I could refine you could refine she could refine we could refine you could refine they could refine
Forma con V-ing
I could be refining you could be refining she could be refining we could be refining you could be refining they could be refining
Perfetto
I could have refined you could have refined she could have refined we could have refined you could have refined they could have refined
Perfetto con V-ing
I could have been refining you could have been refining she could have been refining we could have been refining you could have been refining they could have been refining
Negazione
Forma semplice
I could not refine you could not refine she could not refine we could not refine you could not refine they could not refine
Forma con V-ing
I could not be refining you could not be refining she could not be refining we could not be refining you could not be refining they could not be refining
Perfetto
I could not have refined you could not have refined she could not have refined we could not have refined you could not have refined they could not have refined
Perfetto con V-ing
I could not have been refining you could not have been refining she could not have been refining we could not have been refining you could not have been refining they could not have been refining
Forma interrogativa
Forma semplice
could I refine? could you refine? could she refine? could we refine? could you refine? could they refine?
Forma con V-ing
could I be refining? could you be refining? could she be refining? could we be refining? could you be refining? could they be refining?
Perfetto
could I have refined? could you have refined? could she have refined? could we have refined? could you have refined? could they have refined?
Perfetto con V-ing
could I have been refining? could you have been refining? could she have been refining? could we have been refining? could you have been refining? could they have been refining?
Forma interro-negativa
Forma semplice
could I not refine? could you not refine? could she not refine? could we not refine? could you not refine? could they not refine?
Forma con V-ing
could I not be refining? could you not be refining? could she not be refining? could we not be refining? could you not be refining? could they not be refining?
Perfetto
could I not have refined? could you not have refined? could she not have refined? could we not have refined? could you not have refined? could they not have refined?
Perfetto con V-ing
could I not have been refining? could you not have been refining? could she not have been refining? could we not have been refining? could you not have been refining? could they not have been refining?