I'd be fluttering you'd be fluttering she'd be fluttering we'd be fluttering you'd be fluttering they'd be fluttering
Perfect
I should've fluttered you should've fluttered she 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 she 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 she 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 she 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 she 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 she 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 she flutter? should we flutter? should you flutter? should they flutter?
V-ing form
should I be fluttering? should you be fluttering? should she be fluttering? should we be fluttering? should you be fluttering? should they be fluttering?
Perfect
should I have fluttered? should you have fluttered? should she 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 she 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 she 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 she 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 she 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 she have been fluttering? shouldn't we have been fluttering? shouldn't you have been fluttering? shouldn't they have been fluttering?