could prealter
Verbo regolare: prealter - prealtered- prealtered

Affermazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could prealter
you could prealter
she could prealter
we could prealter
you could prealter
they could prealter 	I could be prealtering
you could be prealtering
she could be prealtering
we could be prealtering
you could be prealtering
they could be prealtering	I could have prealtered
you could have prealtered
she could have prealtered
we could have prealtered
you could have prealtered
they could have prealtered	I could have been prealtering
you could have been prealtering
she could have been prealtering
we could have been prealtering
you could have been prealtering
they could have been prealtering	

Negazione 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
I could not prealter
you could not prealter
she could not prealter
we could not prealter
you could not prealter
they could not prealter 	I could not be prealtering
you could not be prealtering
she could not be prealtering
we could not be prealtering
you could not be prealtering
they could not be prealtering	I could not have prealtered
you could not have prealtered
she could not have prealtered
we could not have prealtered
you could not have prealtered
they could not have prealtered	I could not have been prealtering
you could not have been prealtering
she could not have been prealtering
we could not have been prealtering
you could not have been prealtering
they could not have been prealtering	

Forma interrogativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I prealter?
could you prealter?
could she prealter?
could we prealter?
could you prealter?
could they prealter? 	could I be prealtering?
could you be prealtering?
could she be prealtering?
could we be prealtering?
could you be prealtering?
could they be prealtering? 	could I have prealtered?
could you have prealtered?
could she have prealtered?
could we have prealtered?
could you have prealtered?
could they have prealtered? 	could I have been prealtering?
could you have been prealtering?
could she have been prealtering?
could we have been prealtering?
could you have been prealtering?
could they have been prealtering? 	

Forma interro-negativa 	
Forma semplice 	Forma con V-ing 	Perfetto 	Perfetto con V-ing 	
could I not prealter?
could you not prealter?
could she not prealter?
could we not prealter?
could you not prealter?
could they not prealter? 	could I not be prealtering?
could you not be prealtering?
could she not be prealtering?
could we not be prealtering?
could you not be prealtering?
could they not be prealtering? 	could I not have prealtered?
could you not have prealtered?
could she not have prealtered?
could we not have prealtered?
could you not have prealtered?
could they not have prealtered? 	could I not have been prealtering?
could you not have been prealtering?
could she not have been prealtering?
could we not have been prealtering?
could you not have been prealtering?
could they not have been prealtering?