English verb conjugation
SHOULD PREFACE

Regular verb: preface - prefaced - prefaced

Affirmation

Simple form	V-ing form
I'd preface you'd preface he'd preface we'd preface you'd preface they'd preface	I'd be prefacing you'd be prefacing he'd be prefacing we'd be prefacing you'd be prefacing they'd be prefacing
Perfect	V-ing perfect
I should've prefaced you should've prefaced he should've prefaced we should've prefaced you should've prefaced they should've prefaced	I should've been prefacing you should've been prefacing he should've been prefacing we should've been prefacing you should've been prefacing they should've been prefacing

Negation

Simple form	V-ing form
I shouldn't preface you shouldn't preface he shouldn't preface we shouldn't preface you shouldn't preface they shouldn't preface	I shouldn't be prefacing you shouldn't be prefacing he shouldn't be prefacing we shouldn't be prefacing you shouldn't be prefacing they shouldn't be prefacing
Perfect	V-ing perfect
I shouldn't have prefaced you shouldn't have prefaced he shouldn't have prefaced we shouldn't have prefaced you shouldn't have prefaced they shouldn't have prefaced	I shouldn't have been prefacing you shouldn't have been prefacing he shouldn't have been prefacing we shouldn't have been prefacing you shouldn't have been prefacing they shouldn't have been prefacing

Interrogative form

Simple form	V-ing form
should I preface? should you preface? should he preface? should we preface? should you preface? should they preface?	should I be prefacing? should you be prefacing? should he be prefacing? should we be prefacing? should you be prefacing? should they be prefacing?
Perfect	V-ing perfect
should I have prefaced? should you have prefaced? should he have prefaced? should we have prefaced? should you have prefaced? should they have prefaced?	should I have been prefacing? should you have been prefacing? should he have been prefacing? should we have been prefacing? should you have been prefacing? should they have been prefacing?

Interro-negative form

Simple form	V-ing form
shouldn't I preface? shouldn't you preface? shouldn't he preface? shouldn't we preface? shouldn't you preface? shouldn't they preface?	shouldn't I be prefacing? shouldn't you be prefacing? shouldn't he be prefacing? shouldn't we be prefacing? shouldn't you be prefacing? shouldn't they be prefacing?
Perfect	V-ing perfect
shouldn't I have prefaced? shouldn't you have prefaced? shouldn't he have prefaced? shouldn't we have prefaced? shouldn't you have prefaced? shouldn't they have prefaced?	shouldn't I have been prefacing? shouldn't you have been prefacing? shouldn't he have been prefacing? shouldn't we have been prefacing? shouldn't you have been prefacing? shouldn't they have been prefacing?