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