I could occupy you could occupy he could occupy we could occupy you could occupy they could occupy
V-ing form
I could be occupying you could be occupying he could be occupying we could be occupying you could be occupying they could be occupying
Perfect
I could have occupied you could have occupied he could have occupied we could have occupied you could have occupied they could have occupied
V-ing perfect
I could have been occupying you could have been occupying he could have been occupying we could have been occupying you could have been occupying they could have been occupying
Negation
Simple form
I could not occupy you could not occupy he could not occupy we could not occupy you could not occupy they could not occupy
V-ing form
I could not be occupying you could not be occupying he could not be occupying we could not be occupying you could not be occupying they could not be occupying
Perfect
I could not have occupied you could not have occupied he could not have occupied we could not have occupied you could not have occupied they could not have occupied
V-ing perfect
I could not have been occupying you could not have been occupying he could not have been occupying we could not have been occupying you could not have been occupying they could not have been occupying
Interrogative form
Simple form
could I occupy? could you occupy? could he occupy? could we occupy? could you occupy? could they occupy?
V-ing form
could I be occupying? could you be occupying? could he be occupying? could we be occupying? could you be occupying? could they be occupying?
Perfect
could I have occupied? could you have occupied? could he have occupied? could we have occupied? could you have occupied? could they have occupied?
V-ing perfect
could I have been occupying? could you have been occupying? could he have been occupying? could we have been occupying? could you have been occupying? could they have been occupying?
Interro-negative form
Simple form
could I not occupy? could you not occupy? could he not occupy? could we not occupy? could you not occupy? could they not occupy?
V-ing form
could I not be occupying? could you not be occupying? could he not be occupying? could we not be occupying? could you not be occupying? could they not be occupying?
Perfect
could I not have occupied? could you not have occupied? could he not have occupied? could we not have occupied? could you not have occupied? could they not have occupied?
V-ing perfect
could I not have been occupying? could you not have been occupying? could he not have been occupying? could we not have been occupying? could you not have been occupying? could they not have been occupying?