I'd be folding you'd be folding he'd be folding we'd be folding you'd be folding they'd be folding
Perfect
I should've folded you should've folded he should've folded we should've folded you should've folded they should've folded
V-ing perfect
I should've been folding you should've been folding he should've been folding we should've been folding you should've been folding they should've been folding
Negation
Simple form
I shouldn't fold you shouldn't fold he shouldn't fold we shouldn't fold you shouldn't fold they shouldn't fold
V-ing form
I shouldn't be folding you shouldn't be folding he shouldn't be folding we shouldn't be folding you shouldn't be folding they shouldn't be folding
Perfect
I shouldn't have folded you shouldn't have folded he shouldn't have folded we shouldn't have folded you shouldn't have folded they shouldn't have folded
V-ing perfect
I shouldn't have been folding you shouldn't have been folding he shouldn't have been folding we shouldn't have been folding you shouldn't have been folding they shouldn't have been folding
Interrogative form
Simple form
should I fold? should you fold? should he fold? should we fold? should you fold? should they fold?
V-ing form
should I be folding? should you be folding? should he be folding? should we be folding? should you be folding? should they be folding?
Perfect
should I have folded? should you have folded? should he have folded? should we have folded? should you have folded? should they have folded?
V-ing perfect
should I have been folding? should you have been folding? should he have been folding? should we have been folding? should you have been folding? should they have been folding?
Interro-negative form
Simple form
shouldn't I fold? shouldn't you fold? shouldn't he fold? shouldn't we fold? shouldn't you fold? shouldn't they fold?
V-ing form
shouldn't I be folding? shouldn't you be folding? shouldn't he be folding? shouldn't we be folding? shouldn't you be folding? shouldn't they be folding?
Perfect
shouldn't I have folded? shouldn't you have folded? shouldn't he have folded? shouldn't we have folded? shouldn't you have folded? shouldn't they have folded?
V-ing perfect
shouldn't I have been folding? shouldn't you have been folding? shouldn't he have been folding? shouldn't we have been folding? shouldn't you have been folding? shouldn't they have been folding?