I ought to filter you ought to filter he ought to filter we ought to filter you ought to filter they ought to filter
Forma con V-ing
I ought to be filtering you ought to be filtering he ought to be filtering we ought to be filtering you ought to be filtering they ought to be filtering
Perfecto
I ought to have filtered you ought to have filtered he ought to have filtered we ought to have filtered you ought to have filtered they ought to have filtered
Perfecto con V-ing
I ought to have been filtering you ought to have been filtering he ought to have been filtering we ought to have been filtering you ought to have been filtering they ought to have been filtering
Negación
Forma simple
I oughtn't to filter you oughtn't to filter he oughtn't to filter we oughtn't to filter you oughtn't to filter they oughtn't to filter
Forma con V-ing
I oughtn't to be filtering you oughtn't to be filtering he oughtn't to be filtering we oughtn't to be filtering you oughtn't to be filtering they oughtn't to be filtering
Perfecto
I oughtn't to have filtered you oughtn't to have filtered he oughtn't to have filtered we oughtn't to have filtered you oughtn't to have filtered they oughtn't to have filtered
Perfecto con V-ing
I oughtn't to have been filtering you oughtn't to have been filtering he oughtn't to have been filtering we oughtn't to have been filtering you oughtn't to have been filtering they oughtn't to have been filtering
Forma interrogativa
Forma simple
ought to I filter? ought to you filter? ought to he filter? ought to we filter? ought to you filter? ought to they filter?
Forma con V-ing
ought to I be filtering? ought to you be filtering? ought to he be filtering? ought to we be filtering? ought to you be filtering? ought to they be filtering?
Perfecto
ought to I have filtered? ought to you have filtered? ought to he have filtered? ought to we have filtered? ought to you have filtered? ought to they have filtered?
Perfecto con V-ing
ought to I have been filtering? ought to you have been filtering? ought to he have been filtering? ought to we have been filtering? ought to you have been filtering? ought to they have been filtering?
Forma interro-negativa
Forma simple
oughtn't I to filter? oughtn't you to filter? oughtn't he to filter? oughtn't we to filter? oughtn't you to filter? oughtn't they to filter?
Forma con V-ing
oughtn't I to be filtering? oughtn't you to be filtering? oughtn't he to be filtering? oughtn't we to be filtering? oughtn't you to be filtering? oughtn't they to be filtering?
Perfecto
oughtn't I to have filtered? oughtn't you to have filtered? oughtn't he to have filtered? oughtn't we to have filtered? oughtn't you to have filtered? oughtn't they to have filtered?
Perfecto con V-ing
oughtn't I to have been filtering? oughtn't you to have been filtering? oughtn't he to have been filtering? oughtn't we to have been filtering? oughtn't you to have been filtering? oughtn't they to have been filtering?