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