could revolve
Regular verb: revolve - revolved- revolved

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