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