Conjugación del verbo inglés
COULD FILTER

Verbo regular: filter - filtered - filtered

Afirmación

Forma simple	Forma con V-ing
I could filter you could filter he could filter we could filter you could filter they could filter	I could be filtering you could be filtering he could be filtering we could be filtering you could be filtering they could be filtering
Perfecto	Perfecto con V-ing
I could have filtered you could have filtered he could have filtered we could have filtered you could have filtered they could have filtered	I could have been filtering you could have been filtering he could have been filtering we could have been filtering you could have been filtering they could have been filtering

Negación

Forma simple	Forma con V-ing
I could not filter you could not filter he could not filter we could not filter you could not filter they could not filter	I could not be filtering you could not be filtering he could not be filtering we could not be filtering you could not be filtering they could not be filtering
Perfecto	Perfecto con V-ing
I could not have filtered you could not have filtered he could not have filtered we could not have filtered you could not have filtered they could not have filtered	I could not have been filtering you could not have been filtering he could not have been filtering we could not have been filtering you could not have been filtering they could not have been filtering

Forma interrogativa

Forma simple	Forma con V-ing
could I filter? could you filter? could he filter? could we filter? could you filter? could they filter?	could I be filtering? could you be filtering? could he be filtering? could we be filtering? could you be filtering? could they be filtering?
Perfecto	Perfecto con V-ing
could I have filtered? could you have filtered? could he have filtered? could we have filtered? could you have filtered? could they have filtered?	could I have been filtering? could you have been filtering? could he have been filtering? could we have been filtering? could you have been filtering? could they have been filtering?

Forma interro-negativa

Forma simple	Forma con V-ing
could I not filter? could you not filter? could he not filter? could we not filter? could you not filter? could they not filter?	could I not be filtering? could you not be filtering? could he not be filtering? could we not be filtering? could you not be filtering? could they not be filtering?
Perfecto	Perfecto con V-ing
could I not have filtered? could you not have filtered? could he not have filtered? could we not have filtered? could you not have filtered? could they not have filtered?	could I not have been filtering? could you not have been filtering? could he not have been filtering? could we not have been filtering? could you not have been filtering? could they not have been filtering?