I could criticize you could criticize he could criticize we could criticize you could criticize they could criticize
V-ing form
I could be criticizing you could be criticizing he could be criticizing we could be criticizing you could be criticizing they could be criticizing
Perfect
I could have criticized you could have criticized he could have criticized we could have criticized you could have criticized they could have criticized
V-ing perfect
I could have been criticizing you could have been criticizing he could have been criticizing we could have been criticizing you could have been criticizing they could have been criticizing
Negation
Simple form
I could not criticize you could not criticize he could not criticize we could not criticize you could not criticize they could not criticize
V-ing form
I could not be criticizing you could not be criticizing he could not be criticizing we could not be criticizing you could not be criticizing they could not be criticizing
Perfect
I could not have criticized you could not have criticized he could not have criticized we could not have criticized you could not have criticized they could not have criticized
V-ing perfect
I could not have been criticizing you could not have been criticizing he could not have been criticizing we could not have been criticizing you could not have been criticizing they could not have been criticizing
Interrogative form
Simple form
could I criticize? could you criticize? could he criticize? could we criticize? could you criticize? could they criticize?
V-ing form
could I be criticizing? could you be criticizing? could he be criticizing? could we be criticizing? could you be criticizing? could they be criticizing?
Perfect
could I have criticized? could you have criticized? could he have criticized? could we have criticized? could you have criticized? could they have criticized?
V-ing perfect
could I have been criticizing? could you have been criticizing? could he have been criticizing? could we have been criticizing? could you have been criticizing? could they have been criticizing?
Interro-negative form
Simple form
could I not criticize? could you not criticize? could he not criticize? could we not criticize? could you not criticize? could they not criticize?
V-ing form
could I not be criticizing? could you not be criticizing? could he not be criticizing? could we not be criticizing? could you not be criticizing? could they not be criticizing?
Perfect
could I not have criticized? could you not have criticized? could he not have criticized? could we not have criticized? could you not have criticized? could they not have criticized?
V-ing perfect
could I not have been criticizing? could you not have been criticizing? could he not have been criticizing? could we not have been criticizing? could you not have been criticizing? could they not have been criticizing?