Warning, this verb may not exist. Conjugation is given as example.
Affirmation
Simple form
I could roll up you could roll up she could roll up we could roll up you could roll up they could roll up
V-ing form
I could be roll uping you could be roll uping she could be roll uping we could be roll uping you could be roll uping they could be roll uping
Perfect
I could have roll uped you could have roll uped she could have roll uped we could have roll uped you could have roll uped they could have roll uped
V-ing perfect
I could have been roll uping you could have been roll uping she could have been roll uping we could have been roll uping you could have been roll uping they could have been roll uping
Negation
Simple form
I couldn't roll up you couldn't roll up she couldn't roll up we couldn't roll up you couldn't roll up they couldn't roll up
V-ing form
I couldn't be roll uping you couldn't be roll uping she couldn't be roll uping we couldn't be roll uping you couldn't be roll uping they couldn't be roll uping
Perfect
I couldn't have roll uped you couldn't have roll uped she couldn't have roll uped we couldn't have roll uped you couldn't have roll uped they couldn't have roll uped
V-ing perfect
I couldn't have been roll uping you couldn't have been roll uping she couldn't have been roll uping we couldn't have been roll uping you couldn't have been roll uping they couldn't have been roll uping
Interrogative form
Simple form
could I roll up? could you roll up? could she roll up? could we roll up? could you roll up? could they roll up?
V-ing form
could I be roll uping? could you be roll uping? could she be roll uping? could we be roll uping? could you be roll uping? could they be roll uping?
Perfect
could I have roll uped? could you have roll uped? could she have roll uped? could we have roll uped? could you have roll uped? could they have roll uped?
V-ing perfect
could I have been roll uping? could you have been roll uping? could she have been roll uping? could we have been roll uping? could you have been roll uping? could they have been roll uping?
Interro-negative form
Simple form
couldn't I roll up? couldn't you roll up? couldn't she roll up? couldn't we roll up? couldn't you roll up? couldn't they roll up?
V-ing form
couldn't I be roll uping? couldn't you be roll uping? couldn't she be roll uping? couldn't we be roll uping? couldn't you be roll uping? couldn't they be roll uping?
Perfect
couldn't I have roll uped? couldn't you have roll uped? couldn't she have roll uped? couldn't we have roll uped? couldn't you have roll uped? couldn't they have roll uped?
V-ing perfect
couldn't I have been roll uping? couldn't you have been roll uping? couldn't she have been roll uping? couldn't we have been roll uping? couldn't you have been roll uping? couldn't they have been roll uping?