can fish
Regular verb: fish - fished- fished

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can fish
you can fish
he can fish
we can fish
you can fish
they can fish 	I can be fishing
you can be fishing
he can be fishing
we can be fishing
you can be fishing
they can be fishing	I can have fished
you can have fished
he can have fished
we can have fished
you can have fished
they can have fished	I can have been fishing
you can have been fishing
he can have been fishing
we can have been fishing
you can have been fishing
they can have been fishing	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't fish
you can't fish
he can't fish
we can't fish
you can't fish
they can't fish 	I can't be fishing
you can't be fishing
he can't be fishing
we can't be fishing
you can't be fishing
they can't be fishing	I can't have fished
you can't have fished
he can't have fished
we can't have fished
you can't have fished
they can't have fished	I can't have been fishing
you can't have been fishing
he can't have been fishing
we can't have been fishing
you can't have been fishing
they can't have been fishing	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I fish?
can you fish?
can he fish?
can we fish?
can you fish?
can they fish? 	can I be fishing?
can you be fishing?
can he be fishing?
can we be fishing?
can you be fishing?
can they be fishing? 	can I have fished?
can you have fished?
can he have fished?
can we have fished?
can you have fished?
can they have fished? 	can I have been fishing?
can you have been fishing?
can he have been fishing?
can we have been fishing?
can you have been fishing?
can they have been fishing? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I fish?
can't you fish?
can't he fish?
can't we fish?
can't you fish?
can't they fish? 	can't I be fishing?
can't you be fishing?
can't he be fishing?
can't we be fishing?
can't you be fishing?
can't they be fishing? 	can't I have fished?
can't you have fished?
can't he have fished?
can't we have fished?
can't you have fished?
can't they have fished? 	can't I have been fishing?
can't you have been fishing?
can't he have been fishing?
can't we have been fishing?
can't you have been fishing?
can't they have been fishing?