could gradate
Verbo regular: gradate - gradated- gradated

Afirmación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could gradate
you could gradate
he could gradate
we could gradate
you could gradate
they could gradate 	I could be gradating
you could be gradating
he could be gradating
we could be gradating
you could be gradating
they could be gradating	I could have gradated
you could have gradated
he could have gradated
we could have gradated
you could have gradated
they could have gradated	I could have been gradating
you could have been gradating
he could have been gradating
we could have been gradating
you could have been gradating
they could have been gradating	

Negación 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
I could not gradate
you could not gradate
he could not gradate
we could not gradate
you could not gradate
they could not gradate 	I could not be gradating
you could not be gradating
he could not be gradating
we could not be gradating
you could not be gradating
they could not be gradating	I could not have gradated
you could not have gradated
he could not have gradated
we could not have gradated
you could not have gradated
they could not have gradated	I could not have been gradating
you could not have been gradating
he could not have been gradating
we could not have been gradating
you could not have been gradating
they could not have been gradating	

Forma interrogativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I gradate?
could you gradate?
could he gradate?
could we gradate?
could you gradate?
could they gradate? 	could I be gradating?
could you be gradating?
could he be gradating?
could we be gradating?
could you be gradating?
could they be gradating? 	could I have gradated?
could you have gradated?
could he have gradated?
could we have gradated?
could you have gradated?
could they have gradated? 	could I have been gradating?
could you have been gradating?
could he have been gradating?
could we have been gradating?
could you have been gradating?
could they have been gradating? 	

Forma interro-negativa 	
Forma simple 	Forma con V-ing 	Perfecto 	Perfecto con V-ing 	
could I not gradate?
could you not gradate?
could he not gradate?
could we not gradate?
could you not gradate?
could they not gradate? 	could I not be gradating?
could you not be gradating?
could he not be gradating?
could we not be gradating?
could you not be gradating?
could they not be gradating? 	could I not have gradated?
could you not have gradated?
could he not have gradated?
could we not have gradated?
could you not have gradated?
could they not have gradated? 	could I not have been gradating?
could you not have been gradating?
could he not have been gradating?
could we not have been gradating?
could you not have been gradating?
could they not have been gradating?