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 couldn't give you couldn't give he couldn't give we couldn't give you couldn't give they couldn't give
V-ing form
I couldn't be giving you couldn't be giving he couldn't be giving we couldn't be giving you couldn't be giving they couldn't be giving
Perfect
I couldn't have given you couldn't have given he couldn't have given we couldn't have given you couldn't have given they couldn't have given
V-ing perfect
I couldn't have been giving you couldn't have been giving he couldn't have been giving we couldn't have been giving you couldn't have been giving they couldn't 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
couldn't I give? couldn't you give? couldn't he give? couldn't we give? couldn't you give? couldn't they give?
V-ing form
couldn't I be giving? couldn't you be giving? couldn't he be giving? couldn't we be giving? couldn't you be giving? couldn't they be giving?
Perfect
couldn't I have given? couldn't you have given? couldn't he have given? couldn't we have given? couldn't you have given? couldn't they have given?
V-ing perfect
couldn't I have been giving? couldn't you have been giving? couldn't he have been giving? couldn't we have been giving? couldn't you have been giving? couldn't they have been giving?