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