I could supply you could supply she could supply we could supply you could supply they could supply
V-ing form
I could be supplying you could be supplying she could be supplying we could be supplying you could be supplying they could be supplying
Perfect
I could have supplied you could have supplied she could have supplied we could have supplied you could have supplied they could have supplied
V-ing perfect
I could have been supplying you could have been supplying she could have been supplying we could have been supplying you could have been supplying they could have been supplying
Negation
Simple form
I could not supply you could not supply she could not supply we could not supply you could not supply they could not supply
V-ing form
I could not be supplying you could not be supplying she could not be supplying we could not be supplying you could not be supplying they could not be supplying
Perfect
I could not have supplied you could not have supplied she could not have supplied we could not have supplied you could not have supplied they could not have supplied
V-ing perfect
I could not have been supplying you could not have been supplying she could not have been supplying we could not have been supplying you could not have been supplying they could not have been supplying
Interrogative form
Simple form
could I supply? could you supply? could she supply? could we supply? could you supply? could they supply?
V-ing form
could I be supplying? could you be supplying? could she be supplying? could we be supplying? could you be supplying? could they be supplying?
Perfect
could I have supplied? could you have supplied? could she have supplied? could we have supplied? could you have supplied? could they have supplied?
V-ing perfect
could I have been supplying? could you have been supplying? could she have been supplying? could we have been supplying? could you have been supplying? could they have been supplying?
Interro-negative form
Simple form
could I not supply? could you not supply? could she not supply? could we not supply? could you not supply? could they not supply?
V-ing form
could I not be supplying? could you not be supplying? could she not be supplying? could we not be supplying? could you not be supplying? could they not be supplying?
Perfect
could I not have supplied? could you not have supplied? could she not have supplied? could we not have supplied? could you not have supplied? could they not have supplied?
V-ing perfect
could I not have been supplying? could you not have been supplying? could she not have been supplying? could we not have been supplying? could you not have been supplying? could they not have been supplying?