could retrograde
Verbo regolare: retrograde - retrograded- retrograded

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could retrograde
you could retrograde
he could retrograde
we could retrograde
you could retrograde
they could retrograde 	I could be retrograding
you could be retrograding
he could be retrograding
we could be retrograding
you could be retrograding
they could be retrograding	I could have retrograded
you could have retrograded
he could have retrograded
we could have retrograded
you could have retrograded
they could have retrograded	I could have been retrograding
you could have been retrograding
he could have been retrograding
we could have been retrograding
you could have been retrograding
they could have been retrograding	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I couldn't retrograde
you couldn't retrograde
he couldn't retrograde
we couldn't retrograde
you couldn't retrograde
they couldn't retrograde 	I couldn't be retrograding
you couldn't be retrograding
he couldn't be retrograding
we couldn't be retrograding
you couldn't be retrograding
they couldn't be retrograding	I couldn't have retrograded
you couldn't have retrograded
he couldn't have retrograded
we couldn't have retrograded
you couldn't have retrograded
they couldn't have retrograded	I couldn't have been retrograding
you couldn't have been retrograding
he couldn't have been retrograding
we couldn't have been retrograding
you couldn't have been retrograding
they couldn't have been retrograding	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I retrograde?
could you retrograde?
could he retrograde?
could we retrograde?
could you retrograde?
could they retrograde? 	could I be retrograding?
could you be retrograding?
could he be retrograding?
could we be retrograding?
could you be retrograding?
could they be retrograding? 	could I have retrograded?
could you have retrograded?
could he have retrograded?
could we have retrograded?
could you have retrograded?
could they have retrograded? 	could I have been retrograding?
could you have been retrograding?
could he have been retrograding?
could we have been retrograding?
could you have been retrograding?
could they have been retrograding? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
couldn't I retrograde?
couldn't you retrograde?
couldn't he retrograde?
couldn't we retrograde?
couldn't you retrograde?
couldn't they retrograde? 	couldn't I be retrograding?
couldn't you be retrograding?
couldn't he be retrograding?
couldn't we be retrograding?
couldn't you be retrograding?
couldn't they be retrograding? 	couldn't I have retrograded?
couldn't you have retrograded?
couldn't he have retrograded?
couldn't we have retrograded?
couldn't you have retrograded?
couldn't they have retrograded? 	couldn't I have been retrograding?
couldn't you have been retrograding?
couldn't he have been retrograding?
couldn't we have been retrograding?
couldn't you have been retrograding?
couldn't they have been retrograding?