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