could orb
Regular verb: orb - orbed- orbed

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could orb
you could orb
he could orb
we could orb
you could orb
they could orb 	I could be orbing
you could be orbing
he could be orbing
we could be orbing
you could be orbing
they could be orbing	I could have orbed
you could have orbed
he could have orbed
we could have orbed
you could have orbed
they could have orbed	I could have been orbing
you could have been orbing
he could have been orbing
we could have been orbing
you could have been orbing
they could have been orbing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't orb
you couldn't orb
he couldn't orb
we couldn't orb
you couldn't orb
they couldn't orb 	I couldn't be orbing
you couldn't be orbing
he couldn't be orbing
we couldn't be orbing
you couldn't be orbing
they couldn't be orbing	I couldn't have orbed
you couldn't have orbed
he couldn't have orbed
we couldn't have orbed
you couldn't have orbed
they couldn't have orbed	I couldn't have been orbing
you couldn't have been orbing
he couldn't have been orbing
we couldn't have been orbing
you couldn't have been orbing
they couldn't have been orbing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I orb?
could you orb?
could he orb?
could we orb?
could you orb?
could they orb? 	could I be orbing?
could you be orbing?
could he be orbing?
could we be orbing?
could you be orbing?
could they be orbing? 	could I have orbed?
could you have orbed?
could he have orbed?
could we have orbed?
could you have orbed?
could they have orbed? 	could I have been orbing?
could you have been orbing?
could he have been orbing?
could we have been orbing?
could you have been orbing?
could they have been orbing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I orb?
couldn't you orb?
couldn't he orb?
couldn't we orb?
couldn't you orb?
couldn't they orb? 	couldn't I be orbing?
couldn't you be orbing?
couldn't he be orbing?
couldn't we be orbing?
couldn't you be orbing?
couldn't they be orbing? 	couldn't I have orbed?
couldn't you have orbed?
couldn't he have orbed?
couldn't we have orbed?
couldn't you have orbed?
couldn't they have orbed? 	couldn't I have been orbing?
couldn't you have been orbing?
couldn't he have been orbing?
couldn't we have been orbing?
couldn't you have been orbing?
couldn't they have been orbing?