I could detach you could detach she could detach we could detach you could detach they could detach
V-ing form
I could be detaching you could be detaching she could be detaching we could be detaching you could be detaching they could be detaching
Perfect
I could have detached you could have detached she could have detached we could have detached you could have detached they could have detached
V-ing perfect
I could have been detaching you could have been detaching she could have been detaching we could have been detaching you could have been detaching they could have been detaching
Negation
Simple form
I could not detach you could not detach she could not detach we could not detach you could not detach they could not detach
V-ing form
I could not be detaching you could not be detaching she could not be detaching we could not be detaching you could not be detaching they could not be detaching
Perfect
I could not have detached you could not have detached she could not have detached we could not have detached you could not have detached they could not have detached
V-ing perfect
I could not have been detaching you could not have been detaching she could not have been detaching we could not have been detaching you could not have been detaching they could not have been detaching
Interrogative form
Simple form
could I detach? could you detach? could she detach? could we detach? could you detach? could they detach?
V-ing form
could I be detaching? could you be detaching? could she be detaching? could we be detaching? could you be detaching? could they be detaching?
Perfect
could I have detached? could you have detached? could she have detached? could we have detached? could you have detached? could they have detached?
V-ing perfect
could I have been detaching? could you have been detaching? could she have been detaching? could we have been detaching? could you have been detaching? could they have been detaching?
Interro-negative form
Simple form
could I not detach? could you not detach? could she not detach? could we not detach? could you not detach? could they not detach?
V-ing form
could I not be detaching? could you not be detaching? could she not be detaching? could we not be detaching? could you not be detaching? could they not be detaching?
Perfect
could I not have detached? could you not have detached? could she not have detached? could we not have detached? could you not have detached? could they not have detached?
V-ing perfect
could I not have been detaching? could you not have been detaching? could she not have been detaching? could we not have been detaching? could you not have been detaching? could they not have been detaching?