I could photocopy you could photocopy he could photocopy we could photocopy you could photocopy they could photocopy
V-ing form
I could be photocopying you could be photocopying he could be photocopying we could be photocopying you could be photocopying they could be photocopying
Perfect
I could have photocopied you could have photocopied he could have photocopied we could have photocopied you could have photocopied they could have photocopied
V-ing perfect
I could have been photocopying you could have been photocopying he could have been photocopying we could have been photocopying you could have been photocopying they could have been photocopying
Negation
Simple form
I could not photocopy you could not photocopy he could not photocopy we could not photocopy you could not photocopy they could not photocopy
V-ing form
I could not be photocopying you could not be photocopying he could not be photocopying we could not be photocopying you could not be photocopying they could not be photocopying
Perfect
I could not have photocopied you could not have photocopied he could not have photocopied we could not have photocopied you could not have photocopied they could not have photocopied
V-ing perfect
I could not have been photocopying you could not have been photocopying he could not have been photocopying we could not have been photocopying you could not have been photocopying they could not have been photocopying
Interrogative form
Simple form
could I photocopy? could you photocopy? could he photocopy? could we photocopy? could you photocopy? could they photocopy?
V-ing form
could I be photocopying? could you be photocopying? could he be photocopying? could we be photocopying? could you be photocopying? could they be photocopying?
Perfect
could I have photocopied? could you have photocopied? could he have photocopied? could we have photocopied? could you have photocopied? could they have photocopied?
V-ing perfect
could I have been photocopying? could you have been photocopying? could he have been photocopying? could we have been photocopying? could you have been photocopying? could they have been photocopying?
Interro-negative form
Simple form
could I not photocopy? could you not photocopy? could he not photocopy? could we not photocopy? could you not photocopy? could they not photocopy?
V-ing form
could I not be photocopying? could you not be photocopying? could he not be photocopying? could we not be photocopying? could you not be photocopying? could they not be photocopying?
Perfect
could I not have photocopied? could you not have photocopied? could he not have photocopied? could we not have photocopied? could you not have photocopied? could they not have photocopied?
V-ing perfect
could I not have been photocopying? could you not have been photocopying? could he not have been photocopying? could we not have been photocopying? could you not have been photocopying? could they not have been photocopying?