Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could detaler you could detaler she could detaler we could detaler you could detaler they could detaler
V-ing form
I could be detalering you could be detalering she could be detalering we could be detalering you could be detalering they could be detalering
Perfect
I could have detalered you could have detalered she could have detalered we could have detalered you could have detalered they could have detalered
V-ing perfect
I could have been detalering you could have been detalering she could have been detalering we could have been detalering you could have been detalering they could have been detalering
Negation
Simple form
I could not detaler you could not detaler she could not detaler we could not detaler you could not detaler they could not detaler
V-ing form
I could not be detalering you could not be detalering she could not be detalering we could not be detalering you could not be detalering they could not be detalering
Perfect
I could not have detalered you could not have detalered she could not have detalered we could not have detalered you could not have detalered they could not have detalered
V-ing perfect
I could not have been detalering you could not have been detalering she could not have been detalering we could not have been detalering you could not have been detalering they could not have been detalering
Interrogative form
Simple form
could I detaler? could you detaler? could she detaler? could we detaler? could you detaler? could they detaler?
V-ing form
could I be detalering? could you be detalering? could she be detalering? could we be detalering? could you be detalering? could they be detalering?
Perfect
could I have detalered? could you have detalered? could she have detalered? could we have detalered? could you have detalered? could they have detalered?
V-ing perfect
could I have been detalering? could you have been detalering? could she have been detalering? could we have been detalering? could you have been detalering? could they have been detalering?
Interro-negative form
Simple form
could I not detaler? could you not detaler? could she not detaler? could we not detaler? could you not detaler? could they not detaler?
V-ing form
could I not be detalering? could you not be detalering? could she not be detalering? could we not be detalering? could you not be detalering? could they not be detalering?
Perfect
could I not have detalered? could you not have detalered? could she not have detalered? could we not have detalered? could you not have detalered? could they not have detalered?
V-ing perfect
could I not have been detalering? could you not have been detalering? could she not have been detalering? could we not have been detalering? could you not have been detalering? could they not have been detalering?