English verb conjugation
SHOULD GRATE

Regular verb: grate - grated - grated

Affirmation

Simple form	V-ing form
I'd grate you'd grate he'd grate we'd grate you'd grate they'd grate	I'd be grating you'd be grating he'd be grating we'd be grating you'd be grating they'd be grating
Perfect	V-ing perfect
I should've grated you should've grated he should've grated we should've grated you should've grated they should've grated	I should've been grating you should've been grating he should've been grating we should've been grating you should've been grating they should've been grating

Negation

Simple form	V-ing form
I shouldn't grate you shouldn't grate he shouldn't grate we shouldn't grate you shouldn't grate they shouldn't grate	I shouldn't be grating you shouldn't be grating he shouldn't be grating we shouldn't be grating you shouldn't be grating they shouldn't be grating
Perfect	V-ing perfect
I shouldn't have grated you shouldn't have grated he shouldn't have grated we shouldn't have grated you shouldn't have grated they shouldn't have grated	I shouldn't have been grating you shouldn't have been grating he shouldn't have been grating we shouldn't have been grating you shouldn't have been grating they shouldn't have been grating

Interrogative form

Simple form	V-ing form
should I grate? should you grate? should he grate? should we grate? should you grate? should they grate?	should I be grating? should you be grating? should he be grating? should we be grating? should you be grating? should they be grating?
Perfect	V-ing perfect
should I have grated? should you have grated? should he have grated? should we have grated? should you have grated? should they have grated?	should I have been grating? should you have been grating? should he have been grating? should we have been grating? should you have been grating? should they have been grating?

Interro-negative form

Simple form	V-ing form
shouldn't I grate? shouldn't you grate? shouldn't he grate? shouldn't we grate? shouldn't you grate? shouldn't they grate?	shouldn't I be grating? shouldn't you be grating? shouldn't he be grating? shouldn't we be grating? shouldn't you be grating? shouldn't they be grating?
Perfect	V-ing perfect
shouldn't I have grated? shouldn't you have grated? shouldn't he have grated? shouldn't we have grated? shouldn't you have grated? shouldn't they have grated?	shouldn't I have been grating? shouldn't you have been grating? shouldn't he have been grating? shouldn't we have been grating? shouldn't you have been grating? shouldn't they have been grating?