could seed
Regular verb: seed - seeded- seeded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could seed
you could seed
he could seed
we could seed
you could seed
they could seed 	I could be seeding
you could be seeding
he could be seeding
we could be seeding
you could be seeding
they could be seeding	I could have seeded
you could have seeded
he could have seeded
we could have seeded
you could have seeded
they could have seeded	I could have been seeding
you could have been seeding
he could have been seeding
we could have been seeding
you could have been seeding
they could have been seeding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't seed
you couldn't seed
he couldn't seed
we couldn't seed
you couldn't seed
they couldn't seed 	I couldn't be seeding
you couldn't be seeding
he couldn't be seeding
we couldn't be seeding
you couldn't be seeding
they couldn't be seeding	I couldn't have seeded
you couldn't have seeded
he couldn't have seeded
we couldn't have seeded
you couldn't have seeded
they couldn't have seeded	I couldn't have been seeding
you couldn't have been seeding
he couldn't have been seeding
we couldn't have been seeding
you couldn't have been seeding
they couldn't have been seeding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I seed?
could you seed?
could he seed?
could we seed?
could you seed?
could they seed? 	could I be seeding?
could you be seeding?
could he be seeding?
could we be seeding?
could you be seeding?
could they be seeding? 	could I have seeded?
could you have seeded?
could he have seeded?
could we have seeded?
could you have seeded?
could they have seeded? 	could I have been seeding?
could you have been seeding?
could he have been seeding?
could we have been seeding?
could you have been seeding?
could they have been seeding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I seed?
couldn't you seed?
couldn't he seed?
couldn't we seed?
couldn't you seed?
couldn't they seed? 	couldn't I be seeding?
couldn't you be seeding?
couldn't he be seeding?
couldn't we be seeding?
couldn't you be seeding?
couldn't they be seeding? 	couldn't I have seeded?
couldn't you have seeded?
couldn't he have seeded?
couldn't we have seeded?
couldn't you have seeded?
couldn't they have seeded? 	couldn't I have been seeding?
couldn't you have been seeding?
couldn't he have been seeding?
couldn't we have been seeding?
couldn't you have been seeding?
couldn't they have been seeding?