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