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 couldn't rollick you couldn't rollick he couldn't rollick we couldn't rollick you couldn't rollick they couldn't rollick
V-ing form
I couldn't be rollicking you couldn't be rollicking he couldn't be rollicking we couldn't be rollicking you couldn't be rollicking they couldn't be rollicking
Perfect
I couldn't have rollicked you couldn't have rollicked he couldn't have rollicked we couldn't have rollicked you couldn't have rollicked they couldn't have rollicked
V-ing perfect
I couldn't have been rollicking you couldn't have been rollicking he couldn't have been rollicking we couldn't have been rollicking you couldn't have been rollicking they couldn't 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
couldn't I rollick? couldn't you rollick? couldn't he rollick? couldn't we rollick? couldn't you rollick? couldn't they rollick?
V-ing form
couldn't I be rollicking? couldn't you be rollicking? couldn't he be rollicking? couldn't we be rollicking? couldn't you be rollicking? couldn't they be rollicking?
Perfect
couldn't I have rollicked? couldn't you have rollicked? couldn't he have rollicked? couldn't we have rollicked? couldn't you have rollicked? couldn't they have rollicked?
V-ing perfect
couldn't I have been rollicking? couldn't you have been rollicking? couldn't he have been rollicking? couldn't we have been rollicking? couldn't you have been rollicking? couldn't they have been rollicking?