I could ditch you could ditch he could ditch we could ditch you could ditch they could ditch
V-ing form
I could be ditching you could be ditching he could be ditching we could be ditching you could be ditching they could be ditching
Perfect
I could have ditched you could have ditched he could have ditched we could have ditched you could have ditched they could have ditched
V-ing perfect
I could have been ditching you could have been ditching he could have been ditching we could have been ditching you could have been ditching they could have been ditching
Negation
Simple form
I could not ditch you could not ditch he could not ditch we could not ditch you could not ditch they could not ditch
V-ing form
I could not be ditching you could not be ditching he could not be ditching we could not be ditching you could not be ditching they could not be ditching
Perfect
I could not have ditched you could not have ditched he could not have ditched we could not have ditched you could not have ditched they could not have ditched
V-ing perfect
I could not have been ditching you could not have been ditching he could not have been ditching we could not have been ditching you could not have been ditching they could not have been ditching
Interrogative form
Simple form
could I ditch? could you ditch? could he ditch? could we ditch? could you ditch? could they ditch?
V-ing form
could I be ditching? could you be ditching? could he be ditching? could we be ditching? could you be ditching? could they be ditching?
Perfect
could I have ditched? could you have ditched? could he have ditched? could we have ditched? could you have ditched? could they have ditched?
V-ing perfect
could I have been ditching? could you have been ditching? could he have been ditching? could we have been ditching? could you have been ditching? could they have been ditching?
Interro-negative form
Simple form
could I not ditch? could you not ditch? could he not ditch? could we not ditch? could you not ditch? could they not ditch?
V-ing form
could I not be ditching? could you not be ditching? could he not be ditching? could we not be ditching? could you not be ditching? could they not be ditching?
Perfect
could I not have ditched? could you not have ditched? could he not have ditched? could we not have ditched? could you not have ditched? could they not have ditched?
V-ing perfect
could I not have been ditching? could you not have been ditching? could he not have been ditching? could we not have been ditching? could you not have been ditching? could they not have been ditching?