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