could circumvolve
Regular verb: circumvolve - circumvolved- circumvolved

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could circumvolve
you could circumvolve
she could circumvolve
we could circumvolve
you could circumvolve
they could circumvolve 	I could be circumvolving
you could be circumvolving
she could be circumvolving
we could be circumvolving
you could be circumvolving
they could be circumvolving	I could have circumvolved
you could have circumvolved
she could have circumvolved
we could have circumvolved
you could have circumvolved
they could have circumvolved	I could have been circumvolving
you could have been circumvolving
she could have been circumvolving
we could have been circumvolving
you could have been circumvolving
they could have been circumvolving	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not circumvolve
you could not circumvolve
she could not circumvolve
we could not circumvolve
you could not circumvolve
they could not circumvolve 	I could not be circumvolving
you could not be circumvolving
she could not be circumvolving
we could not be circumvolving
you could not be circumvolving
they could not be circumvolving	I could not have circumvolved
you could not have circumvolved
she could not have circumvolved
we could not have circumvolved
you could not have circumvolved
they could not have circumvolved	I could not have been circumvolving
you could not have been circumvolving
she could not have been circumvolving
we could not have been circumvolving
you could not have been circumvolving
they could not have been circumvolving	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I circumvolve?
could you circumvolve?
could she circumvolve?
could we circumvolve?
could you circumvolve?
could they circumvolve? 	could I be circumvolving?
could you be circumvolving?
could she be circumvolving?
could we be circumvolving?
could you be circumvolving?
could they be circumvolving? 	could I have circumvolved?
could you have circumvolved?
could she have circumvolved?
could we have circumvolved?
could you have circumvolved?
could they have circumvolved? 	could I have been circumvolving?
could you have been circumvolving?
could she have been circumvolving?
could we have been circumvolving?
could you have been circumvolving?
could they have been circumvolving? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not circumvolve?
could you not circumvolve?
could she not circumvolve?
could we not circumvolve?
could you not circumvolve?
could they not circumvolve? 	could I not be circumvolving?
could you not be circumvolving?
could she not be circumvolving?
could we not be circumvolving?
could you not be circumvolving?
could they not be circumvolving? 	could I not have circumvolved?
could you not have circumvolved?
could she not have circumvolved?
could we not have circumvolved?
could you not have circumvolved?
could they not have circumvolved? 	could I not have been circumvolving?
could you not have been circumvolving?
could she not have been circumvolving?
could we not have been circumvolving?
could you not have been circumvolving?
could they not have been circumvolving?