I'd be backchecking you'd be backchecking he'd be backchecking we'd be backchecking you'd be backchecking they'd be backchecking
Perfect
I should've backchecked you should've backchecked he should've backchecked we should've backchecked you should've backchecked they should've backchecked
Perfect en V-ing
I should've been backchecking you should've been backchecking he should've been backchecking we should've been backchecking you should've been backchecking they should've been backchecking
Négation
Forme simple
I shouldn't backcheck you shouldn't backcheck he shouldn't backcheck we shouldn't backcheck you shouldn't backcheck they shouldn't backcheck
Forme en V-ing
I shouldn't be backchecking you shouldn't be backchecking he shouldn't be backchecking we shouldn't be backchecking you shouldn't be backchecking they shouldn't be backchecking
Perfect
I shouldn't have backchecked you shouldn't have backchecked he shouldn't have backchecked we shouldn't have backchecked you shouldn't have backchecked they shouldn't have backchecked
Perfect en V-ing
I shouldn't have been backchecking you shouldn't have been backchecking he shouldn't have been backchecking we shouldn't have been backchecking you shouldn't have been backchecking they shouldn't have been backchecking
Forme interrogative
Forme simple
should I backcheck? should you backcheck? should he backcheck? should we backcheck? should you backcheck? should they backcheck?
Forme en V-ing
should I be backchecking? should you be backchecking? should he be backchecking? should we be backchecking? should you be backchecking? should they be backchecking?
Perfect
should I have backchecked? should you have backchecked? should he have backchecked? should we have backchecked? should you have backchecked? should they have backchecked?
Perfect en V-ing
should I have been backchecking? should you have been backchecking? should he have been backchecking? should we have been backchecking? should you have been backchecking? should they have been backchecking?
Forme interro-négative
Forme simple
shouldn't I backcheck? shouldn't you backcheck? shouldn't he backcheck? shouldn't we backcheck? shouldn't you backcheck? shouldn't they backcheck?
Forme en V-ing
shouldn't I be backchecking? shouldn't you be backchecking? shouldn't he be backchecking? shouldn't we be backchecking? shouldn't you be backchecking? shouldn't they be backchecking?
Perfect
shouldn't I have backchecked? shouldn't you have backchecked? shouldn't he have backchecked? shouldn't we have backchecked? shouldn't you have backchecked? shouldn't they have backchecked?
Perfect en V-ing
shouldn't I have been backchecking? shouldn't you have been backchecking? shouldn't he have been backchecking? shouldn't we have been backchecking? shouldn't you have been backchecking? shouldn't they have been backchecking?