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