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