I'd be ascertaining you'd be ascertaining she'd be ascertaining we'd be ascertaining you'd be ascertaining they'd be ascertaining
Perfecto
I should've ascertained you should've ascertained she should've ascertained we should've ascertained you should've ascertained they should've ascertained
Perfecto con V-ing
I should've been ascertaining you should've been ascertaining she should've been ascertaining we should've been ascertaining you should've been ascertaining they should've been ascertaining
Negación
Forma simple
I shouldn't ascertain you shouldn't ascertain she shouldn't ascertain we shouldn't ascertain you shouldn't ascertain they shouldn't ascertain
Forma con V-ing
I shouldn't be ascertaining you shouldn't be ascertaining she shouldn't be ascertaining we shouldn't be ascertaining you shouldn't be ascertaining they shouldn't be ascertaining
Perfecto
I shouldn't have ascertained you shouldn't have ascertained she shouldn't have ascertained we shouldn't have ascertained you shouldn't have ascertained they shouldn't have ascertained
Perfecto con V-ing
I shouldn't have been ascertaining you shouldn't have been ascertaining she shouldn't have been ascertaining we shouldn't have been ascertaining you shouldn't have been ascertaining they shouldn't have been ascertaining
Forma interrogativa
Forma simple
should I ascertain? should you ascertain? should she ascertain? should we ascertain? should you ascertain? should they ascertain?
Forma con V-ing
should I be ascertaining? should you be ascertaining? should she be ascertaining? should we be ascertaining? should you be ascertaining? should they be ascertaining?
Perfecto
should I have ascertained? should you have ascertained? should she have ascertained? should we have ascertained? should you have ascertained? should they have ascertained?
Perfecto con V-ing
should I have been ascertaining? should you have been ascertaining? should she have been ascertaining? should we have been ascertaining? should you have been ascertaining? should they have been ascertaining?
Forma interro-negativa
Forma simple
shouldn't I ascertain? shouldn't you ascertain? shouldn't she ascertain? shouldn't we ascertain? shouldn't you ascertain? shouldn't they ascertain?
Forma con V-ing
shouldn't I be ascertaining? shouldn't you be ascertaining? shouldn't she be ascertaining? shouldn't we be ascertaining? shouldn't you be ascertaining? shouldn't they be ascertaining?
Perfecto
shouldn't I have ascertained? shouldn't you have ascertained? shouldn't she have ascertained? shouldn't we have ascertained? shouldn't you have ascertained? shouldn't they have ascertained?
Perfecto con V-ing
shouldn't I have been ascertaining? shouldn't you have been ascertaining? shouldn't she have been ascertaining? shouldn't we have been ascertaining? shouldn't you have been ascertaining? shouldn't they have been ascertaining?