English verb conjugation
SHOULD SERVE

Regular verb: serve - served - served

Affirmation

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

Negation

Simple form	V-ing form
I should not serve you should not serve he should not serve we should not serve you should not serve they should not serve	I should not be serving you should not be serving he should not be serving we should not be serving you should not be serving they should not be serving
Perfect	V-ing perfect
I should not have served you should not have served he should not have served we should not have served you should not have served they should not have served	I should not have been serving you should not have been serving he should not have been serving we should not have been serving you should not have been serving they should not 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
should I not serve? should you not serve? should he not serve? should we not serve? should you not serve? should they not serve?	should I not be serving? should you not be serving? should he not be serving? should we not be serving? should you not be serving? should they not be serving?
Perfect	V-ing perfect
should I not have served? should you not have served? should he not have served? should we not have served? should you not have served? should they not have served?	should I not have been serving? should you not have been serving? should he not have been serving? should we not have been serving? should you not have been serving? should they not have been serving?