could catch
Irregular verb: catch - caught- caught

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I could catch
you could catch
he could catch
we could catch
you could catch
they could catch 	I could be catching
you could be catching
he could be catching
we could be catching
you could be catching
they could be catching	I could have caught
you could have caught
he could have caught
we could have caught
you could have caught
they could have caught	I could have been catching
you could have been catching
he could have been catching
we could have been catching
you could have been catching
they could have been catching	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I couldn't catch
you couldn't catch
he couldn't catch
we couldn't catch
you couldn't catch
they couldn't catch 	I couldn't be catching
you couldn't be catching
he couldn't be catching
we couldn't be catching
you couldn't be catching
they couldn't be catching	I couldn't have caught
you couldn't have caught
he couldn't have caught
we couldn't have caught
you couldn't have caught
they couldn't have caught	I couldn't have been catching
you couldn't have been catching
he couldn't have been catching
we couldn't have been catching
you couldn't have been catching
they couldn't have been catching	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
could I catch?
could you catch?
could he catch?
could we catch?
could you catch?
could they catch? 	could I be catching?
could you be catching?
could he be catching?
could we be catching?
could you be catching?
could they be catching? 	could I have caught?
could you have caught?
could he have caught?
could we have caught?
could you have caught?
could they have caught? 	could I have been catching?
could you have been catching?
could he have been catching?
could we have been catching?
could you have been catching?
could they have been catching? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
couldn't I catch?
couldn't you catch?
couldn't he catch?
couldn't we catch?
couldn't you catch?
couldn't they catch? 	couldn't I be catching?
couldn't you be catching?
couldn't he be catching?
couldn't we be catching?
couldn't you be catching?
couldn't they be catching? 	couldn't I have caught?
couldn't you have caught?
couldn't he have caught?
couldn't we have caught?
couldn't you have caught?
couldn't they have caught? 	couldn't I have been catching?
couldn't you have been catching?
couldn't he have been catching?
couldn't we have been catching?
couldn't you have been catching?
couldn't they have been catching?