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