I'd be preferring you'd be preferring he'd be preferring we'd be preferring you'd be preferring they'd be preferring
Perfect
I should've preferred you should've preferred he 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 he 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 he 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 he 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 he 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 he 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 he prefer? should we prefer? should you prefer? should they prefer?
V-ing form
should I be preferring? should you be preferring? should he be preferring? should we be preferring? should you be preferring? should they be preferring?
Perfect
should I have preferred? should you have preferred? should he 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 he 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 he 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 he 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 he 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 he have been preferring? shouldn't we have been preferring? shouldn't you have been preferring? shouldn't they have been preferring?