I could audit you could audit she could audit we could audit you could audit they could audit
V-ing form
I could be auditing you could be auditing she could be auditing we could be auditing you could be auditing they could be auditing
Perfect
I could have audited you could have audited she could have audited we could have audited you could have audited they could have audited
V-ing perfect
I could have been auditing you could have been auditing she could have been auditing we could have been auditing you could have been auditing they could have been auditing
Negation
Simple form
I could not audit you could not audit she could not audit we could not audit you could not audit they could not audit
V-ing form
I could not be auditing you could not be auditing she could not be auditing we could not be auditing you could not be auditing they could not be auditing
Perfect
I could not have audited you could not have audited she could not have audited we could not have audited you could not have audited they could not have audited
V-ing perfect
I could not have been auditing you could not have been auditing she could not have been auditing we could not have been auditing you could not have been auditing they could not have been auditing
Interrogative form
Simple form
could I audit? could you audit? could she audit? could we audit? could you audit? could they audit?
V-ing form
could I be auditing? could you be auditing? could she be auditing? could we be auditing? could you be auditing? could they be auditing?
Perfect
could I have audited? could you have audited? could she have audited? could we have audited? could you have audited? could they have audited?
V-ing perfect
could I have been auditing? could you have been auditing? could she have been auditing? could we have been auditing? could you have been auditing? could they have been auditing?
Interro-negative form
Simple form
could I not audit? could you not audit? could she not audit? could we not audit? could you not audit? could they not audit?
V-ing form
could I not be auditing? could you not be auditing? could she not be auditing? could we not be auditing? could you not be auditing? could they not be auditing?
Perfect
could I not have audited? could you not have audited? could she not have audited? could we not have audited? could you not have audited? could they not have audited?
V-ing perfect
could I not have been auditing? could you not have been auditing? could she not have been auditing? could we not have been auditing? could you not have been auditing? could they not have been auditing?