I could whack you could whack she could whack we could whack you could whack they could whack
V-ing form
I could be whacking you could be whacking she could be whacking we could be whacking you could be whacking they could be whacking
Perfect
I could have whacked you could have whacked she could have whacked we could have whacked you could have whacked they could have whacked
V-ing perfect
I could have been whacking you could have been whacking she could have been whacking we could have been whacking you could have been whacking they could have been whacking
Negation
Simple form
I could not whack you could not whack she could not whack we could not whack you could not whack they could not whack
V-ing form
I could not be whacking you could not be whacking she could not be whacking we could not be whacking you could not be whacking they could not be whacking
Perfect
I could not have whacked you could not have whacked she could not have whacked we could not have whacked you could not have whacked they could not have whacked
V-ing perfect
I could not have been whacking you could not have been whacking she could not have been whacking we could not have been whacking you could not have been whacking they could not have been whacking
Interrogative form
Simple form
could I whack? could you whack? could she whack? could we whack? could you whack? could they whack?
V-ing form
could I be whacking? could you be whacking? could she be whacking? could we be whacking? could you be whacking? could they be whacking?
Perfect
could I have whacked? could you have whacked? could she have whacked? could we have whacked? could you have whacked? could they have whacked?
V-ing perfect
could I have been whacking? could you have been whacking? could she have been whacking? could we have been whacking? could you have been whacking? could they have been whacking?
Interro-negative form
Simple form
could I not whack? could you not whack? could she not whack? could we not whack? could you not whack? could they not whack?
V-ing form
could I not be whacking? could you not be whacking? could she not be whacking? could we not be whacking? could you not be whacking? could they not be whacking?
Perfect
could I not have whacked? could you not have whacked? could she not have whacked? could we not have whacked? could you not have whacked? could they not have whacked?
V-ing perfect
could I not have been whacking? could you not have been whacking? could she not have been whacking? could we not have been whacking? could you not have been whacking? could they not have been whacking?