I could create you could create he could create we could create you could create they could create
V-ing form
I could be creating you could be creating he could be creating we could be creating you could be creating they could be creating
Perfect
I could have created you could have created he could have created we could have created you could have created they could have created
V-ing perfect
I could have been creating you could have been creating he could have been creating we could have been creating you could have been creating they could have been creating
Negation
Simple form
I could not create you could not create he could not create we could not create you could not create they could not create
V-ing form
I could not be creating you could not be creating he could not be creating we could not be creating you could not be creating they could not be creating
Perfect
I could not have created you could not have created he could not have created we could not have created you could not have created they could not have created
V-ing perfect
I could not have been creating you could not have been creating he could not have been creating we could not have been creating you could not have been creating they could not have been creating
Interrogative form
Simple form
could I create? could you create? could he create? could we create? could you create? could they create?
V-ing form
could I be creating? could you be creating? could he be creating? could we be creating? could you be creating? could they be creating?
Perfect
could I have created? could you have created? could he have created? could we have created? could you have created? could they have created?
V-ing perfect
could I have been creating? could you have been creating? could he have been creating? could we have been creating? could you have been creating? could they have been creating?
Interro-negative form
Simple form
could I not create? could you not create? could he not create? could we not create? could you not create? could they not create?
V-ing form
could I not be creating? could you not be creating? could he not be creating? could we not be creating? could you not be creating? could they not be creating?
Perfect
could I not have created? could you not have created? could he not have created? could we not have created? could you not have created? could they not have created?
V-ing perfect
could I not have been creating? could you not have been creating? could he not have been creating? could we not have been creating? could you not have been creating? could they not have been creating?