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