I could candy you could candy she could candy we could candy you could candy they could candy
V-ing form
I could be candying you could be candying she could be candying we could be candying you could be candying they could be candying
Perfect
I could have candied you could have candied she could have candied we could have candied you could have candied they could have candied
V-ing perfect
I could have been candying you could have been candying she could have been candying we could have been candying you could have been candying they could have been candying
Negation
Simple form
I could not candy you could not candy she could not candy we could not candy you could not candy they could not candy
V-ing form
I could not be candying you could not be candying she could not be candying we could not be candying you could not be candying they could not be candying
Perfect
I could not have candied you could not have candied she could not have candied we could not have candied you could not have candied they could not have candied
V-ing perfect
I could not have been candying you could not have been candying she could not have been candying we could not have been candying you could not have been candying they could not have been candying
Interrogative form
Simple form
could I candy? could you candy? could she candy? could we candy? could you candy? could they candy?
V-ing form
could I be candying? could you be candying? could she be candying? could we be candying? could you be candying? could they be candying?
Perfect
could I have candied? could you have candied? could she have candied? could we have candied? could you have candied? could they have candied?
V-ing perfect
could I have been candying? could you have been candying? could she have been candying? could we have been candying? could you have been candying? could they have been candying?
Interro-negative form
Simple form
could I not candy? could you not candy? could she not candy? could we not candy? could you not candy? could they not candy?
V-ing form
could I not be candying? could you not be candying? could she not be candying? could we not be candying? could you not be candying? could they not be candying?
Perfect
could I not have candied? could you not have candied? could she not have candied? could we not have candied? could you not have candied? could they not have candied?
V-ing perfect
could I not have been candying? could you not have been candying? could she not have been candying? could we not have been candying? could you not have been candying? could they not have been candying?