I could itch you could itch she could itch we could itch you could itch they could itch
Forma con V-ing
I could be itching you could be itching she could be itching we could be itching you could be itching they could be itching
Perfecto
I could have itched you could have itched she could have itched we could have itched you could have itched they could have itched
Perfecto con V-ing
I could have been itching you could have been itching she could have been itching we could have been itching you could have been itching they could have been itching
Negación
Forma simple
I could not itch you could not itch she could not itch we could not itch you could not itch they could not itch
Forma con V-ing
I could not be itching you could not be itching she could not be itching we could not be itching you could not be itching they could not be itching
Perfecto
I could not have itched you could not have itched she could not have itched we could not have itched you could not have itched they could not have itched
Perfecto con V-ing
I could not have been itching you could not have been itching she could not have been itching we could not have been itching you could not have been itching they could not have been itching
Forma interrogativa
Forma simple
could I itch? could you itch? could she itch? could we itch? could you itch? could they itch?
Forma con V-ing
could I be itching? could you be itching? could she be itching? could we be itching? could you be itching? could they be itching?
Perfecto
could I have itched? could you have itched? could she have itched? could we have itched? could you have itched? could they have itched?
Perfecto con V-ing
could I have been itching? could you have been itching? could she have been itching? could we have been itching? could you have been itching? could they have been itching?
Forma interro-negativa
Forma simple
could I not itch? could you not itch? could she not itch? could we not itch? could you not itch? could they not itch?
Forma con V-ing
could I not be itching? could you not be itching? could she not be itching? could we not be itching? could you not be itching? could they not be itching?
Perfecto
could I not have itched? could you not have itched? could she not have itched? could we not have itched? could you not have itched? could they not have itched?
Perfecto con V-ing
could I not have been itching? could you not have been itching? could she not have been itching? could we not have been itching? could you not have been itching? could they not have been itching?