I could forefend you could forefend he could forefend we could forefend you could forefend they could forefend
Forma con V-ing
I could be forefending you could be forefending he could be forefending we could be forefending you could be forefending they could be forefending
Perfecto
I could have forefended you could have forefended he could have forefended we could have forefended you could have forefended they could have forefended
Perfecto con V-ing
I could have been forefending you could have been forefending he could have been forefending we could have been forefending you could have been forefending they could have been forefending
Negación
Forma simple
I could not forefend you could not forefend he could not forefend we could not forefend you could not forefend they could not forefend
Forma con V-ing
I could not be forefending you could not be forefending he could not be forefending we could not be forefending you could not be forefending they could not be forefending
Perfecto
I could not have forefended you could not have forefended he could not have forefended we could not have forefended you could not have forefended they could not have forefended
Perfecto con V-ing
I could not have been forefending you could not have been forefending he could not have been forefending we could not have been forefending you could not have been forefending they could not have been forefending
Forma interrogativa
Forma simple
could I forefend? could you forefend? could he forefend? could we forefend? could you forefend? could they forefend?
Forma con V-ing
could I be forefending? could you be forefending? could he be forefending? could we be forefending? could you be forefending? could they be forefending?
Perfecto
could I have forefended? could you have forefended? could he have forefended? could we have forefended? could you have forefended? could they have forefended?
Perfecto con V-ing
could I have been forefending? could you have been forefending? could he have been forefending? could we have been forefending? could you have been forefending? could they have been forefending?
Forma interro-negativa
Forma simple
could I not forefend? could you not forefend? could he not forefend? could we not forefend? could you not forefend? could they not forefend?
Forma con V-ing
could I not be forefending? could you not be forefending? could he not be forefending? could we not be forefending? could you not be forefending? could they not be forefending?
Perfecto
could I not have forefended? could you not have forefended? could he not have forefended? could we not have forefended? could you not have forefended? could they not have forefended?
Perfecto con V-ing
could I not have been forefending? could you not have been forefending? could he not have been forefending? could we not have been forefending? could you not have been forefending? could they not have been forefending?