English verb conjugation
SHOULD PREFER

Regular verb: prefer - preferred - preferred

Affirmation

Simple form	V-ing form
I'd prefer you'd prefer he'd prefer we'd prefer you'd prefer they'd prefer	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	V-ing 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	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	V-ing 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	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	V-ing 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	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	V-ing form
should I prefer? should you prefer? should he prefer? should we prefer? should you prefer? should they prefer?	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	V-ing 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?	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	V-ing 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?	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	V-ing 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?	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?