I could append you could append he could append we could append you could append they could append
Forma con V-ing
I could be appending you could be appending he could be appending we could be appending you could be appending they could be appending
Perfecto
I could have appended you could have appended he 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 he could have been appending we could have been appending you could have been appending they could have been appending
Negación
Forma simple
I couldn't append you couldn't append he couldn't append we couldn't append you couldn't append they couldn't append
Forma con V-ing
I couldn't be appending you couldn't be appending he couldn't be appending we couldn't be appending you couldn't be appending they couldn't be appending
Perfecto
I couldn't have appended you couldn't have appended he couldn't have appended we couldn't have appended you couldn't have appended they couldn't have appended
Perfecto con V-ing
I couldn't have been appending you couldn't have been appending he couldn't have been appending we couldn't have been appending you couldn't have been appending they couldn't have been appending
Forma interrogativa
Forma simple
could I append? could you append? could he append? could we append? could you append? could they append?
Forma con V-ing
could I be appending? could you be appending? could he be appending? could we be appending? could you be appending? could they be appending?
Perfecto
could I have appended? could you have appended? could he 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 he have been appending? could we have been appending? could you have been appending? could they have been appending?
Forma interro-negativa
Forma simple
couldn't I append? couldn't you append? couldn't he append? couldn't we append? couldn't you append? couldn't they append?
Forma con V-ing
couldn't I be appending? couldn't you be appending? couldn't he be appending? couldn't we be appending? couldn't you be appending? couldn't they be appending?
Perfecto
couldn't I have appended? couldn't you have appended? couldn't he have appended? couldn't we have appended? couldn't you have appended? couldn't they have appended?
Perfecto con V-ing
couldn't I have been appending? couldn't you have been appending? couldn't he have been appending? couldn't we have been appending? couldn't you have been appending? couldn't they have been appending?