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