Coniugazione del verbo inglese
COULD FILTER

Verbo regolare: filter - filtered - filtered

Affermazione

Forma semplice	Forma con V-ing
I could filter you could filter she could filter we could filter you could filter they could filter	I could be filtering you could be filtering she could be filtering we could be filtering you could be filtering they could be filtering
Perfetto	Perfetto con V-ing
I could have filtered you could have filtered she 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 she could have been filtering we could have been filtering you could have been filtering they could have been filtering

Negazione

Forma semplice	Forma con V-ing
I couldn't filter you couldn't filter she couldn't filter we couldn't filter you couldn't filter they couldn't filter	I couldn't be filtering you couldn't be filtering she couldn't be filtering we couldn't be filtering you couldn't be filtering they couldn't be filtering
Perfetto	Perfetto con V-ing
I couldn't have filtered you couldn't have filtered she couldn't have filtered we couldn't have filtered you couldn't have filtered they couldn't have filtered	I couldn't have been filtering you couldn't have been filtering she couldn't have been filtering we couldn't have been filtering you couldn't have been filtering they couldn't have been filtering

Forma interrogativa

Forma semplice	Forma con V-ing
could I filter? could you filter? could she filter? could we filter? could you filter? could they filter?	could I be filtering? could you be filtering? could she be filtering? could we be filtering? could you be filtering? could they be filtering?
Perfetto	Perfetto con V-ing
could I have filtered? could you have filtered? could she 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 she have been filtering? could we have been filtering? could you have been filtering? could they have been filtering?

Forma interro-negativa

Forma semplice	Forma con V-ing
couldn't I filter? couldn't you filter? couldn't she filter? couldn't we filter? couldn't you filter? couldn't they filter?	couldn't I be filtering? couldn't you be filtering? couldn't she be filtering? couldn't we be filtering? couldn't you be filtering? couldn't they be filtering?
Perfetto	Perfetto con V-ing
couldn't I have filtered? couldn't you have filtered? couldn't she have filtered? couldn't we have filtered? couldn't you have filtered? couldn't they have filtered?	couldn't I have been filtering? couldn't you have been filtering? couldn't she have been filtering? couldn't we have been filtering? couldn't you have been filtering? couldn't they have been filtering?