English verb conjugation
COULD DISBELIEVE

Regular verb: disbelieve - disbelieved - disbelieved

Affirmation

Simple form	V-ing form
I could disbelieve you could disbelieve he could disbelieve we could disbelieve you could disbelieve they could disbelieve	I could be disbelieving you could be disbelieving he could be disbelieving we could be disbelieving you could be disbelieving they could be disbelieving
Perfect	V-ing perfect
I could have disbelieved you could have disbelieved he could have disbelieved we could have disbelieved you could have disbelieved they could have disbelieved	I could have been disbelieving you could have been disbelieving he could have been disbelieving we could have been disbelieving you could have been disbelieving they could have been disbelieving

Negation

Simple form	V-ing form
I could not disbelieve you could not disbelieve he could not disbelieve we could not disbelieve you could not disbelieve they could not disbelieve	I could not be disbelieving you could not be disbelieving he could not be disbelieving we could not be disbelieving you could not be disbelieving they could not be disbelieving
Perfect	V-ing perfect
I could not have disbelieved you could not have disbelieved he could not have disbelieved we could not have disbelieved you could not have disbelieved they could not have disbelieved	I could not have been disbelieving you could not have been disbelieving he could not have been disbelieving we could not have been disbelieving you could not have been disbelieving they could not have been disbelieving

Interrogative form

Simple form	V-ing form
could I disbelieve? could you disbelieve? could he disbelieve? could we disbelieve? could you disbelieve? could they disbelieve?	could I be disbelieving? could you be disbelieving? could he be disbelieving? could we be disbelieving? could you be disbelieving? could they be disbelieving?
Perfect	V-ing perfect
could I have disbelieved? could you have disbelieved? could he have disbelieved? could we have disbelieved? could you have disbelieved? could they have disbelieved?	could I have been disbelieving? could you have been disbelieving? could he have been disbelieving? could we have been disbelieving? could you have been disbelieving? could they have been disbelieving?

Interro-negative form

Simple form	V-ing form
could I not disbelieve? could you not disbelieve? could he not disbelieve? could we not disbelieve? could you not disbelieve? could they not disbelieve?	could I not be disbelieving? could you not be disbelieving? could he not be disbelieving? could we not be disbelieving? could you not be disbelieving? could they not be disbelieving?
Perfect	V-ing perfect
could I not have disbelieved? could you not have disbelieved? could he not have disbelieved? could we not have disbelieved? could you not have disbelieved? could they not have disbelieved?	could I not have been disbelieving? could you not have been disbelieving? could he not have been disbelieving? could we not have been disbelieving? could you not have been disbelieving? could they not have been disbelieving?