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