I could rollick you could rollick he could rollick we could rollick you could rollick they could rollick
V-ing form
I could be rollicking you could be rollicking he could be rollicking we could be rollicking you could be rollicking they could be rollicking
Perfect
I could have rollicked you could have rollicked he could have rollicked we could have rollicked you could have rollicked they could have rollicked
V-ing perfect
I could have been rollicking you could have been rollicking he could have been rollicking we could have been rollicking you could have been rollicking they could have been rollicking
Negation
Simple form
I could not rollick you could not rollick he could not rollick we could not rollick you could not rollick they could not rollick
V-ing form
I could not be rollicking you could not be rollicking he could not be rollicking we could not be rollicking you could not be rollicking they could not be rollicking
Perfect
I could not have rollicked you could not have rollicked he could not have rollicked we could not have rollicked you could not have rollicked they could not have rollicked
V-ing perfect
I could not have been rollicking you could not have been rollicking he could not have been rollicking we could not have been rollicking you could not have been rollicking they could not have been rollicking
Interrogative form
Simple form
could I rollick? could you rollick? could he rollick? could we rollick? could you rollick? could they rollick?
V-ing form
could I be rollicking? could you be rollicking? could he be rollicking? could we be rollicking? could you be rollicking? could they be rollicking?
Perfect
could I have rollicked? could you have rollicked? could he have rollicked? could we have rollicked? could you have rollicked? could they have rollicked?
V-ing perfect
could I have been rollicking? could you have been rollicking? could he have been rollicking? could we have been rollicking? could you have been rollicking? could they have been rollicking?
Interro-negative form
Simple form
could I not rollick? could you not rollick? could he not rollick? could we not rollick? could you not rollick? could they not rollick?
V-ing form
could I not be rollicking? could you not be rollicking? could he not be rollicking? could we not be rollicking? could you not be rollicking? could they not be rollicking?
Perfect
could I not have rollicked? could you not have rollicked? could he not have rollicked? could we not have rollicked? could you not have rollicked? could they not have rollicked?
V-ing perfect
could I not have been rollicking? could you not have been rollicking? could he not have been rollicking? could we not have been rollicking? could you not have been rollicking? could they not have been rollicking?