English verb conjugation
SHOULD SERVE

Regular verb: serve - served - served

Affirmation

Simple form	V-ing form
I'd serve you'd serve he'd serve we'd serve you'd serve they'd serve	I'd be serving you'd be serving he'd be serving we'd be serving you'd be serving they'd be serving
Perfect	V-ing perfect
I should've served you should've served he should've served we should've served you should've served they should've served	I should've been serving you should've been serving he should've been serving we should've been serving you should've been serving they should've been serving

Negation

Simple form	V-ing form
I shouldn't serve you shouldn't serve he shouldn't serve we shouldn't serve you shouldn't serve they shouldn't serve	I shouldn't be serving you shouldn't be serving he shouldn't be serving we shouldn't be serving you shouldn't be serving they shouldn't be serving
Perfect	V-ing perfect
I shouldn't have served you shouldn't have served he shouldn't have served we shouldn't have served you shouldn't have served they shouldn't have served	I shouldn't have been serving you shouldn't have been serving he shouldn't have been serving we shouldn't have been serving you shouldn't have been serving they shouldn't have been serving

Interrogative form

Simple form	V-ing form
should I serve? should you serve? should he serve? should we serve? should you serve? should they serve?	should I be serving? should you be serving? should he be serving? should we be serving? should you be serving? should they be serving?
Perfect	V-ing perfect
should I have served? should you have served? should he have served? should we have served? should you have served? should they have served?	should I have been serving? should you have been serving? should he have been serving? should we have been serving? should you have been serving? should they have been serving?

Interro-negative form

Simple form	V-ing form
shouldn't I serve? shouldn't you serve? shouldn't he serve? shouldn't we serve? shouldn't you serve? shouldn't they serve?	shouldn't I be serving? shouldn't you be serving? shouldn't he be serving? shouldn't we be serving? shouldn't you be serving? shouldn't they be serving?
Perfect	V-ing perfect
shouldn't I have served? shouldn't you have served? shouldn't he have served? shouldn't we have served? shouldn't you have served? shouldn't they have served?	shouldn't I have been serving? shouldn't you have been serving? shouldn't he have been serving? shouldn't we have been serving? shouldn't you have been serving? shouldn't they have been serving?