don't I ascertain? don't you ascertain? doesn't she ascertain? don't we ascertain? don't you ascertain? don't they ascertain?
Présent continu
am I not ascertaining? aren't you ascertaining? isn't she ascertaining? aren't we ascertaining? aren't you ascertaining? aren't they ascertaining?
Prétérit
didn't I ascertain? didn't you ascertain? didn't she ascertain? didn't we ascertain? didn't you ascertain? didn't they ascertain?
Prétérit
wasn't I ascertaining? weren't you ascertaining? wasn't she ascertaining? weren't we ascertaining? weren't you ascertaining? weren't they ascertaining?
Present perfect
haven't I ascertained? haven't you ascertained? hasn't she ascertained? haven't we ascertained? haven't you ascertained? haven't they ascertained?
Present perfect continu
haven't I been ascertaining? haven't you been ascertaining? hasn't she been ascertaining? haven't we been ascertaining? haven't you been ascertaining? haven't they been ascertaining?
Pluperfect
hadn't I ascertained? hadn't you ascertained? hadn't she ascertained? hadn't we ascertained? hadn't you ascertained? hadn't they ascertained?
Pluperfect continu
hadn't I been ascertaining? hadn't you been ascertaining? hadn't she been ascertaining? hadn't we been ascertaining? hadn't you been ascertaining? hadn't they been ascertaining?
Futur
won't I ascertain? won't you ascertain? won't she ascertain? won't we ascertain? won't you ascertain? won't they ascertain?
Futur continu
won't I be ascertaining? won't you be ascertaining? won't she be ascertaining? won't we be ascertaining? won't you be ascertaining? won't they be ascertaining?
Futur antérieur
won't I have ascertained? won't you have ascertained? won't she have ascertained? won't we have ascertained? won't you have ascertained? won't they have ascertained?
Futur antérieur continu
won't I have been ascertaining? won't you have been ascertaining? won't she have been ascertaining? won't we have been ascertaining? won't you have been ascertaining? won't they have been ascertaining?
Conditionnel
Présent
wouldn't I ascertain? wouldn't you ascertain? wouldn't she ascertain? wouldn't we ascertain? wouldn't you ascertain? wouldn't they ascertain?
Présent continu
wouldn't I be ascertaining? wouldn't you be ascertaining? wouldn't she be ascertaining? wouldn't we be ascertaining? wouldn't you be ascertaining? wouldn't they be ascertaining?
Passé
wouldn't I have ascertained? wouldn't you have ascertained? wouldn't she have ascertained? wouldn't we have ascertained? wouldn't you have ascertained? wouldn't they have ascertained?
Passé continu
wouldn't I have been ascertaining? wouldn't you have been ascertaining? wouldn't she have been ascertaining? wouldn't we have been ascertaining? wouldn't you have been ascertaining? wouldn't they have been ascertaining?