English verb conjugation
COULD REVOLVE

Regular verb: revolve - revolved - revolved

Affirmation

Simple form	V-ing form
I could revolve you could revolve he could revolve we could revolve you could revolve they could revolve	I could be revolving you could be revolving he could be revolving we could be revolving you could be revolving they could be revolving
Perfect	V-ing perfect
I could have revolved you could have revolved he could have revolved we could have revolved you could have revolved they could have revolved	I could have been revolving you could have been revolving he could have been revolving we could have been revolving you could have been revolving they could have been revolving

Negation

Simple form	V-ing form
I could not revolve you could not revolve he could not revolve we could not revolve you could not revolve they could not revolve	I could not be revolving you could not be revolving he could not be revolving we could not be revolving you could not be revolving they could not be revolving
Perfect	V-ing perfect
I could not have revolved you could not have revolved he could not have revolved we could not have revolved you could not have revolved they could not have revolved	I could not have been revolving you could not have been revolving he could not have been revolving we could not have been revolving you could not have been revolving they could not have been revolving

Interrogative form

Simple form	V-ing form
could I revolve? could you revolve? could he revolve? could we revolve? could you revolve? could they revolve?	could I be revolving? could you be revolving? could he be revolving? could we be revolving? could you be revolving? could they be revolving?
Perfect	V-ing perfect
could I have revolved? could you have revolved? could he have revolved? could we have revolved? could you have revolved? could they have revolved?	could I have been revolving? could you have been revolving? could he have been revolving? could we have been revolving? could you have been revolving? could they have been revolving?

Interro-negative form

Simple form	V-ing form
could I not revolve? could you not revolve? could he not revolve? could we not revolve? could you not revolve? could they not revolve?	could I not be revolving? could you not be revolving? could he not be revolving? could we not be revolving? could you not be revolving? could they not be revolving?
Perfect	V-ing perfect
could I not have revolved? could you not have revolved? could he not have revolved? could we not have revolved? could you not have revolved? could they not have revolved?	could I not have been revolving? could you not have been revolving? could he not have been revolving? could we not have been revolving? could you not have been revolving? could they not have been revolving?