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