could visit
Regular verb: visit - visited- visited

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could visit
you could visit
he could visit
we could visit
you could visit
they could visit 	I could be visiting
you could be visiting
he could be visiting
we could be visiting
you could be visiting
they could be visiting	I could have visited
you could have visited
he could have visited
we could have visited
you could have visited
they could have visited	I could have been visiting
you could have been visiting
he could have been visiting
we could have been visiting
you could have been visiting
they could have been visiting	

Negation 	
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I couldn't visit
you couldn't visit
he couldn't visit
we couldn't visit
you couldn't visit
they couldn't visit 	I couldn't be visiting
you couldn't be visiting
he couldn't be visiting
we couldn't be visiting
you couldn't be visiting
they couldn't be visiting	I couldn't have visited
you couldn't have visited
he couldn't have visited
we couldn't have visited
you couldn't have visited
they couldn't have visited	I couldn't have been visiting
you couldn't have been visiting
he couldn't have been visiting
we couldn't have been visiting
you couldn't have been visiting
they couldn't have been visiting	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I visit?
could you visit?
could he visit?
could we visit?
could you visit?
could they visit? 	could I be visiting?
could you be visiting?
could he be visiting?
could we be visiting?
could you be visiting?
could they be visiting? 	could I have visited?
could you have visited?
could he have visited?
could we have visited?
could you have visited?
could they have visited? 	could I have been visiting?
could you have been visiting?
could he have been visiting?
could we have been visiting?
could you have been visiting?
could they have been visiting? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I visit?
couldn't you visit?
couldn't he visit?
couldn't we visit?
couldn't you visit?
couldn't they visit? 	couldn't I be visiting?
couldn't you be visiting?
couldn't he be visiting?
couldn't we be visiting?
couldn't you be visiting?
couldn't they be visiting? 	couldn't I have visited?
couldn't you have visited?
couldn't he have visited?
couldn't we have visited?
couldn't you have visited?
couldn't they have visited? 	couldn't I have been visiting?
couldn't you have been visiting?
couldn't he have been visiting?
couldn't we have been visiting?
couldn't you have been visiting?
couldn't they have been visiting?