could cram
Verbo regular: cram - crammed- crammed

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could cram
you could cram
he could cram
we could cram
you could cram
they could cram 	I could be cramming
you could be cramming
he could be cramming
we could be cramming
you could be cramming
they could be cramming	I could have crammed
you could have crammed
he could have crammed
we could have crammed
you could have crammed
they could have crammed	I could have been cramming
you could have been cramming
he could have been cramming
we could have been cramming
you could have been cramming
they could have been cramming	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not cram
you could not cram
he could not cram
we could not cram
you could not cram
they could not cram 	I could not be cramming
you could not be cramming
he could not be cramming
we could not be cramming
you could not be cramming
they could not be cramming	I could not have crammed
you could not have crammed
he could not have crammed
we could not have crammed
you could not have crammed
they could not have crammed	I could not have been cramming
you could not have been cramming
he could not have been cramming
we could not have been cramming
you could not have been cramming
they could not have been cramming	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I cram?
could you cram?
could he cram?
could we cram?
could you cram?
could they cram? 	could I be cramming?
could you be cramming?
could he be cramming?
could we be cramming?
could you be cramming?
could they be cramming? 	could I have crammed?
could you have crammed?
could he have crammed?
could we have crammed?
could you have crammed?
could they have crammed? 	could I have been cramming?
could you have been cramming?
could he have been cramming?
could we have been cramming?
could you have been cramming?
could they have been cramming? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not cram?
could you not cram?
could he not cram?
could we not cram?
could you not cram?
could they not cram? 	could I not be cramming?
could you not be cramming?
could he not be cramming?
could we not be cramming?
could you not be cramming?
could they not be cramming? 	could I not have crammed?
could you not have crammed?
could he not have crammed?
could we not have crammed?
could you not have crammed?
could they not have crammed? 	could I not have been cramming?
could you not have been cramming?
could he not have been cramming?
could we not have been cramming?
could you not have been cramming?
could they not have been cramming?