could frequent
Regular verb: frequent - frequented- frequented

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could frequent
you could frequent
he could frequent
we could frequent
you could frequent
they could frequent 	I could be frequenting
you could be frequenting
he could be frequenting
we could be frequenting
you could be frequenting
they could be frequenting	I could have frequented
you could have frequented
he could have frequented
we could have frequented
you could have frequented
they could have frequented	I could have been frequenting
you could have been frequenting
he could have been frequenting
we could have been frequenting
you could have been frequenting
they could have been frequenting	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not frequent
you could not frequent
he could not frequent
we could not frequent
you could not frequent
they could not frequent 	I could not be frequenting
you could not be frequenting
he could not be frequenting
we could not be frequenting
you could not be frequenting
they could not be frequenting	I could not have frequented
you could not have frequented
he could not have frequented
we could not have frequented
you could not have frequented
they could not have frequented	I could not have been frequenting
you could not have been frequenting
he could not have been frequenting
we could not have been frequenting
you could not have been frequenting
they could not have been frequenting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I frequent?
could you frequent?
could he frequent?
could we frequent?
could you frequent?
could they frequent? 	could I be frequenting?
could you be frequenting?
could he be frequenting?
could we be frequenting?
could you be frequenting?
could they be frequenting? 	could I have frequented?
could you have frequented?
could he have frequented?
could we have frequented?
could you have frequented?
could they have frequented? 	could I have been frequenting?
could you have been frequenting?
could he have been frequenting?
could we have been frequenting?
could you have been frequenting?
could they have been frequenting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not frequent?
could you not frequent?
could he not frequent?
could we not frequent?
could you not frequent?
could they not frequent? 	could I not be frequenting?
could you not be frequenting?
could he not be frequenting?
could we not be frequenting?
could you not be frequenting?
could they not be frequenting? 	could I not have frequented?
could you not have frequented?
could he not have frequented?
could we not have frequented?
could you not have frequented?
could they not have frequented? 	could I not have been frequenting?
could you not have been frequenting?
could he not have been frequenting?
could we not have been frequenting?
could you not have been frequenting?
could they not have been frequenting?