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