I could draft you could draft he could draft we could draft you could draft they could draft
V-ing form
I could be drafting you could be drafting he could be drafting we could be drafting you could be drafting they could be drafting
Perfect
I could have drafted you could have drafted he could have drafted we could have drafted you could have drafted they could have drafted
V-ing perfect
I could have been drafting you could have been drafting he could have been drafting we could have been drafting you could have been drafting they could have been drafting
Negation
Simple form
I couldn't draft you couldn't draft he couldn't draft we couldn't draft you couldn't draft they couldn't draft
V-ing form
I couldn't be drafting you couldn't be drafting he couldn't be drafting we couldn't be drafting you couldn't be drafting they couldn't be drafting
Perfect
I couldn't have drafted you couldn't have drafted he couldn't have drafted we couldn't have drafted you couldn't have drafted they couldn't have drafted
V-ing perfect
I couldn't have been drafting you couldn't have been drafting he couldn't have been drafting we couldn't have been drafting you couldn't have been drafting they couldn't have been drafting
Interrogative form
Simple form
could I draft? could you draft? could he draft? could we draft? could you draft? could they draft?
V-ing form
could I be drafting? could you be drafting? could he be drafting? could we be drafting? could you be drafting? could they be drafting?
Perfect
could I have drafted? could you have drafted? could he have drafted? could we have drafted? could you have drafted? could they have drafted?
V-ing perfect
could I have been drafting? could you have been drafting? could he have been drafting? could we have been drafting? could you have been drafting? could they have been drafting?
Interro-negative form
Simple form
couldn't I draft? couldn't you draft? couldn't he draft? couldn't we draft? couldn't you draft? couldn't they draft?
V-ing form
couldn't I be drafting? couldn't you be drafting? couldn't he be drafting? couldn't we be drafting? couldn't you be drafting? couldn't they be drafting?
Perfect
couldn't I have drafted? couldn't you have drafted? couldn't he have drafted? couldn't we have drafted? couldn't you have drafted? couldn't they have drafted?
V-ing perfect
couldn't I have been drafting? couldn't you have been drafting? couldn't he have been drafting? couldn't we have been drafting? couldn't you have been drafting? couldn't they have been drafting?