I could append you could append she could append we could append you could append they could append
Forma con V-ing
I could be appending you could be appending she could be appending we could be appending you could be appending they could be appending
Perfecto
I could have appended you could have appended she could have appended we could have appended you could have appended they could have appended
Perfecto con V-ing
I could have been appending you could have been appending she could have been appending we could have been appending you could have been appending they could have been appending
Negación
Forma simple
I could not append you could not append she could not append we could not append you could not append they could not append
Forma con V-ing
I could not be appending you could not be appending she could not be appending we could not be appending you could not be appending they could not be appending
Perfecto
I could not have appended you could not have appended she could not have appended we could not have appended you could not have appended they could not have appended
Perfecto con V-ing
I could not have been appending you could not have been appending she could not have been appending we could not have been appending you could not have been appending they could not have been appending
Forma interrogativa
Forma simple
could I append? could you append? could she append? could we append? could you append? could they append?
Forma con V-ing
could I be appending? could you be appending? could she be appending? could we be appending? could you be appending? could they be appending?
Perfecto
could I have appended? could you have appended? could she have appended? could we have appended? could you have appended? could they have appended?
Perfecto con V-ing
could I have been appending? could you have been appending? could she have been appending? could we have been appending? could you have been appending? could they have been appending?
Forma interro-negativa
Forma simple
could I not append? could you not append? could she not append? could we not append? could you not append? could they not append?
Forma con V-ing
could I not be appending? could you not be appending? could she not be appending? could we not be appending? could you not be appending? could they not be appending?
Perfecto
could I not have appended? could you not have appended? could she not have appended? could we not have appended? could you not have appended? could they not have appended?
Perfecto con V-ing
could I not have been appending? could you not have been appending? could she not have been appending? could we not have been appending? could you not have been appending? could they not have been appending?