I could barrack you could barrack he could barrack we could barrack you could barrack they could barrack
V-ing form
I could be barracking you could be barracking he could be barracking we could be barracking you could be barracking they could be barracking
Perfect
I could have barracked you could have barracked he could have barracked we could have barracked you could have barracked they could have barracked
V-ing perfect
I could have been barracking you could have been barracking he could have been barracking we could have been barracking you could have been barracking they could have been barracking
Negation
Simple form
I could not barrack you could not barrack he could not barrack we could not barrack you could not barrack they could not barrack
V-ing form
I could not be barracking you could not be barracking he could not be barracking we could not be barracking you could not be barracking they could not be barracking
Perfect
I could not have barracked you could not have barracked he could not have barracked we could not have barracked you could not have barracked they could not have barracked
V-ing perfect
I could not have been barracking you could not have been barracking he could not have been barracking we could not have been barracking you could not have been barracking they could not have been barracking
Interrogative form
Simple form
could I barrack? could you barrack? could he barrack? could we barrack? could you barrack? could they barrack?
V-ing form
could I be barracking? could you be barracking? could he be barracking? could we be barracking? could you be barracking? could they be barracking?
Perfect
could I have barracked? could you have barracked? could he have barracked? could we have barracked? could you have barracked? could they have barracked?
V-ing perfect
could I have been barracking? could you have been barracking? could he have been barracking? could we have been barracking? could you have been barracking? could they have been barracking?
Interro-negative form
Simple form
could I not barrack? could you not barrack? could he not barrack? could we not barrack? could you not barrack? could they not barrack?
V-ing form
could I not be barracking? could you not be barracking? could he not be barracking? could we not be barracking? could you not be barracking? could they not be barracking?
Perfect
could I not have barracked? could you not have barracked? could he not have barracked? could we not have barracked? could you not have barracked? could they not have barracked?
V-ing perfect
could I not have been barracking? could you not have been barracking? could he not have been barracking? could we not have been barracking? could you not have been barracking? could they not have been barracking?