I could linger you could linger he could linger we could linger you could linger they could linger
V-ing form
I could be lingering you could be lingering he could be lingering we could be lingering you could be lingering they could be lingering
Perfect
I could have lingered you could have lingered he could have lingered we could have lingered you could have lingered they could have lingered
V-ing perfect
I could have been lingering you could have been lingering he could have been lingering we could have been lingering you could have been lingering they could have been lingering
Negation
Simple form
I could not linger you could not linger he could not linger we could not linger you could not linger they could not linger
V-ing form
I could not be lingering you could not be lingering he could not be lingering we could not be lingering you could not be lingering they could not be lingering
Perfect
I could not have lingered you could not have lingered he could not have lingered we could not have lingered you could not have lingered they could not have lingered
V-ing perfect
I could not have been lingering you could not have been lingering he could not have been lingering we could not have been lingering you could not have been lingering they could not have been lingering
Interrogative form
Simple form
could I linger? could you linger? could he linger? could we linger? could you linger? could they linger?
V-ing form
could I be lingering? could you be lingering? could he be lingering? could we be lingering? could you be lingering? could they be lingering?
Perfect
could I have lingered? could you have lingered? could he have lingered? could we have lingered? could you have lingered? could they have lingered?
V-ing perfect
could I have been lingering? could you have been lingering? could he have been lingering? could we have been lingering? could you have been lingering? could they have been lingering?
Interro-negative form
Simple form
could I not linger? could you not linger? could he not linger? could we not linger? could you not linger? could they not linger?
V-ing form
could I not be lingering? could you not be lingering? could he not be lingering? could we not be lingering? could you not be lingering? could they not be lingering?
Perfect
could I not have lingered? could you not have lingered? could he not have lingered? could we not have lingered? could you not have lingered? could they not have lingered?
V-ing perfect
could I not have been lingering? could you not have been lingering? could he not have been lingering? could we not have been lingering? could you not have been lingering? could they not have been lingering?