I could give you could give he could give we could give you could give they could give
V-ing form
I could be giving you could be giving he could be giving we could be giving you could be giving they could be giving
Perfect
I could have given you could have given he could have given we could have given you could have given they could have given
V-ing perfect
I could have been giving you could have been giving he could have been giving we could have been giving you could have been giving they could have been giving
Negation
Simple form
I could not give you could not give he could not give we could not give you could not give they could not give
V-ing form
I could not be giving you could not be giving he could not be giving we could not be giving you could not be giving they could not be giving
Perfect
I could not have given you could not have given he could not have given we could not have given you could not have given they could not have given
V-ing perfect
I could not have been giving you could not have been giving he could not have been giving we could not have been giving you could not have been giving they could not have been giving
Interrogative form
Simple form
could I give? could you give? could he give? could we give? could you give? could they give?
V-ing form
could I be giving? could you be giving? could he be giving? could we be giving? could you be giving? could they be giving?
Perfect
could I have given? could you have given? could he have given? could we have given? could you have given? could they have given?
V-ing perfect
could I have been giving? could you have been giving? could he have been giving? could we have been giving? could you have been giving? could they have been giving?
Interro-negative form
Simple form
could I not give? could you not give? could he not give? could we not give? could you not give? could they not give?
V-ing form
could I not be giving? could you not be giving? could he not be giving? could we not be giving? could you not be giving? could they not be giving?
Perfect
could I not have given? could you not have given? could he not have given? could we not have given? could you not have given? could they not have given?
V-ing perfect
could I not have been giving? could you not have been giving? could he not have been giving? could we not have been giving? could you not have been giving? could they not have been giving?