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