I should fold you should fold he should fold we should fold you should fold they should fold
V-ing form
I should be folding you should be folding he should be folding we should be folding you should be folding they should be folding
Perfect
I should have folded you should have folded he should have folded we should have folded you should have folded they should have folded
V-ing perfect
I should have been folding you should have been folding he should have been folding we should have been folding you should have been folding they should have been folding
Negation
Simple form
I should not fold you should not fold he should not fold we should not fold you should not fold they should not fold
V-ing form
I should not be folding you should not be folding he should not be folding we should not be folding you should not be folding they should not be folding
Perfect
I should not have folded you should not have folded he should not have folded we should not have folded you should not have folded they should not have folded
V-ing perfect
I should not have been folding you should not have been folding he should not have been folding we should not have been folding you should not have been folding they should not 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
should I not fold? should you not fold? should he not fold? should we not fold? should you not fold? should they not fold?
V-ing form
should I not be folding? should you not be folding? should he not be folding? should we not be folding? should you not be folding? should they not be folding?
Perfect
should I not have folded? should you not have folded? should he not have folded? should we not have folded? should you not have folded? should they not have folded?
V-ing perfect
should I not have been folding? should you not have been folding? should he not have been folding? should we not have been folding? should you not have been folding? should they not have been folding?