could tube-feed
Regular verb: tube-feed - tube-feeded- tube-feeded

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could tube-feed
you could tube-feed
he could tube-feed
we could tube-feed
you could tube-feed
they could tube-feed 	I could be tube-feeding
you could be tube-feeding
he could be tube-feeding
we could be tube-feeding
you could be tube-feeding
they could be tube-feeding	I could have tube-feeded
you could have tube-feeded
he could have tube-feeded
we could have tube-feeded
you could have tube-feeded
they could have tube-feeded	I could have been tube-feeding
you could have been tube-feeding
he could have been tube-feeding
we could have been tube-feeding
you could have been tube-feeding
they could have been tube-feeding	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't tube-feed
you couldn't tube-feed
he couldn't tube-feed
we couldn't tube-feed
you couldn't tube-feed
they couldn't tube-feed 	I couldn't be tube-feeding
you couldn't be tube-feeding
he couldn't be tube-feeding
we couldn't be tube-feeding
you couldn't be tube-feeding
they couldn't be tube-feeding	I couldn't have tube-feeded
you couldn't have tube-feeded
he couldn't have tube-feeded
we couldn't have tube-feeded
you couldn't have tube-feeded
they couldn't have tube-feeded	I couldn't have been tube-feeding
you couldn't have been tube-feeding
he couldn't have been tube-feeding
we couldn't have been tube-feeding
you couldn't have been tube-feeding
they couldn't have been tube-feeding	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I tube-feed?
could you tube-feed?
could he tube-feed?
could we tube-feed?
could you tube-feed?
could they tube-feed? 	could I be tube-feeding?
could you be tube-feeding?
could he be tube-feeding?
could we be tube-feeding?
could you be tube-feeding?
could they be tube-feeding? 	could I have tube-feeded?
could you have tube-feeded?
could he have tube-feeded?
could we have tube-feeded?
could you have tube-feeded?
could they have tube-feeded? 	could I have been tube-feeding?
could you have been tube-feeding?
could he have been tube-feeding?
could we have been tube-feeding?
could you have been tube-feeding?
could they have been tube-feeding? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I tube-feed?
couldn't you tube-feed?
couldn't he tube-feed?
couldn't we tube-feed?
couldn't you tube-feed?
couldn't they tube-feed? 	couldn't I be tube-feeding?
couldn't you be tube-feeding?
couldn't he be tube-feeding?
couldn't we be tube-feeding?
couldn't you be tube-feeding?
couldn't they be tube-feeding? 	couldn't I have tube-feeded?
couldn't you have tube-feeded?
couldn't he have tube-feeded?
couldn't we have tube-feeded?
couldn't you have tube-feeded?
couldn't they have tube-feeded? 	couldn't I have been tube-feeding?
couldn't you have been tube-feeding?
couldn't he have been tube-feeding?
couldn't we have been tube-feeding?
couldn't you have been tube-feeding?
couldn't they have been tube-feeding?