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 couldn't ditch you couldn't ditch he couldn't ditch we couldn't ditch you couldn't ditch they couldn't ditch
V-ing form
I couldn't be ditching you couldn't be ditching he couldn't be ditching we couldn't be ditching you couldn't be ditching they couldn't be ditching
Perfect
I couldn't have ditched you couldn't have ditched he couldn't have ditched we couldn't have ditched you couldn't have ditched they couldn't have ditched
V-ing perfect
I couldn't have been ditching you couldn't have been ditching he couldn't have been ditching we couldn't have been ditching you couldn't have been ditching they couldn't 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
couldn't I ditch? couldn't you ditch? couldn't he ditch? couldn't we ditch? couldn't you ditch? couldn't they ditch?
V-ing form
couldn't I be ditching? couldn't you be ditching? couldn't he be ditching? couldn't we be ditching? couldn't you be ditching? couldn't they be ditching?
Perfect
couldn't I have ditched? couldn't you have ditched? couldn't he have ditched? couldn't we have ditched? couldn't you have ditched? couldn't they have ditched?
V-ing perfect
couldn't I have been ditching? couldn't you have been ditching? couldn't he have been ditching? couldn't we have been ditching? couldn't you have been ditching? couldn't they have been ditching?