could bang
Verbo regular: bang - banged- banged

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could bang
you could bang
she could bang
we could bang
you could bang
they could bang 	I could be banging
you could be banging
she could be banging
we could be banging
you could be banging
they could be banging	I could have banged
you could have banged
she could have banged
we could have banged
you could have banged
they could have banged	I could have been banging
you could have been banging
she could have been banging
we could have been banging
you could have been banging
they could have been banging	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I couldn't bang
you couldn't bang
she couldn't bang
we couldn't bang
you couldn't bang
they couldn't bang 	I couldn't be banging
you couldn't be banging
she couldn't be banging
we couldn't be banging
you couldn't be banging
they couldn't be banging	I couldn't have banged
you couldn't have banged
she couldn't have banged
we couldn't have banged
you couldn't have banged
they couldn't have banged	I couldn't have been banging
you couldn't have been banging
she couldn't have been banging
we couldn't have been banging
you couldn't have been banging
they couldn't have been banging	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I bang?
could you bang?
could she bang?
could we bang?
could you bang?
could they bang? 	could I be banging?
could you be banging?
could she be banging?
could we be banging?
could you be banging?
could they be banging? 	could I have banged?
could you have banged?
could she have banged?
could we have banged?
could you have banged?
could they have banged? 	could I have been banging?
could you have been banging?
could she have been banging?
could we have been banging?
could you have been banging?
could they have been banging? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
couldn't I bang?
couldn't you bang?
couldn't she bang?
couldn't we bang?
couldn't you bang?
couldn't they bang? 	couldn't I be banging?
couldn't you be banging?
couldn't she be banging?
couldn't we be banging?
couldn't you be banging?
couldn't they be banging? 	couldn't I have banged?
couldn't you have banged?
couldn't she have banged?
couldn't we have banged?
couldn't you have banged?
couldn't they have banged? 	couldn't I have been banging?
couldn't you have been banging?
couldn't she have been banging?
couldn't we have been banging?
couldn't you have been banging?
couldn't they have been banging?