I ought to prevent you ought to prevent she ought to prevent we ought to prevent you ought to prevent they ought to prevent
Forma com V-ing
I ought to be preventing you ought to be preventing she ought to be preventing we ought to be preventing you ought to be preventing they ought to be preventing
Perfeito
I ought to have prevented you ought to have prevented she ought to have prevented we ought to have prevented you ought to have prevented they ought to have prevented
Perfeito com V-ing
I ought to have been preventing you ought to have been preventing she ought to have been preventing we ought to have been preventing you ought to have been preventing they ought to have been preventing
Negação
Forma simple
I ought not to prevent you ought not to prevent she ought not to prevent we ought not to prevent you ought not to prevent they ought not to prevent
Forma com V-ing
I ought not to preventing you ought not to preventing she ought not to preventing we ought not to preventing you ought not to preventing they ought not to preventing
Perfeito
I ought not to have prevented you ought not to have prevented she ought not to have prevented we ought not to have prevented you ought not to have prevented they ought not to have prevented
Perfeito com V-ing
I ought not to have been preventing you ought not to have been preventing she ought not to have been preventing we ought not to have been preventing you ought not to have been preventing they ought not to have been preventing
Forma interrogativa
Forma simple
ought to I prevent? ought to you prevent? ought to she prevent? ought to we prevent? ought to you prevent? ought to they prevent?
Forma com V-ing
ought to I be preventing? ought to you be preventing? ought to she be preventing? ought to we be preventing? ought to you be preventing? ought to they be preventing?
Perfeito
ought to I have prevented? ought to you have prevented? ought to she have prevented? ought to we have prevented? ought to you have prevented? ought to they have prevented?
Perfeito com V-ing
ought to I have been preventing? ought to you have been preventing? ought to she have been preventing? ought to we have been preventing? ought to you have been preventing? ought to they have been preventing?
Forma interro-Negação
Forma simple
ought I not to prevent? ought you not to prevent? ought she not to prevent? ought we not to prevent? ought you not to prevent? ought they not to prevent?
Forma com V-ing
ought I not to be preventing? ought you not to be preventing? ought she not to be preventing? ought we not to be preventing? ought you not to be preventing? ought they not to be preventing?
Perfeito
ought I not to have prevented? ought you not to have prevented? ought she not to have prevented? ought we not to have prevented? ought you not to have prevented? ought they not to have prevented?
Perfeito com V-ing
ought I not to have been preventing? ought you not to have been preventing? ought she not to have been preventing? ought we not to have been preventing? ought you not to have been preventing? ought they not to have been preventing?