I could encumber you could encumber he could encumber we could encumber you could encumber they could encumber
V-ing form
I could be encumbering you could be encumbering he could be encumbering we could be encumbering you could be encumbering they could be encumbering
Perfect
I could have encumbered you could have encumbered he could have encumbered we could have encumbered you could have encumbered they could have encumbered
V-ing perfect
I could have been encumbering you could have been encumbering he could have been encumbering we could have been encumbering you could have been encumbering they could have been encumbering
Negation
Simple form
I could not encumber you could not encumber he could not encumber we could not encumber you could not encumber they could not encumber
V-ing form
I could not be encumbering you could not be encumbering he could not be encumbering we could not be encumbering you could not be encumbering they could not be encumbering
Perfect
I could not have encumbered you could not have encumbered he could not have encumbered we could not have encumbered you could not have encumbered they could not have encumbered
V-ing perfect
I could not have been encumbering you could not have been encumbering he could not have been encumbering we could not have been encumbering you could not have been encumbering they could not have been encumbering
Interrogative form
Simple form
could I encumber? could you encumber? could he encumber? could we encumber? could you encumber? could they encumber?
V-ing form
could I be encumbering? could you be encumbering? could he be encumbering? could we be encumbering? could you be encumbering? could they be encumbering?
Perfect
could I have encumbered? could you have encumbered? could he have encumbered? could we have encumbered? could you have encumbered? could they have encumbered?
V-ing perfect
could I have been encumbering? could you have been encumbering? could he have been encumbering? could we have been encumbering? could you have been encumbering? could they have been encumbering?
Interro-negative form
Simple form
could I not encumber? could you not encumber? could he not encumber? could we not encumber? could you not encumber? could they not encumber?
V-ing form
could I not be encumbering? could you not be encumbering? could he not be encumbering? could we not be encumbering? could you not be encumbering? could they not be encumbering?
Perfect
could I not have encumbered? could you not have encumbered? could he not have encumbered? could we not have encumbered? could you not have encumbered? could they not have encumbered?
V-ing perfect
could I not have been encumbering? could you not have been encumbering? could he not have been encumbering? could we not have been encumbering? could you not have been encumbering? could they not have been encumbering?