English verb conjugation
SHOULD HEAD

Regular verb: head - headed - headed

Affirmation

Simple form	V-ing form
I'd head you'd head he'd head we'd head you'd head they'd head	I'd be heading you'd be heading he'd be heading we'd be heading you'd be heading they'd be heading
Perfect	V-ing perfect
I should've headed you should've headed he should've headed we should've headed you should've headed they should've headed	I should've been heading you should've been heading he should've been heading we should've been heading you should've been heading they should've been heading

Negation

Simple form	V-ing form
I shouldn't head you shouldn't head he shouldn't head we shouldn't head you shouldn't head they shouldn't head	I shouldn't be heading you shouldn't be heading he shouldn't be heading we shouldn't be heading you shouldn't be heading they shouldn't be heading
Perfect	V-ing perfect
I shouldn't have headed you shouldn't have headed he shouldn't have headed we shouldn't have headed you shouldn't have headed they shouldn't have headed	I shouldn't have been heading you shouldn't have been heading he shouldn't have been heading we shouldn't have been heading you shouldn't have been heading they shouldn't have been heading

Interrogative form

Simple form	V-ing form
should I head? should you head? should he head? should we head? should you head? should they head?	should I be heading? should you be heading? should he be heading? should we be heading? should you be heading? should they be heading?
Perfect	V-ing perfect
should I have headed? should you have headed? should he have headed? should we have headed? should you have headed? should they have headed?	should I have been heading? should you have been heading? should he have been heading? should we have been heading? should you have been heading? should they have been heading?

Interro-negative form

Simple form	V-ing form
shouldn't I head? shouldn't you head? shouldn't he head? shouldn't we head? shouldn't you head? shouldn't they head?	shouldn't I be heading? shouldn't you be heading? shouldn't he be heading? shouldn't we be heading? shouldn't you be heading? shouldn't they be heading?
Perfect	V-ing perfect
shouldn't I have headed? shouldn't you have headed? shouldn't he have headed? shouldn't we have headed? shouldn't you have headed? shouldn't they have headed?	shouldn't I have been heading? shouldn't you have been heading? shouldn't he have been heading? shouldn't we have been heading? shouldn't you have been heading? shouldn't they have been heading?