I could try you could try he could try we could try you could try they could try
Forma con V-ing
I could be trying you could be trying he could be trying we could be trying you could be trying they could be trying
Perfetto
I could have tried you could have tried he could have tried we could have tried you could have tried they could have tried
Perfetto con V-ing
I could have been trying you could have been trying he could have been trying we could have been trying you could have been trying they could have been trying
Negazione
Forma semplice
I could not try you could not try he could not try we could not try you could not try they could not try
Forma con V-ing
I could not be trying you could not be trying he could not be trying we could not be trying you could not be trying they could not be trying
Perfetto
I could not have tried you could not have tried he could not have tried we could not have tried you could not have tried they could not have tried
Perfetto con V-ing
I could not have been trying you could not have been trying he could not have been trying we could not have been trying you could not have been trying they could not have been trying
Forma interrogativa
Forma semplice
could I try? could you try? could he try? could we try? could you try? could they try?
Forma con V-ing
could I be trying? could you be trying? could he be trying? could we be trying? could you be trying? could they be trying?
Perfetto
could I have tried? could you have tried? could he have tried? could we have tried? could you have tried? could they have tried?
Perfetto con V-ing
could I have been trying? could you have been trying? could he have been trying? could we have been trying? could you have been trying? could they have been trying?
Forma interro-negativa
Forma semplice
could I not try? could you not try? could he not try? could we not try? could you not try? could they not try?
Forma con V-ing
could I not be trying? could you not be trying? could he not be trying? could we not be trying? could you not be trying? could they not be trying?
Perfetto
could I not have tried? could you not have tried? could he not have tried? could we not have tried? could you not have tried? could they not have tried?
Perfetto con V-ing
could I not have been trying? could you not have been trying? could he not have been trying? could we not have been trying? could you not have been trying? could they not have been trying?