could prune
Regular verb: prune - pruned- pruned

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could prune
you could prune
she could prune
we could prune
you could prune
they could prune 	I could be pruning
you could be pruning
she could be pruning
we could be pruning
you could be pruning
they could be pruning	I could have pruned
you could have pruned
she could have pruned
we could have pruned
you could have pruned
they could have pruned	I could have been pruning
you could have been pruning
she could have been pruning
we could have been pruning
you could have been pruning
they could have been pruning	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't prune
you couldn't prune
she couldn't prune
we couldn't prune
you couldn't prune
they couldn't prune 	I couldn't be pruning
you couldn't be pruning
she couldn't be pruning
we couldn't be pruning
you couldn't be pruning
they couldn't be pruning	I couldn't have pruned
you couldn't have pruned
she couldn't have pruned
we couldn't have pruned
you couldn't have pruned
they couldn't have pruned	I couldn't have been pruning
you couldn't have been pruning
she couldn't have been pruning
we couldn't have been pruning
you couldn't have been pruning
they couldn't have been pruning	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I prune?
could you prune?
could she prune?
could we prune?
could you prune?
could they prune? 	could I be pruning?
could you be pruning?
could she be pruning?
could we be pruning?
could you be pruning?
could they be pruning? 	could I have pruned?
could you have pruned?
could she have pruned?
could we have pruned?
could you have pruned?
could they have pruned? 	could I have been pruning?
could you have been pruning?
could she have been pruning?
could we have been pruning?
could you have been pruning?
could they have been pruning? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I prune?
couldn't you prune?
couldn't she prune?
couldn't we prune?
couldn't you prune?
couldn't they prune? 	couldn't I be pruning?
couldn't you be pruning?
couldn't she be pruning?
couldn't we be pruning?
couldn't you be pruning?
couldn't they be pruning? 	couldn't I have pruned?
couldn't you have pruned?
couldn't she have pruned?
couldn't we have pruned?
couldn't you have pruned?
couldn't they have pruned? 	couldn't I have been pruning?
couldn't you have been pruning?
couldn't she have been pruning?
couldn't we have been pruning?
couldn't you have been pruning?
couldn't they have been pruning?