could copulate
Regular verb: copulate - copulated- copulated

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could copulate
you could copulate
she could copulate
we could copulate
you could copulate
they could copulate 	I could be copulating
you could be copulating
she could be copulating
we could be copulating
you could be copulating
they could be copulating	I could have copulated
you could have copulated
she could have copulated
we could have copulated
you could have copulated
they could have copulated	I could have been copulating
you could have been copulating
she could have been copulating
we could have been copulating
you could have been copulating
they could have been copulating	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not copulate
you could not copulate
she could not copulate
we could not copulate
you could not copulate
they could not copulate 	I could not be copulating
you could not be copulating
she could not be copulating
we could not be copulating
you could not be copulating
they could not be copulating	I could not have copulated
you could not have copulated
she could not have copulated
we could not have copulated
you could not have copulated
they could not have copulated	I could not have been copulating
you could not have been copulating
she could not have been copulating
we could not have been copulating
you could not have been copulating
they could not have been copulating	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I copulate?
could you copulate?
could she copulate?
could we copulate?
could you copulate?
could they copulate? 	could I be copulating?
could you be copulating?
could she be copulating?
could we be copulating?
could you be copulating?
could they be copulating? 	could I have copulated?
could you have copulated?
could she have copulated?
could we have copulated?
could you have copulated?
could they have copulated? 	could I have been copulating?
could you have been copulating?
could she have been copulating?
could we have been copulating?
could you have been copulating?
could they have been copulating? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not copulate?
could you not copulate?
could she not copulate?
could we not copulate?
could you not copulate?
could they not copulate? 	could I not be copulating?
could you not be copulating?
could she not be copulating?
could we not be copulating?
could you not be copulating?
could they not be copulating? 	could I not have copulated?
could you not have copulated?
could she not have copulated?
could we not have copulated?
could you not have copulated?
could they not have copulated? 	could I not have been copulating?
could you not have been copulating?
could she not have been copulating?
could we not have been copulating?
could you not have been copulating?
could they not have been copulating?