I could tope you could tope she could tope we could tope you could tope they could tope
V-ing form
I could be toping you could be toping she could be toping we could be toping you could be toping they could be toping
Perfect
I could have toped you could have toped she could have toped we could have toped you could have toped they could have toped
V-ing perfect
I could have been toping you could have been toping she could have been toping we could have been toping you could have been toping they could have been toping
Negation
Simple form
I could not tope you could not tope she could not tope we could not tope you could not tope they could not tope
V-ing form
I could not be toping you could not be toping she could not be toping we could not be toping you could not be toping they could not be toping
Perfect
I could not have toped you could not have toped she could not have toped we could not have toped you could not have toped they could not have toped
V-ing perfect
I could not have been toping you could not have been toping she could not have been toping we could not have been toping you could not have been toping they could not have been toping
Interrogative form
Simple form
could I tope? could you tope? could she tope? could we tope? could you tope? could they tope?
V-ing form
could I be toping? could you be toping? could she be toping? could we be toping? could you be toping? could they be toping?
Perfect
could I have toped? could you have toped? could she have toped? could we have toped? could you have toped? could they have toped?
V-ing perfect
could I have been toping? could you have been toping? could she have been toping? could we have been toping? could you have been toping? could they have been toping?
Interro-negative form
Simple form
could I not tope? could you not tope? could she not tope? could we not tope? could you not tope? could they not tope?
V-ing form
could I not be toping? could you not be toping? could she not be toping? could we not be toping? could you not be toping? could they not be toping?
Perfect
could I not have toped? could you not have toped? could she not have toped? could we not have toped? could you not have toped? could they not have toped?
V-ing perfect
could I not have been toping? could you not have been toping? could she not have been toping? could we not have been toping? could you not have been toping? could they not have been toping?