I could brook you could brook she could brook we could brook you could brook they could brook
V-ing form
I could be brooking you could be brooking she could be brooking we could be brooking you could be brooking they could be brooking
Perfect
I could have brooked you could have brooked she could have brooked we could have brooked you could have brooked they could have brooked
V-ing perfect
I could have been brooking you could have been brooking she could have been brooking we could have been brooking you could have been brooking they could have been brooking
Negation
Simple form
I could not brook you could not brook she could not brook we could not brook you could not brook they could not brook
V-ing form
I could not be brooking you could not be brooking she could not be brooking we could not be brooking you could not be brooking they could not be brooking
Perfect
I could not have brooked you could not have brooked she could not have brooked we could not have brooked you could not have brooked they could not have brooked
V-ing perfect
I could not have been brooking you could not have been brooking she could not have been brooking we could not have been brooking you could not have been brooking they could not have been brooking
Interrogative form
Simple form
could I brook? could you brook? could she brook? could we brook? could you brook? could they brook?
V-ing form
could I be brooking? could you be brooking? could she be brooking? could we be brooking? could you be brooking? could they be brooking?
Perfect
could I have brooked? could you have brooked? could she have brooked? could we have brooked? could you have brooked? could they have brooked?
V-ing perfect
could I have been brooking? could you have been brooking? could she have been brooking? could we have been brooking? could you have been brooking? could they have been brooking?
Interro-negative form
Simple form
could I not brook? could you not brook? could she not brook? could we not brook? could you not brook? could they not brook?
V-ing form
could I not be brooking? could you not be brooking? could she not be brooking? could we not be brooking? could you not be brooking? could they not be brooking?
Perfect
could I not have brooked? could you not have brooked? could she not have brooked? could we not have brooked? could you not have brooked? could they not have brooked?
V-ing perfect
could I not have been brooking? could you not have been brooking? could she not have been brooking? could we not have been brooking? could you not have been brooking? could they not have been brooking?