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