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 couldn't create you couldn't create he couldn't create we couldn't create you couldn't create they couldn't create
V-ing form
I couldn't be creating you couldn't be creating he couldn't be creating we couldn't be creating you couldn't be creating they couldn't be creating
Perfect
I couldn't have created you couldn't have created he couldn't have created we couldn't have created you couldn't have created they couldn't have created
V-ing perfect
I couldn't have been creating you couldn't have been creating he couldn't have been creating we couldn't have been creating you couldn't have been creating they couldn't 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
couldn't I create? couldn't you create? couldn't he create? couldn't we create? couldn't you create? couldn't they create?
V-ing form
couldn't I be creating? couldn't you be creating? couldn't he be creating? couldn't we be creating? couldn't you be creating? couldn't they be creating?
Perfect
couldn't I have created? couldn't you have created? couldn't he have created? couldn't we have created? couldn't you have created? couldn't they have created?
V-ing perfect
couldn't I have been creating? couldn't you have been creating? couldn't he have been creating? couldn't we have been creating? couldn't you have been creating? couldn't they have been creating?