could fly-fish
Regular verb: fly-fish - fly-fished- fly-fished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could fly-fish
you could fly-fish
she could fly-fish
we could fly-fish
you could fly-fish
they could fly-fish 	I could be fly-fishing
you could be fly-fishing
she could be fly-fishing
we could be fly-fishing
you could be fly-fishing
they could be fly-fishing	I could have fly-fished
you could have fly-fished
she could have fly-fished
we could have fly-fished
you could have fly-fished
they could have fly-fished	I could have been fly-fishing
you could have been fly-fishing
she could have been fly-fishing
we could have been fly-fishing
you could have been fly-fishing
they could have been fly-fishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could not fly-fish
you could not fly-fish
she could not fly-fish
we could not fly-fish
you could not fly-fish
they could not fly-fish 	I could not be fly-fishing
you could not be fly-fishing
she could not be fly-fishing
we could not be fly-fishing
you could not be fly-fishing
they could not be fly-fishing	I could not have fly-fished
you could not have fly-fished
she could not have fly-fished
we could not have fly-fished
you could not have fly-fished
they could not have fly-fished	I could not have been fly-fishing
you could not have been fly-fishing
she could not have been fly-fishing
we could not have been fly-fishing
you could not have been fly-fishing
they could not have been fly-fishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I fly-fish?
could you fly-fish?
could she fly-fish?
could we fly-fish?
could you fly-fish?
could they fly-fish? 	could I be fly-fishing?
could you be fly-fishing?
could she be fly-fishing?
could we be fly-fishing?
could you be fly-fishing?
could they be fly-fishing? 	could I have fly-fished?
could you have fly-fished?
could she have fly-fished?
could we have fly-fished?
could you have fly-fished?
could they have fly-fished? 	could I have been fly-fishing?
could you have been fly-fishing?
could she have been fly-fishing?
could we have been fly-fishing?
could you have been fly-fishing?
could they have been fly-fishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I not fly-fish?
could you not fly-fish?
could she not fly-fish?
could we not fly-fish?
could you not fly-fish?
could they not fly-fish? 	could I not be fly-fishing?
could you not be fly-fishing?
could she not be fly-fishing?
could we not be fly-fishing?
could you not be fly-fishing?
could they not be fly-fishing? 	could I not have fly-fished?
could you not have fly-fished?
could she not have fly-fished?
could we not have fly-fished?
could you not have fly-fished?
could they not have fly-fished? 	could I not have been fly-fishing?
could you not have been fly-fishing?
could she not have been fly-fishing?
could we not have been fly-fishing?
could you not have been fly-fishing?
could they not have been fly-fishing?