I could discover you could discover she could discover we could discover you could discover they could discover
Forma con V-ing
I could be discovering you could be discovering she could be discovering we could be discovering you could be discovering they could be discovering
Perfecto
I could have discovered you could have discovered she could have discovered we could have discovered you could have discovered they could have discovered
Perfecto con V-ing
I could have been discovering you could have been discovering she could have been discovering we could have been discovering you could have been discovering they could have been discovering
Negación
Forma simple
I couldn't discover you couldn't discover she couldn't discover we couldn't discover you couldn't discover they couldn't discover
Forma con V-ing
I couldn't be discovering you couldn't be discovering she couldn't be discovering we couldn't be discovering you couldn't be discovering they couldn't be discovering
Perfecto
I couldn't have discovered you couldn't have discovered she couldn't have discovered we couldn't have discovered you couldn't have discovered they couldn't have discovered
Perfecto con V-ing
I couldn't have been discovering you couldn't have been discovering she couldn't have been discovering we couldn't have been discovering you couldn't have been discovering they couldn't have been discovering
Forma interrogativa
Forma simple
could I discover? could you discover? could she discover? could we discover? could you discover? could they discover?
Forma con V-ing
could I be discovering? could you be discovering? could she be discovering? could we be discovering? could you be discovering? could they be discovering?
Perfecto
could I have discovered? could you have discovered? could she have discovered? could we have discovered? could you have discovered? could they have discovered?
Perfecto con V-ing
could I have been discovering? could you have been discovering? could she have been discovering? could we have been discovering? could you have been discovering? could they have been discovering?
Forma interro-negativa
Forma simple
couldn't I discover? couldn't you discover? couldn't she discover? couldn't we discover? couldn't you discover? couldn't they discover?
Forma con V-ing
couldn't I be discovering? couldn't you be discovering? couldn't she be discovering? couldn't we be discovering? couldn't you be discovering? couldn't they be discovering?
Perfecto
couldn't I have discovered? couldn't you have discovered? couldn't she have discovered? couldn't we have discovered? couldn't you have discovered? couldn't they have discovered?
Perfecto con V-ing
couldn't I have been discovering? couldn't you have been discovering? couldn't she have been discovering? couldn't we have been discovering? couldn't you have been discovering? couldn't they have been discovering?