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