could subculture
Regular verb: subculture - subcultured- subcultured

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could subculture
you could subculture
he could subculture
we could subculture
you could subculture
they could subculture 	I could be subculturing
you could be subculturing
he could be subculturing
we could be subculturing
you could be subculturing
they could be subculturing	I could have subcultured
you could have subcultured
he could have subcultured
we could have subcultured
you could have subcultured
they could have subcultured	I could have been subculturing
you could have been subculturing
he could have been subculturing
we could have been subculturing
you could have been subculturing
they could have been subculturing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't subculture
you couldn't subculture
he couldn't subculture
we couldn't subculture
you couldn't subculture
they couldn't subculture 	I couldn't be subculturing
you couldn't be subculturing
he couldn't be subculturing
we couldn't be subculturing
you couldn't be subculturing
they couldn't be subculturing	I couldn't have subcultured
you couldn't have subcultured
he couldn't have subcultured
we couldn't have subcultured
you couldn't have subcultured
they couldn't have subcultured	I couldn't have been subculturing
you couldn't have been subculturing
he couldn't have been subculturing
we couldn't have been subculturing
you couldn't have been subculturing
they couldn't have been subculturing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I subculture?
could you subculture?
could he subculture?
could we subculture?
could you subculture?
could they subculture? 	could I be subculturing?
could you be subculturing?
could he be subculturing?
could we be subculturing?
could you be subculturing?
could they be subculturing? 	could I have subcultured?
could you have subcultured?
could he have subcultured?
could we have subcultured?
could you have subcultured?
could they have subcultured? 	could I have been subculturing?
could you have been subculturing?
could he have been subculturing?
could we have been subculturing?
could you have been subculturing?
could they have been subculturing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I subculture?
couldn't you subculture?
couldn't he subculture?
couldn't we subculture?
couldn't you subculture?
couldn't they subculture? 	couldn't I be subculturing?
couldn't you be subculturing?
couldn't he be subculturing?
couldn't we be subculturing?
couldn't you be subculturing?
couldn't they be subculturing? 	couldn't I have subcultured?
couldn't you have subcultured?
couldn't he have subcultured?
couldn't we have subcultured?
couldn't you have subcultured?
couldn't they have subcultured? 	couldn't I have been subculturing?
couldn't you have been subculturing?
couldn't he have been subculturing?
couldn't we have been subculturing?
couldn't you have been subculturing?
couldn't they have been subculturing?