could possess
Regular verb: possess - possessed- possessed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could possess
you could possess
she could possess
we could possess
you could possess
they could possess 	I could be possessing
you could be possessing
she could be possessing
we could be possessing
you could be possessing
they could be possessing	I could have possessed
you could have possessed
she could have possessed
we could have possessed
you could have possessed
they could have possessed	I could have been possessing
you could have been possessing
she could have been possessing
we could have been possessing
you could have been possessing
they could have been possessing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't possess
you couldn't possess
she couldn't possess
we couldn't possess
you couldn't possess
they couldn't possess 	I couldn't be possessing
you couldn't be possessing
she couldn't be possessing
we couldn't be possessing
you couldn't be possessing
they couldn't be possessing	I couldn't have possessed
you couldn't have possessed
she couldn't have possessed
we couldn't have possessed
you couldn't have possessed
they couldn't have possessed	I couldn't have been possessing
you couldn't have been possessing
she couldn't have been possessing
we couldn't have been possessing
you couldn't have been possessing
they couldn't have been possessing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I possess?
could you possess?
could she possess?
could we possess?
could you possess?
could they possess? 	could I be possessing?
could you be possessing?
could she be possessing?
could we be possessing?
could you be possessing?
could they be possessing? 	could I have possessed?
could you have possessed?
could she have possessed?
could we have possessed?
could you have possessed?
could they have possessed? 	could I have been possessing?
could you have been possessing?
could she have been possessing?
could we have been possessing?
could you have been possessing?
could they have been possessing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I possess?
couldn't you possess?
couldn't she possess?
couldn't we possess?
couldn't you possess?
couldn't they possess? 	couldn't I be possessing?
couldn't you be possessing?
couldn't she be possessing?
couldn't we be possessing?
couldn't you be possessing?
couldn't they be possessing? 	couldn't I have possessed?
couldn't you have possessed?
couldn't she have possessed?
couldn't we have possessed?
couldn't you have possessed?
couldn't they have possessed? 	couldn't I have been possessing?
couldn't you have been possessing?
couldn't she have been possessing?
couldn't we have been possessing?
couldn't you have been possessing?
couldn't they have been possessing?