I could punish you could punish she could punish we could punish you could punish they could punish
V-ing form
I could be punishing you could be punishing she could be punishing we could be punishing you could be punishing they could be punishing
Perfect
I could have punished you could have punished she could have punished we could have punished you could have punished they could have punished
V-ing perfect
I could have been punishing you could have been punishing she could have been punishing we could have been punishing you could have been punishing they could have been punishing
Negation
Simple form
I could not punish you could not punish she could not punish we could not punish you could not punish they could not punish
V-ing form
I could not be punishing you could not be punishing she could not be punishing we could not be punishing you could not be punishing they could not be punishing
Perfect
I could not have punished you could not have punished she could not have punished we could not have punished you could not have punished they could not have punished
V-ing perfect
I could not have been punishing you could not have been punishing she could not have been punishing we could not have been punishing you could not have been punishing they could not have been punishing
Interrogative form
Simple form
could I punish? could you punish? could she punish? could we punish? could you punish? could they punish?
V-ing form
could I be punishing? could you be punishing? could she be punishing? could we be punishing? could you be punishing? could they be punishing?
Perfect
could I have punished? could you have punished? could she have punished? could we have punished? could you have punished? could they have punished?
V-ing perfect
could I have been punishing? could you have been punishing? could she have been punishing? could we have been punishing? could you have been punishing? could they have been punishing?
Interro-negative form
Simple form
could I not punish? could you not punish? could she not punish? could we not punish? could you not punish? could they not punish?
V-ing form
could I not be punishing? could you not be punishing? could she not be punishing? could we not be punishing? could you not be punishing? could they not be punishing?
Perfect
could I not have punished? could you not have punished? could she not have punished? could we not have punished? could you not have punished? could they not have punished?
V-ing perfect
could I not have been punishing? could you not have been punishing? could she not have been punishing? could we not have been punishing? could you not have been punishing? could they not have been punishing?