English verb conjugation
SHOULD POSTMARK

Regular verb: postmark - postmarked - postmarked

Affirmation

Simple form	V-ing form
I'd postmark you'd postmark he'd postmark we'd postmark you'd postmark they'd postmark	I'd be postmarking you'd be postmarking he'd be postmarking we'd be postmarking you'd be postmarking they'd be postmarking
Perfect	V-ing perfect
I should've postmarked you should've postmarked he should've postmarked we should've postmarked you should've postmarked they should've postmarked	I should've been postmarking you should've been postmarking he should've been postmarking we should've been postmarking you should've been postmarking they should've been postmarking

Negation

Simple form	V-ing form
I shouldn't postmark you shouldn't postmark he shouldn't postmark we shouldn't postmark you shouldn't postmark they shouldn't postmark	I shouldn't be postmarking you shouldn't be postmarking he shouldn't be postmarking we shouldn't be postmarking you shouldn't be postmarking they shouldn't be postmarking
Perfect	V-ing perfect
I shouldn't have postmarked you shouldn't have postmarked he shouldn't have postmarked we shouldn't have postmarked you shouldn't have postmarked they shouldn't have postmarked	I shouldn't have been postmarking you shouldn't have been postmarking he shouldn't have been postmarking we shouldn't have been postmarking you shouldn't have been postmarking they shouldn't have been postmarking

Interrogative form

Simple form	V-ing form
should I postmark? should you postmark? should he postmark? should we postmark? should you postmark? should they postmark?	should I be postmarking? should you be postmarking? should he be postmarking? should we be postmarking? should you be postmarking? should they be postmarking?
Perfect	V-ing perfect
should I have postmarked? should you have postmarked? should he have postmarked? should we have postmarked? should you have postmarked? should they have postmarked?	should I have been postmarking? should you have been postmarking? should he have been postmarking? should we have been postmarking? should you have been postmarking? should they have been postmarking?

Interro-negative form

Simple form	V-ing form
shouldn't I postmark? shouldn't you postmark? shouldn't he postmark? shouldn't we postmark? shouldn't you postmark? shouldn't they postmark?	shouldn't I be postmarking? shouldn't you be postmarking? shouldn't he be postmarking? shouldn't we be postmarking? shouldn't you be postmarking? shouldn't they be postmarking?
Perfect	V-ing perfect
shouldn't I have postmarked? shouldn't you have postmarked? shouldn't he have postmarked? shouldn't we have postmarked? shouldn't you have postmarked? shouldn't they have postmarked?	shouldn't I have been postmarking? shouldn't you have been postmarking? shouldn't he have been postmarking? shouldn't we have been postmarking? shouldn't you have been postmarking? shouldn't they have been postmarking?