could graduate
Verbo regular: graduate - graduated- graduated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could graduate
you could graduate
he could graduate
we could graduate
you could graduate
they could graduate 	I could be graduating
you could be graduating
he could be graduating
we could be graduating
you could be graduating
they could be graduating	I could have graduated
you could have graduated
he could have graduated
we could have graduated
you could have graduated
they could have graduated	I could have been graduating
you could have been graduating
he could have been graduating
we could have been graduating
you could have been graduating
they could have been graduating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not graduate
you could not graduate
he could not graduate
we could not graduate
you could not graduate
they could not graduate 	I could not be graduating
you could not be graduating
he could not be graduating
we could not be graduating
you could not be graduating
they could not be graduating	I could not have graduated
you could not have graduated
he could not have graduated
we could not have graduated
you could not have graduated
they could not have graduated	I could not have been graduating
you could not have been graduating
he could not have been graduating
we could not have been graduating
you could not have been graduating
they could not have been graduating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I graduate?
could you graduate?
could he graduate?
could we graduate?
could you graduate?
could they graduate? 	could I be graduating?
could you be graduating?
could he be graduating?
could we be graduating?
could you be graduating?
could they be graduating? 	could I have graduated?
could you have graduated?
could he have graduated?
could we have graduated?
could you have graduated?
could they have graduated? 	could I have been graduating?
could you have been graduating?
could he have been graduating?
could we have been graduating?
could you have been graduating?
could they have been graduating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not graduate?
could you not graduate?
could he not graduate?
could we not graduate?
could you not graduate?
could they not graduate? 	could I not be graduating?
could you not be graduating?
could he not be graduating?
could we not be graduating?
could you not be graduating?
could they not be graduating? 	could I not have graduated?
could you not have graduated?
could he not have graduated?
could we not have graduated?
could you not have graduated?
could they not have graduated? 	could I not have been graduating?
could you not have been graduating?
could he not have been graduating?
could we not have been graduating?
could you not have been graduating?
could they not have been graduating?