I could barrack you could barrack she could barrack we could barrack you could barrack they could barrack
V-ing form
I could be barracking you could be barracking she could be barracking we could be barracking you could be barracking they could be barracking
Perfect
I could have barracked you could have barracked she 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 she could have been barracking we could have been barracking you could have been barracking they could have been barracking
Negation
Simple form
I couldn't barrack you couldn't barrack she couldn't barrack we couldn't barrack you couldn't barrack they couldn't barrack
V-ing form
I couldn't be barracking you couldn't be barracking she couldn't be barracking we couldn't be barracking you couldn't be barracking they couldn't be barracking
Perfect
I couldn't have barracked you couldn't have barracked she couldn't have barracked we couldn't have barracked you couldn't have barracked they couldn't have barracked
V-ing perfect
I couldn't have been barracking you couldn't have been barracking she couldn't have been barracking we couldn't have been barracking you couldn't have been barracking they couldn't have been barracking
Interrogative form
Simple form
could I barrack? could you barrack? could she barrack? could we barrack? could you barrack? could they barrack?
V-ing form
could I be barracking? could you be barracking? could she be barracking? could we be barracking? could you be barracking? could they be barracking?
Perfect
could I have barracked? could you have barracked? could she 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 she have been barracking? could we have been barracking? could you have been barracking? could they have been barracking?
Interro-negative form
Simple form
couldn't I barrack? couldn't you barrack? couldn't she barrack? couldn't we barrack? couldn't you barrack? couldn't they barrack?
V-ing form
couldn't I be barracking? couldn't you be barracking? couldn't she be barracking? couldn't we be barracking? couldn't you be barracking? couldn't they be barracking?
Perfect
couldn't I have barracked? couldn't you have barracked? couldn't she have barracked? couldn't we have barracked? couldn't you have barracked? couldn't they have barracked?
V-ing perfect
couldn't I have been barracking? couldn't you have been barracking? couldn't she have been barracking? couldn't we have been barracking? couldn't you have been barracking? couldn't they have been barracking?