I could warn you could warn he could warn we could warn you could warn they could warn
Forma con V-ing
I could be warning you could be warning he could be warning we could be warning you could be warning they could be warning
Perfetto
I could have warned you could have warned he could have warned we could have warned you could have warned they could have warned
Perfetto con V-ing
I could have been warning you could have been warning he could have been warning we could have been warning you could have been warning they could have been warning
Negazione
Forma semplice
I could not warn you could not warn he could not warn we could not warn you could not warn they could not warn
Forma con V-ing
I could not be warning you could not be warning he could not be warning we could not be warning you could not be warning they could not be warning
Perfetto
I could not have warned you could not have warned he could not have warned we could not have warned you could not have warned they could not have warned
Perfetto con V-ing
I could not have been warning you could not have been warning he could not have been warning we could not have been warning you could not have been warning they could not have been warning
Forma interrogativa
Forma semplice
could I warn? could you warn? could he warn? could we warn? could you warn? could they warn?
Forma con V-ing
could I be warning? could you be warning? could he be warning? could we be warning? could you be warning? could they be warning?
Perfetto
could I have warned? could you have warned? could he have warned? could we have warned? could you have warned? could they have warned?
Perfetto con V-ing
could I have been warning? could you have been warning? could he have been warning? could we have been warning? could you have been warning? could they have been warning?
Forma interro-negativa
Forma semplice
could I not warn? could you not warn? could he not warn? could we not warn? could you not warn? could they not warn?
Forma con V-ing
could I not be warning? could you not be warning? could he not be warning? could we not be warning? could you not be warning? could they not be warning?
Perfetto
could I not have warned? could you not have warned? could he not have warned? could we not have warned? could you not have warned? could they not have warned?
Perfetto con V-ing
could I not have been warning? could you not have been warning? could he not have been warning? could we not have been warning? could you not have been warning? could they not have been warning?