I'd be buttering you'd be buttering she'd be buttering we'd be buttering you'd be buttering they'd be buttering
Perfect
I should've buttered you should've buttered she should've buttered we should've buttered you should've buttered they should've buttered
V-ing perfect
I should've been buttering you should've been buttering she should've been buttering we should've been buttering you should've been buttering they should've been buttering
Negation
Simple form
I shouldn't butter you shouldn't butter she shouldn't butter we shouldn't butter you shouldn't butter they shouldn't butter
V-ing form
I shouldn't be buttering you shouldn't be buttering she shouldn't be buttering we shouldn't be buttering you shouldn't be buttering they shouldn't be buttering
Perfect
I shouldn't have buttered you shouldn't have buttered she shouldn't have buttered we shouldn't have buttered you shouldn't have buttered they shouldn't have buttered
V-ing perfect
I shouldn't have been buttering you shouldn't have been buttering she shouldn't have been buttering we shouldn't have been buttering you shouldn't have been buttering they shouldn't have been buttering
Interrogative form
Simple form
should I butter? should you butter? should she butter? should we butter? should you butter? should they butter?
V-ing form
should I be buttering? should you be buttering? should she be buttering? should we be buttering? should you be buttering? should they be buttering?
Perfect
should I have buttered? should you have buttered? should she have buttered? should we have buttered? should you have buttered? should they have buttered?
V-ing perfect
should I have been buttering? should you have been buttering? should she have been buttering? should we have been buttering? should you have been buttering? should they have been buttering?
Interro-negative form
Simple form
shouldn't I butter? shouldn't you butter? shouldn't she butter? shouldn't we butter? shouldn't you butter? shouldn't they butter?
V-ing form
shouldn't I be buttering? shouldn't you be buttering? shouldn't she be buttering? shouldn't we be buttering? shouldn't you be buttering? shouldn't they be buttering?
Perfect
shouldn't I have buttered? shouldn't you have buttered? shouldn't she have buttered? shouldn't we have buttered? shouldn't you have buttered? shouldn't they have buttered?
V-ing perfect
shouldn't I have been buttering? shouldn't you have been buttering? shouldn't she have been buttering? shouldn't we have been buttering? shouldn't you have been buttering? shouldn't they have been buttering?