I ought to filter you ought to filter she ought to filter we ought to filter you ought to filter they ought to filter
Forme en V-ing
I ought to be filtering you ought to be filtering she ought to be filtering we ought to be filtering you ought to be filtering they ought to be filtering
Perfect
I ought to have filtered you ought to have filtered she ought to have filtered we ought to have filtered you ought to have filtered they ought to have filtered
Perfect en V-ing
I ought to have been filtering you ought to have been filtering she ought to have been filtering we ought to have been filtering you ought to have been filtering they ought to have been filtering
Négation
Forme simple
I ought not to filter you ought not to filter she ought not to filter we ought not to filter you ought not to filter they ought not to filter
Forme en V-ing
I ought not to filtering you ought not to filtering she ought not to filtering we ought not to filtering you ought not to filtering they ought not to filtering
Perfect
I ought not to have filtered you ought not to have filtered she ought not to have filtered we ought not to have filtered you ought not to have filtered they ought not to have filtered
Perfect en V-ing
I ought not to have been filtering you ought not to have been filtering she ought not to have been filtering we ought not to have been filtering you ought not to have been filtering they ought not to have been filtering
Forme interrogative
Forme simple
ought to I filter? ought to you filter? ought to she filter? ought to we filter? ought to you filter? ought to they filter?
Forme en V-ing
ought to I be filtering? ought to you be filtering? ought to she be filtering? ought to we be filtering? ought to you be filtering? ought to they be filtering?
Perfect
ought to I have filtered? ought to you have filtered? ought to she have filtered? ought to we have filtered? ought to you have filtered? ought to they have filtered?
Perfect en V-ing
ought to I have been filtering? ought to you have been filtering? ought to she have been filtering? ought to we have been filtering? ought to you have been filtering? ought to they have been filtering?
Forme interro-négative
Forme simple
ought I not to filter? ought you not to filter? ought she not to filter? ought we not to filter? ought you not to filter? ought they not to filter?
Forme en V-ing
ought I not to be filtering? ought you not to be filtering? ought she not to be filtering? ought we not to be filtering? ought you not to be filtering? ought they not to be filtering?
Perfect
ought I not to have filtered? ought you not to have filtered? ought she not to have filtered? ought we not to have filtered? ought you not to have filtered? ought they not to have filtered?
Perfect en V-ing
ought I not to have been filtering? ought you not to have been filtering? ought she not to have been filtering? ought we not to have been filtering? ought you not to have been filtering? ought they not to have been filtering?