I could consult you could consult she could consult we could consult you could consult they could consult
V-ing form
I could be consulting you could be consulting she could be consulting we could be consulting you could be consulting they could be consulting
Perfect
I could have consulted you could have consulted she could have consulted we could have consulted you could have consulted they could have consulted
V-ing perfect
I could have been consulting you could have been consulting she could have been consulting we could have been consulting you could have been consulting they could have been consulting
Negation
Simple form
I could not consult you could not consult she could not consult we could not consult you could not consult they could not consult
V-ing form
I could not be consulting you could not be consulting she could not be consulting we could not be consulting you could not be consulting they could not be consulting
Perfect
I could not have consulted you could not have consulted she could not have consulted we could not have consulted you could not have consulted they could not have consulted
V-ing perfect
I could not have been consulting you could not have been consulting she could not have been consulting we could not have been consulting you could not have been consulting they could not have been consulting
Interrogative form
Simple form
could I consult? could you consult? could she consult? could we consult? could you consult? could they consult?
V-ing form
could I be consulting? could you be consulting? could she be consulting? could we be consulting? could you be consulting? could they be consulting?
Perfect
could I have consulted? could you have consulted? could she have consulted? could we have consulted? could you have consulted? could they have consulted?
V-ing perfect
could I have been consulting? could you have been consulting? could she have been consulting? could we have been consulting? could you have been consulting? could they have been consulting?
Interro-negative form
Simple form
could I not consult? could you not consult? could she not consult? could we not consult? could you not consult? could they not consult?
V-ing form
could I not be consulting? could you not be consulting? could she not be consulting? could we not be consulting? could you not be consulting? could they not be consulting?
Perfect
could I not have consulted? could you not have consulted? could she not have consulted? could we not have consulted? could you not have consulted? could they not have consulted?
V-ing perfect
could I not have been consulting? could you not have been consulting? could she not have been consulting? could we not have been consulting? could you not have been consulting? could they not have been consulting?