I could account you could account he could account we could account you could account they could account
V-ing form
I could be accounting you could be accounting he could be accounting we could be accounting you could be accounting they could be accounting
Perfect
I could have accounted you could have accounted he could have accounted we could have accounted you could have accounted they could have accounted
V-ing perfect
I could have been accounting you could have been accounting he could have been accounting we could have been accounting you could have been accounting they could have been accounting
Negation
Simple form
I could not account you could not account he could not account we could not account you could not account they could not account
V-ing form
I could not be accounting you could not be accounting he could not be accounting we could not be accounting you could not be accounting they could not be accounting
Perfect
I could not have accounted you could not have accounted he could not have accounted we could not have accounted you could not have accounted they could not have accounted
V-ing perfect
I could not have been accounting you could not have been accounting he could not have been accounting we could not have been accounting you could not have been accounting they could not have been accounting
Interrogative form
Simple form
could I account? could you account? could he account? could we account? could you account? could they account?
V-ing form
could I be accounting? could you be accounting? could he be accounting? could we be accounting? could you be accounting? could they be accounting?
Perfect
could I have accounted? could you have accounted? could he have accounted? could we have accounted? could you have accounted? could they have accounted?
V-ing perfect
could I have been accounting? could you have been accounting? could he have been accounting? could we have been accounting? could you have been accounting? could they have been accounting?
Interro-negative form
Simple form
could I not account? could you not account? could he not account? could we not account? could you not account? could they not account?
V-ing form
could I not be accounting? could you not be accounting? could he not be accounting? could we not be accounting? could you not be accounting? could they not be accounting?
Perfect
could I not have accounted? could you not have accounted? could he not have accounted? could we not have accounted? could you not have accounted? could they not have accounted?
V-ing perfect
could I not have been accounting? could you not have been accounting? could he not have been accounting? could we not have been accounting? could you not have been accounting? could they not have been accounting?