? can he not have unsticked? can we not have unsticked? can you not have unsticked? can they not have unsticked?
V-ing perfect
can I not have been unsticking? can you not have been unsticking? can he not have been unsticking? can we not have been unsticking? can you not have been unsticking? can they not have been unsticking?