I could debit you could debit she could debit we could debit you could debit they could debit
V-ing form
I could be debiting you could be debiting she could be debiting we could be debiting you could be debiting they could be debiting
Perfect
I could have debited you could have debited she 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 she 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 she 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 she 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 she 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 she 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 she debit? could we debit? could you debit? could they debit?
V-ing form
could I be debiting? could you be debiting? could she be debiting? could we be debiting? could you be debiting? could they be debiting?
Perfect
could I have debited? could you have debited? could she 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 she 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 she 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 she 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 she 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 she have been debiting? couldn't we have been debiting? couldn't you have been debiting? couldn't they have been debiting?