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 couldn't frequent
you couldn't frequent
he couldn't frequent
we couldn't frequent
you couldn't frequent
they couldn't frequent 	I couldn't be frequenting
you couldn't be frequenting
he couldn't be frequenting
we couldn't be frequenting
you couldn't be frequenting
they couldn't be frequenting	I couldn't have frequented
you couldn't have frequented
he couldn't have frequented
we couldn't have frequented
you couldn't have frequented
they couldn't have frequented	I couldn't have been frequenting
you couldn't have been frequenting
he couldn't have been frequenting
we couldn't have been frequenting
you couldn't have been frequenting
they couldn't 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 	
couldn't I frequent?
couldn't you frequent?
couldn't he frequent?
couldn't we frequent?
couldn't you frequent?
couldn't they frequent? 	couldn't I be frequenting?
couldn't you be frequenting?
couldn't he be frequenting?
couldn't we be frequenting?
couldn't you be frequenting?
couldn't they be frequenting? 	couldn't I have frequented?
couldn't you have frequented?
couldn't he have frequented?
couldn't we have frequented?
couldn't you have frequented?
couldn't they have frequented? 	couldn't I have been frequenting?
couldn't you have been frequenting?
couldn't he have been frequenting?
couldn't we have been frequenting?
couldn't you have been frequenting?
couldn't they have been frequenting?