could film
Regular verb: film - filmed- filmed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could film
you could film
she could film
we could film
you could film
they could film 	I could be filming
you could be filming
she could be filming
we could be filming
you could be filming
they could be filming	I could have filmed
you could have filmed
she could have filmed
we could have filmed
you could have filmed
they could have filmed	I could have been filming
you could have been filming
she could have been filming
we could have been filming
you could have been filming
they could have been filming	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't film
you couldn't film
she couldn't film
we couldn't film
you couldn't film
they couldn't film 	I couldn't be filming
you couldn't be filming
she couldn't be filming
we couldn't be filming
you couldn't be filming
they couldn't be filming	I couldn't have filmed
you couldn't have filmed
she couldn't have filmed
we couldn't have filmed
you couldn't have filmed
they couldn't have filmed	I couldn't have been filming
you couldn't have been filming
she couldn't have been filming
we couldn't have been filming
you couldn't have been filming
they couldn't have been filming	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I film?
could you film?
could she film?
could we film?
could you film?
could they film? 	could I be filming?
could you be filming?
could she be filming?
could we be filming?
could you be filming?
could they be filming? 	could I have filmed?
could you have filmed?
could she have filmed?
could we have filmed?
could you have filmed?
could they have filmed? 	could I have been filming?
could you have been filming?
could she have been filming?
could we have been filming?
could you have been filming?
could they have been filming? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I film?
couldn't you film?
couldn't she film?
couldn't we film?
couldn't you film?
couldn't they film? 	couldn't I be filming?
couldn't you be filming?
couldn't she be filming?
couldn't we be filming?
couldn't you be filming?
couldn't they be filming? 	couldn't I have filmed?
couldn't you have filmed?
couldn't she have filmed?
couldn't we have filmed?
couldn't you have filmed?
couldn't they have filmed? 	couldn't I have been filming?
couldn't you have been filming?
couldn't she have been filming?
couldn't we have been filming?
couldn't you have been filming?
couldn't they have been filming?