Conjugaison du verbe anglais
OUGHT TO ASCERTAIN

Verbe régulier : ascertain - ascertained - ascertained
Traduction française : établir - constater

Affirmation

Forme simple	Forme en V-ing
I ought to ascertain you ought to ascertain he ought to ascertain we ought to ascertain you ought to ascertain they ought to ascertain	I ought to be ascertaining you ought to be ascertaining he ought to be ascertaining we ought to be ascertaining you ought to be ascertaining they ought to be ascertaining
Perfect	Perfect en V-ing
I ought to have ascertained you ought to have ascertained he ought to have ascertained we ought to have ascertained you ought to have ascertained they ought to have ascertained	I ought to have been ascertaining you ought to have been ascertaining he ought to have been ascertaining we ought to have been ascertaining you ought to have been ascertaining they ought to have been ascertaining

Négation

Forme simple	Forme en V-ing
I ought not to ascertain you ought not to ascertain he ought not to ascertain we ought not to ascertain you ought not to ascertain they ought not to ascertain	I ought not to ascertaining you ought not to ascertaining he ought not to ascertaining we ought not to ascertaining you ought not to ascertaining they ought not to ascertaining
Perfect	Perfect en V-ing
I ought not to have ascertained you ought not to have ascertained he ought not to have ascertained we ought not to have ascertained you ought not to have ascertained they ought not to have ascertained	I ought not to have been ascertaining you ought not to have been ascertaining he ought not to have been ascertaining we ought not to have been ascertaining you ought not to have been ascertaining they ought not to have been ascertaining

Forme interrogative

Forme simple	Forme en V-ing
ought to I ascertain? ought to you ascertain? ought to he ascertain? ought to we ascertain? ought to you ascertain? ought to they ascertain?	ought to I be ascertaining? ought to you be ascertaining? ought to he be ascertaining? ought to we be ascertaining? ought to you be ascertaining? ought to they be ascertaining?
Perfect	Perfect en V-ing
ought to I have ascertained? ought to you have ascertained? ought to he have ascertained? ought to we have ascertained? ought to you have ascertained? ought to they have ascertained?	ought to I have been ascertaining? ought to you have been ascertaining? ought to he have been ascertaining? ought to we have been ascertaining? ought to you have been ascertaining? ought to they have been ascertaining?

Forme interro-négative

Forme simple	Forme en V-ing
ought I not to ascertain? ought you not to ascertain? ought he not to ascertain? ought we not to ascertain? ought you not to ascertain? ought they not to ascertain?	ought I not to be ascertaining? ought you not to be ascertaining? ought he not to be ascertaining? ought we not to be ascertaining? ought you not to be ascertaining? ought they not to be ascertaining?
Perfect	Perfect en V-ing
ought I not to have ascertained? ought you not to have ascertained? ought he not to have ascertained? ought we not to have ascertained? ought you not to have ascertained? ought they not to have ascertained?	ought I not to have been ascertaining? ought you not to have been ascertaining? ought he not to have been ascertaining? ought we not to have been ascertaining? ought you not to have been ascertaining? ought they not to have been ascertaining?